Generate bindings for the GStreamer Editing Services

2024-11-25 11:01:10 +00:00 · 2018-10-31 13:10:30 -03:00 · 2018-10-31 13:10:30 -03:00 · 0d5ea8e452
commit 0d5ea8e452
parent a17449e2be
32 changed files with 4528 additions and 0 deletions
--- a/.rustfmt.toml
+++ b/.rustfmt.toml
@ -11,4 +11,5 @@ ignore = [
    "gstreamer-sdp/src/auto",
    "gstreamer-video/src/auto",
    "gstreamer-webrtc/src/auto",
+    "gstreamer-editing-services/src/auto",
 ]
--- a/Cargo.toml
+++ b/Cargo.toml
@ -14,6 +14,7 @@ members = [
  "gstreamer-pbutils",
  "gstreamer-webrtc",
  "gstreamer-check",
+  "gstreamer-editing-services",
  "examples",
  "tutorials",
 ]
--- a/Gir_GstEditingServices.toml
+++ b/Gir_GstEditingServices.toml
@ -0,0 +1,110 @@
+[options]
+girs_dir = "gir-files"
+library = "GES"
+version = "1.0"
+min_cfg_version = "1.8"
+target_path = "gstreamer-editing-services"
+work_mode = "normal"
+generate_safety_asserts = true
+single_version_file = true
+
+external_libraries = [
+    "GLib",
+    "GObject",
+    "Gio",
+    "Gst",
+    "GstPbutils",
+]
+
+manual = [
+    "GLib.Error",
+    "GLib.Source",
+    "GLib.DateTime",
+    "Gio.Cancellable",
+    "Gio.AsyncReadyCallback",
+    "GObject.Object",
+    "Gst.Segment",
+    "Gst.StaticCaps",
+    "Gst.StaticPadTemplate",
+    "GstPbutils.EncodingProfile",
+    "GstPbutils.DiscovererInfo",
+    "GstPbutils.DiscovererStreamInfo",
+    "Gst.Object",
+    "Gst.Element",
+    "Gst.Pad",
+    "Gst.Pipeline",
+]
+
+generate = [
+    "GES.EditMode",
+    "GES.PipelineFlags",
+    "GES.Edge",
+    "GES.Effect",
+    "GES.TrackType",
+    "GES.Pipeline",
+    "GES.BaseEffect",
+    "GES.TimelineElement",
+    "GES.Group",
+    "GES.TrackElement",
+    "GES.Track",
+    "GES.Layer",
+    "GES.Clip",
+    "GES.UriClip",
+    "GES.Asset",
+    "GES.UriClipAsset",
+    "GES.UriSourceAsset",
+    "GES.Extractable",
+    "GES.Project",
+]
+
+[[object]]
+name = "Gst.Structure"
+status = "manual"
+ref_mode = "ref-mut"
+
+[[object]]
+name = "Gst.Caps"
+status = "manual"
+ref_mode = "ref"
+
+[[object]]
+name = "Gst.Buffer"
+status = "manual"
+ref_mode = "ref"
+
+[[object]]
+name = "Gst.BufferList"
+status = "manual"
+ref_mode = "ref"
+
+[[object]]
+name = "Gst.Sample"
+status = "manual"
+ref_mode = "ref"
+
+[[object]]
+name = "Gst.ClockTime"
+status = "manual"
+conversion_type = "scalar"
+
+[[object]]
+name = "GES.Timeline"
+status = "generate"
+    [[object.function]]
+    name = "append_layer"
+        [object.function.return]
+        nullable = false
+
+[[object]]
+name = "GES.Container"
+status = "generate"
+trait_name = "GESContainerExt"
+    [[object.function]]
+    name = "add"
+        [object.function.return]
+        bool_return_is_error = "Failed to add element"
+
+    [[object.function]]
+    name = "remove"
+        [object.function.return]
+        bool_return_is_error = "Failed to remove element"
--- a/docs/gstreamer-editing-services/docs.md
+++ b/docs/gstreamer-editing-services/docs.md
--- a/examples/Cargo.toml
+++ b/examples/Cargo.toml
@ -14,6 +14,7 @@ gstreamer-player = { version = "0.12", path = "../gstreamer-player", optional =
 gstreamer-rtsp = { version = "0.12", path = "../gstreamer-rtsp", optional = true }
 gstreamer-rtsp-server = { version = "0.12", path = "../gstreamer-rtsp-server", optional = true }
 gstreamer-rtsp-server-sys = { version = "0.6", features = ["v1_8"], optional = true }
+gstreamer-editing-services = { version = "0.12", optional = true }
 gtk = { version = "0.5", features = ["v3_6"], optional = true }
 gdk = { version = "0.9", optional = true }
 gio = { version = "0.5", optional = true }
@ -27,6 +28,7 @@ pangocairo = { version = "0.6", optional = true }

 [features]
 gst-player = ["gstreamer-player"]
+ges = ["gstreamer-editing-services"]
 gtksink = ["gtk", "gio"]
 gtkvideooverlay = ["gtk", "gdk", "gio"]
 gtkvideooverlay-x11 = ["gtkvideooverlay"]
@ -118,3 +120,7 @@ name = "discoverer"
 [[bin]]
 name = "pango-cairo"
 required-features = ["pango-cairo"]
+
+[[bin]]
+name = "ges"
+required-features = ["ges"]
--- a/examples/src/bin/ges.rs
+++ b/examples/src/bin/ges.rs
@ -0,0 +1,105 @@
+extern crate gstreamer as gst;
+use gst::prelude::*;
+
+extern crate gstreamer_editing_services as ges;
+use ges::prelude::*;
+use ges::PipelineExt;
+
+use std::env;
+
+#[allow(unused_imports)]
+#[path = "../examples-common.rs"]
+mod examples_common;
+
+extern crate failure;
+#[allow(unused_imports)]
+use failure::Error;
+
+extern crate glib;
+
+fn main_loop(uri: &str) -> Result<(), glib::BoolError> {
+    ges::init()?;
+
+    let timeline = ges::Timeline::new_audio_video();
+    let layer = timeline.append_layer();
+    let pipeline = ges::Pipeline::new();
+    pipeline.set_timeline(&timeline);
+
+    let clip = ges::UriClip::new(uri);
+    layer.add_clip(&clip);
+
+    let effect = ges::Effect::new("agingtv");
+    clip.add(&effect).unwrap();
+
+    println!(
+        "Agingtv scratch-lines: {}",
+        clip.get_child_property("scratch-lines")
+            .unwrap()
+            .serialize()
+            .unwrap()
+    );
+
+    let asset = clip.get_asset().unwrap();
+    let duration = asset
+        .downcast::<ges::UriClipAsset>()
+        .unwrap()
+        .get_duration();
+    println!(
+        "Clip duration: {} - playing file from {} for {}",
+        duration,
+        duration / 2,
+        duration / 4
+    );
+
+    clip.set_inpoint(duration / 2);
+    clip.set_duration(duration / 4);
+
+    let ret = pipeline.set_state(gst::State::Playing);
+    assert_ne!(ret, gst::StateChangeReturn::Failure);
+
+    let bus = pipeline.get_bus().unwrap();
+    while let Some(msg) = bus.timed_pop(gst::CLOCK_TIME_NONE) {
+        use gst::MessageView;
+
+        match msg.view() {
+            MessageView::Eos(..) => break,
+            MessageView::Error(err) => {
+                println!(
+                    "Error from {:?}: {} ({:?})",
+                    err.get_src().map(|s| s.get_path_string()),
+                    err.get_error(),
+                    err.get_debug()
+                );
+                break;
+            }
+            _ => (),
+        }
+    }
+
+    let ret = pipeline.set_state(gst::State::Null);
+    assert_ne!(ret, gst::StateChangeReturn::Failure);
+
+    Ok(())
+}
+
+#[allow(unused_variables)]
+fn example_main() {
+    let args: Vec<_> = env::args().collect();
+    let uri: &str = if args.len() == 2 {
+        args[1].as_ref()
+    } else {
+        println!("Usage: ges launch");
+        std::process::exit(-1)
+    };
+
+    match main_loop(uri) {
+        Ok(r) => r,
+        Err(e) => eprintln!("Error! {}", e),
+    }
+}
+
+fn main() {
+    // tutorials_common::run is only required to set up the application environent on macOS
+    // (but not necessary in normal Cocoa applications where this is set up autmatically)
+    examples_common::run(example_main);
+}
--- a/gstreamer-editing-services/Cargo.toml
+++ b/gstreamer-editing-services/Cargo.toml
@ -0,0 +1,47 @@
+[package]
+name = "gstreamer-editing-services"
+version = "0.13.0"
+authors = ["Thibault Saunier <tsaunier@igalia.com>", "Sebastian Dröge <sebastian@centricular.com>"]
+categories = ["api-bindings", "multimedia"]
+description = "Rust bindings for GStreamer Editing Services"
+repository = "https://gitlab.freedesktop.org/gstreamer/gstreamer-rs"
+license = "MIT/Apache-2.0"
+readme = "README.md"
+homepage = "https://gstreamer.freedesktop.org"
+documentation = "https://sdroege.github.io/rustdoc/gstreamer/gstreamer_editing_services"
+keywords = ["gstreamer", "multimedia", "gnome", "nle", "video editing"]
+build = "build.rs"
+
+[dependencies]
+libc = "0.2"
+bitflags = "1.0"
+glib-sys = { git = "https://github.com/gtk-rs/sys" }
+gio-sys = { git = "https://github.com/gtk-rs/sys" }
+gobject-sys = { git = "https://github.com/gtk-rs/sys" }
+gstreamer-sys = { git = "https://gitlab.freedesktop.org/gstreamer/gstreamer-rs-sys" }
+gstreamer-base-sys = { git = "https://gitlab.freedesktop.org/gstreamer/gstreamer-rs-sys" }
+gstreamer-pbutils-sys = { git = "https://gitlab.freedesktop.org/gstreamer/gstreamer-rs-sys" }
+gstreamer-editing-services-sys = { git = "https://gitlab.freedesktop.org/gstreamer/gstreamer-rs-sys", features = ["v1_8"]}
+
+glib = { git = "https://github.com/gtk-rs/glib" }
+gio = { git = "https://github.com/gtk-rs/gio" }
+gstreamer = { path = "../gstreamer" }
+gstreamer-base = { path = "../gstreamer-base" }
+gstreamer-pbutils = { path = "../gstreamer-pbutils" }
+
+[build-dependencies.rustdoc-stripper]
+version = "0.1"
+optional = true
+
+[features]
+v1_8 = ["gstreamer-editing-services-sys/v1_8"]
+v1_10 = ["gstreamer-editing-services-sys/v1_10"]
+v1_12 = ["gstreamer-editing-services-sys/v1_12", "v1_10"]
+v1_14 = ["gstreamer-editing-services-sys/v1_14", "v1_12"]
+v1_16 = ["gstreamer-editing-services-sys/v1_16", "v1_14"]
+embed-lgpl-docs = ["rustdoc-stripper"]
+purge-lgpl-docs = ["rustdoc-stripper"]
+dox = ["gstreamer-editing-services-sys/dox", "glib/dox", "gstreamer/dox"]
+
+[badges]
+gitlab = { repository = "https://gitlab.freedesktop.org/gstreamer/gstreamer-rs", branch = "master" }
--- a/gstreamer-editing-services/README.md
+++ b/gstreamer-editing-services/README.md
@ -0,0 +1,175 @@
+# gstreamer-rs [![crates.io](https://img.shields.io/crates/v/gstreamer-editing-services.svg)](https://crates.io/crates/gstreamer-editing-services)  [![pipeline status](https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/badges/master/pipeline.svg)](https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/commits/master)
+
+[GStreamer Editing Services](https://gstreamer.freedesktop.org/) bindings for Rust.
+Documentation can be found [here](https://sdroege.github.io/rustdoc/gstreamer/gstreamer/).
+
+NOTE: The GStreamer Editing Services API is not Thread Safe and before the 1.16
+release this was not properly expressed in the code, leading to possible data
+unsafety even in the rust bindings. We strongly encourage you to run with
+GES >= 1.16.
+
+These bindings are providing a safe API that can be used to interface with
+GStreamer, e.g. for writing GStreamer-based applications.
+
+For background and motivation, see the [announcement blogpost](https://coaxion.net/blog/2017/07/writing-gstreamer-applications-in-rust/).
+
+The bindings (since 0.8.0) are autogenerated with [gir](https://github.com/gtk-rs/gir/)
+based on the [GObject-Introspection](https://wiki.gnome.org/Projects/GObjectIntrospection/)
+API metadata provided by the GStreamer project. Older versions before 0.8.0 were manually
+written and the repository can be found [here](https://github.com/arturoc/gstreamer1.0-rs).
+The API of the two is incompatible.
+
+A crate for writing GStreamer plugins in Rust can be found here: https://github.com/sdroege/gst-plugin-rs
+
+## Table of Contents
+1. [Installation](#installation)
+   1. [Linux/BSDs](#installation-linux)
+   1. [macOS](#installation-macos)
+   1. [Windows](#installation-windows)
+1. [Getting Started](#getting-started)
+1. [License](#license)
+1. [Contribution](#contribution)
+
+<a name="installation"/>
+
+## Installation
+
+To build the GStreamer bindings or anything depending on them, you need to
+have at least GStreamer 1.8, gst-plugins-base 1.8 and gstreamer-editing-services
+1.8 installed.
+
+<a name="installation-linux"/>
+
+### Linux/BSDs
+
+You need to install the above mentioned packages with your distributions
+package manager, or build them from source.
+
+On Debian/Ubuntu they can be installed with
+
+```
+$ apt-get install libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev \
+      gstreamer1.0-plugins-base gstreamer1.0-plugins-good \
+      gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly \
+      gstreamer1.0-libav libges-1.0
+```
+
+Package names on other distributions should be similar.
+Please submit a pull request with instructions for yours.
+
+<a name="installation-macos"/>
+
+### macOS
+
+You can install GStreamer and the plugins via [Homebrew](https://brew.sh/) or
+by installing the [binaries](https://gstreamer.freedesktop.org/data/pkg/osx/)
+provided by the GStreamer project.
+
+#### Homebrew
+
+```
+$ brew install gstreamer gst-plugins-base gst-plugins-good \
+      gst-plugins-bad gst-plugins-ugly gst-libav gst-editing-services
+```
+
+#### GStreamer Binaries
+
+You need to download the *two* `.pkg` files from the GStreamer website and
+install them, e.g. `gstreamer-1.0-1.12.3-x86_64.pkg` and
+`gstreamer-1.0-devel-1.12.3-x86_64.pkg`.
+
+After installation, you also need to install `pkg-config` (e.g. via Homebrew)
+and set the `PKG_CONFIG_PATH` environment variable
+
+```
+$ export PKG_CONFIG_PATH="/Frameworks/GStreamer.framework/Versions/Current/lib/pkgconfig${PKG_CONFIG_PATH:+:$PKG_CONFIG_PATH}"
+```
+
+<a name="installation-windows"/>
+
+### Windows
+
+You can install GStreamer and the plugins via [MSYS2](http://www.msys2.org/)
+with `pacman` or by installing the
+[binaries](https://gstreamer.freedesktop.org/data/pkg/windows/) provided by
+the GStreamer project.
+
+#### MSYS2 / pacman
+
+```
+$ pacman -S pkg-config mingw-w64-x86_64-gstreamer mingw-w64-x86_64-gst-plugins-base \
+      mingw-w64-x86_64-gst-plugins-good mingw-w64-x86_64-gst-plugins-bad \
+      mingw-w64-x86_64-gst-plugins-ugly mingw-w64-x86_64-gst-libav \
+      mingw-w64-x86_64-gst-editing-services
+```
+
+#### GStreamer Binaries
+
+You need to download the *two* `.msi` files for your platform from the
+GStreamer website and install them, e.g. `gstreamer-1.0-x86_64-1.12.3.msi` and
+`gstreamer-1.0-devel-x86_64-1.12.3.msi`.
+
+After installation, you also need to install `pkg-config` (e.g. via MSYS2 or
+from [here](https://sourceforge.net/projects/pkgconfiglite/))
+and set the `PKG_CONFIG_PATH` environment variable
+
+```
+$ export PKG_CONFIG_PATH="c:\\gstreamer\\1.0\\x86_64\\lib\\pkgconfig${PKG_CONFIG_PATH:+:$PKG_CONFIG_PATH}"
+```
+
+<a name="getting-started"/>
+
+## Getting Started
+
+The API reference can be found
+[here](https://sdroege.github.io/rustdoc/gstreamer/gstreamer/), however it is
+only the Rust API reference and does not explain any of the concepts.
+
+For getting started with GStreamer development, the best would be to follow
+the [documentation](https://gstreamer.freedesktop.org/documentation/) on the
+GStreamer website, especially the [Application Development
+Manual](https://gstreamer.freedesktop.org/documentation/application-development/).
+While being C-centric, it explains all the fundamental concepts of GStreamer
+and the code examples should be relatively easily translatable to Rust. The
+API is basically the same, function/struct names are the same and everything
+is only more convenient (hopefully) and safer.
+
+In addition there are
+[tutorials](https://gstreamer.freedesktop.org/documentation/tutorials/) on the
+GStreamer website. Many of them were ported to Rust already and the code can
+be found in the
+[tutorials](https://github.com/sdroege/gstreamer-rs/tree/master/tutorials)
+directory.
+
+Some further examples for various aspects of GStreamer and how to use it from
+Rust can be found in the
+[examples](https://github.com/sdroege/gstreamer-rs/tree/master/examples)
+directory.
+
+<a name="license"/>
+
+## LICENSE
+
+gstreamer-rs and all crates contained in here are licensed under either of
+
+ * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+   http://www.apache.org/licenses/LICENSE-2.0)
+ * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+   http://opensource.org/licenses/MIT)
+
+at your option.
+
+GStreamer itself is licensed under the Lesser General Public License version
+2.1 or (at your option) any later version:
+https://www.gnu.org/licenses/lgpl-2.1.html
+
+<a name="contribution"/>
+
+## Contribution
+
+Any kinds of contributions are welcome as a pull request.
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in gstreamer-rs by you, as defined in the Apache-2.0 license, shall be
+dual licensed as above, without any additional terms or conditions.
+
--- a/gstreamer-editing-services/build.rs
+++ b/gstreamer-editing-services/build.rs
@ -0,0 +1,34 @@
+fn main() {
+    manage_docs();
+}
+
+#[cfg(any(feature = "embed-lgpl-docs", feature = "purge-lgpl-docs"))]
+fn manage_docs() {
+    extern crate stripper_lib;
+    use std::io;
+
+    let path = "src";
+    let ignores: &[&str] = &[];
+
+    stripper_lib::loop_over_files(
+        path.as_ref(),
+        &mut |w, s| stripper_lib::strip_comments(w, s, &mut io::sink(), true),
+        &ignores,
+        false,
+    );
+
+    #[cfg(feature = "embed-lgpl-docs")]
+    {
+        let docs = include_str!("../docs/gstreamer-editing-services/docs.md");
+        let mut infos = stripper_lib::parse_cmts(docs.lines(), true);
+        stripper_lib::loop_over_files(
+            path.as_ref(),
+            &mut |w, s| stripper_lib::regenerate_comments(w, s, &mut infos, true, true),
+            &ignores,
+            false,
+        );
+    }
+}
+
+#[cfg(not(any(feature = "embed-lgpl-docs", feature = "purge-lgpl-docs")))]
+fn manage_docs() {}
--- a/gstreamer-editing-services/src/auto/asset.rs
+++ b/gstreamer-editing-services/src/auto/asset.rs
@ -0,0 +1,245 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from gir-files (https://github.com/gtk-rs/gir-files)
+// DO NOT EDIT
+
+use Error;
+use Extractable;
+use ffi;
+#[cfg(feature = "futures")]
+use futures_core;
+use gio;
+use gio_ffi;
+use glib;
+use glib::Value;
+use glib::object::Downcast;
+use glib::object::IsA;
+use glib::signal::SignalHandlerId;
+use glib::signal::connect;
+use glib::translate::*;
+use glib_ffi;
+use gobject_ffi;
+use std::boxed::Box as Box_;
+use std::mem;
+use std::mem::transmute;
+use std::ptr;
+
+glib_wrapper! {
+    pub struct Asset(Object<ffi::GESAsset, ffi::GESAssetClass>);
+
+    match fn {
+        get_type => || ffi::ges_asset_get_type(),
+    }
+}
+
+impl Asset {
+    pub fn needs_reload(extractable_type: glib::types::Type, id: &str) -> bool {
+        assert_initialized_main_thread!();
+        unsafe {
+            from_glib(ffi::ges_asset_needs_reload(extractable_type.to_glib(), id.to_glib_none().0))
+        }
+    }
+
+    pub fn request<'a, P: Into<Option<&'a str>>>(extractable_type: glib::types::Type, id: P) -> Result<Option<Asset>, Error> {
+        assert_initialized_main_thread!();
+        let id = id.into();
+        let id = id.to_glib_none();
+        unsafe {
+            let mut error = ptr::null_mut();
+            let ret = ffi::ges_asset_request(extractable_type.to_glib(), id.0, &mut error);
+            if error.is_null() { Ok(from_glib_full(ret)) } else { Err(from_glib_full(error)) }
+        }
+    }
+
+    pub fn request_async<'a, P: Into<Option<&'a gio::Cancellable>>, Q: FnOnce(Result<Asset, Error>) + Send + 'static>(extractable_type: glib::types::Type, id: &str, cancellable: P, callback: Q) {
+        assert_initialized_main_thread!();
+        let cancellable = cancellable.into();
+        let cancellable = cancellable.to_glib_none();
+        let user_data: Box<Box<Q>> = Box::new(Box::new(callback));
+        unsafe extern "C" fn request_async_trampoline<Q: FnOnce(Result<Asset, Error>) + Send + 'static>(_source_object: *mut gobject_ffi::GObject, res: *mut gio_ffi::GAsyncResult, user_data: glib_ffi::gpointer)
+        {
+            let mut error = ptr::null_mut();
+            let ret = ffi::ges_asset_request_finish(res, &mut error);
+            let result = if error.is_null() { Ok(from_glib_full(ret)) } else { Err(from_glib_full(error)) };
+            let callback: Box<Box<Q>> = Box::from_raw(user_data as *mut _);
+            callback(result);
+        }
+        let callback = request_async_trampoline::<Q>;
+        unsafe {
+            ffi::ges_asset_request_async(extractable_type.to_glib(), id.to_glib_none().0, cancellable.0, Some(callback), Box::into_raw(user_data) as *mut _);
+        }
+    }
+
+    #[cfg(feature = "futures")]
+    pub fn request_async_future(extractable_type: glib::types::Type, id: &str) -> Box_<futures_core::Future<Item = Asset, Error = Error>> {
+        use gio::GioFuture;
+        use fragile::Fragile;
+
+        let id = String::from(id);
+        GioFuture::new(&(), move |_obj, send| {
+            let cancellable = gio::Cancellable::new();
+            let send = Fragile::new(send);
+            Self::request_async(
+                 extractable_type,
+                 &id,
+                 Some(&cancellable),
+                 move |res| {
+                     let _ = send.into_inner().send(res);
+                 },
+            );
+
+            cancellable
+        })
+    }
+}
+
+pub trait AssetExt {
+    fn extract(&self) -> Result<Option<Extractable>, Error>;
+
+    fn get_error(&self) -> Option<Error>;
+
+    fn get_extractable_type(&self) -> glib::types::Type;
+
+    fn get_id(&self) -> Option<String>;
+
+    fn get_proxy(&self) -> Option<Asset>;
+
+    fn get_proxy_target(&self) -> Option<Asset>;
+
+    fn list_proxies(&self) -> Vec<Asset>;
+
+    fn set_proxy<'a, P: IsA<Asset> + 'a, Q: Into<Option<&'a P>>>(&self, proxy: Q) -> bool;
+
+    fn unproxy<P: IsA<Asset>>(&self, proxy: &P) -> bool;
+
+    fn set_property_proxy_target<P: IsA<Asset> + IsA<glib::object::Object> + glib::value::SetValueOptional>(&self, proxy_target: Option<&P>);
+
+    fn connect_property_extractable_type_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_id_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_proxy_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_proxy_target_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+}
+
+impl<O: IsA<Asset> + IsA<glib::object::Object>> AssetExt for O {
+    fn extract(&self) -> Result<Option<Extractable>, Error> {
+        unsafe {
+            let mut error = ptr::null_mut();
+            let ret = ffi::ges_asset_extract(self.to_glib_none().0, &mut error);
+            if error.is_null() { Ok(from_glib_none(ret)) } else { Err(from_glib_full(error)) }
+        }
+    }
+
+    fn get_error(&self) -> Option<Error> {
+        unsafe {
+            from_glib_none(ffi::ges_asset_get_error(self.to_glib_none().0))
+        }
+    }
+
+    fn get_extractable_type(&self) -> glib::types::Type {
+        unsafe {
+            from_glib(ffi::ges_asset_get_extractable_type(self.to_glib_none().0))
+        }
+    }
+
+    fn get_id(&self) -> Option<String> {
+        unsafe {
+            from_glib_none(ffi::ges_asset_get_id(self.to_glib_none().0))
+        }
+    }
+
+    fn get_proxy(&self) -> Option<Asset> {
+        unsafe {
+            from_glib_none(ffi::ges_asset_get_proxy(self.to_glib_none().0))
+        }
+    }
+
+    fn get_proxy_target(&self) -> Option<Asset> {
+        unsafe {
+            from_glib_none(ffi::ges_asset_get_proxy_target(self.to_glib_none().0))
+        }
+    }
+
+    fn list_proxies(&self) -> Vec<Asset> {
+        unsafe {
+            FromGlibPtrContainer::from_glib_none(ffi::ges_asset_list_proxies(self.to_glib_none().0))
+        }
+    }
+
+    fn set_proxy<'a, P: IsA<Asset> + 'a, Q: Into<Option<&'a P>>>(&self, proxy: Q) -> bool {
+        let proxy = proxy.into();
+        let proxy = proxy.to_glib_none();
+        unsafe {
+            from_glib(ffi::ges_asset_set_proxy(self.to_glib_none().0, proxy.0))
+        }
+    }
+
+    fn unproxy<P: IsA<Asset>>(&self, proxy: &P) -> bool {
+        unsafe {
+            from_glib(ffi::ges_asset_unproxy(self.to_glib_none().0, proxy.to_glib_none().0))
+        }
+    }
+
+    fn set_property_proxy_target<P: IsA<Asset> + IsA<glib::object::Object> + glib::value::SetValueOptional>(&self, proxy_target: Option<&P>) {
+        unsafe {
+            gobject_ffi::g_object_set_property(self.to_glib_none().0, "proxy-target".to_glib_none().0, Value::from(proxy_target).to_glib_none().0);
+        }
+    }
+
+    fn connect_property_extractable_type_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::extractable-type",
+                transmute(notify_extractable_type_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_id_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::id",
+                transmute(notify_id_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_proxy_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::proxy",
+                transmute(notify_proxy_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_proxy_target_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::proxy-target",
+                transmute(notify_proxy_target_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+}
+
+unsafe extern "C" fn notify_extractable_type_trampoline<P>(this: *mut ffi::GESAsset, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Asset> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Asset::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_id_trampoline<P>(this: *mut ffi::GESAsset, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Asset> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Asset::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_proxy_trampoline<P>(this: *mut ffi::GESAsset, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Asset> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Asset::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_proxy_target_trampoline<P>(this: *mut ffi::GESAsset, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Asset> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Asset::from_glib_borrow(this).downcast_unchecked())
+}
--- a/gstreamer-editing-services/src/auto/base_effect.rs
+++ b/gstreamer-editing-services/src/auto/base_effect.rs
@ -0,0 +1,23 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from gir-files (https://github.com/gtk-rs/gir-files)
+// DO NOT EDIT
+
+use Extractable;
+use TimelineElement;
+use TrackElement;
+use ffi;
+use glib::translate::*;
+use glib_ffi;
+use gobject_ffi;
+use std::mem;
+use std::ptr;
+
+glib_wrapper! {
+    pub struct BaseEffect(Object<ffi::GESBaseEffect, ffi::GESBaseEffectClass>): TrackElement, TimelineElement, Extractable;
+
+    match fn {
+        get_type => || ffi::ges_base_effect_get_type(),
+    }
+}
+
+impl BaseEffect {}
--- a/gstreamer-editing-services/src/auto/clip.rs
+++ b/gstreamer-editing-services/src/auto/clip.rs
@ -0,0 +1,178 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from gir-files (https://github.com/gtk-rs/gir-files)
+// DO NOT EDIT
+
+use Asset;
+use BaseEffect;
+use Container;
+use Extractable;
+use Layer;
+use TimelineElement;
+use Track;
+use TrackElement;
+use TrackType;
+use ffi;
+use glib;
+use glib::object::Downcast;
+use glib::object::IsA;
+use glib::signal::SignalHandlerId;
+use glib::signal::connect;
+use glib::translate::*;
+use glib_ffi;
+use gobject_ffi;
+use std::boxed::Box as Box_;
+use std::mem;
+use std::mem::transmute;
+use std::ptr;
+
+glib_wrapper! {
+    pub struct Clip(Object<ffi::GESClip, ffi::GESClipClass>): Container, TimelineElement, Extractable;
+
+    match fn {
+        get_type => || ffi::ges_clip_get_type(),
+    }
+}
+
+pub trait ClipExt {
+    fn add_asset<P: IsA<Asset>>(&self, asset: &P) -> Option<TrackElement>;
+
+    fn find_track_element<'a, P: IsA<Track> + 'a, Q: Into<Option<&'a P>>>(&self, track: Q, type_: glib::types::Type) -> Option<TrackElement>;
+
+    fn find_track_elements<'a, P: IsA<Track> + 'a, Q: Into<Option<&'a P>>>(&self, track: Q, track_type: TrackType, type_: glib::types::Type) -> Vec<TrackElement>;
+
+    fn get_layer(&self) -> Option<Layer>;
+
+    fn get_supported_formats(&self) -> TrackType;
+
+    fn get_top_effect_index<P: IsA<BaseEffect>>(&self, effect: &P) -> i32;
+
+    fn get_top_effect_position<P: IsA<BaseEffect>>(&self, effect: &P) -> i32;
+
+    fn get_top_effects(&self) -> Vec<TrackElement>;
+
+    fn move_to_layer(&self, layer: &Layer) -> bool;
+
+    fn set_supported_formats(&self, supportedformats: TrackType);
+
+    fn set_top_effect_index<P: IsA<BaseEffect>>(&self, effect: &P, newindex: u32) -> bool;
+
+    fn set_top_effect_priority<P: IsA<BaseEffect>>(&self, effect: &P, newpriority: u32) -> bool;
+
+    fn split(&self, position: u64) -> Option<Clip>;
+
+    fn connect_property_layer_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_supported_formats_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+}
+
+impl<O: IsA<Clip> + IsA<glib::object::Object>> ClipExt for O {
+    fn add_asset<P: IsA<Asset>>(&self, asset: &P) -> Option<TrackElement> {
+        unsafe {
+            from_glib_none(ffi::ges_clip_add_asset(self.to_glib_none().0, asset.to_glib_none().0))
+        }
+    }
+
+    fn find_track_element<'a, P: IsA<Track> + 'a, Q: Into<Option<&'a P>>>(&self, track: Q, type_: glib::types::Type) -> Option<TrackElement> {
+        let track = track.into();
+        let track = track.to_glib_none();
+        unsafe {
+            from_glib_full(ffi::ges_clip_find_track_element(self.to_glib_none().0, track.0, type_.to_glib()))
+        }
+    }
+
+    fn find_track_elements<'a, P: IsA<Track> + 'a, Q: Into<Option<&'a P>>>(&self, track: Q, track_type: TrackType, type_: glib::types::Type) -> Vec<TrackElement> {
+        let track = track.into();
+        let track = track.to_glib_none();
+        unsafe {
+            FromGlibPtrContainer::from_glib_full(ffi::ges_clip_find_track_elements(self.to_glib_none().0, track.0, track_type.to_glib(), type_.to_glib()))
+        }
+    }
+
+    fn get_layer(&self) -> Option<Layer> {
+        unsafe {
+            from_glib_full(ffi::ges_clip_get_layer(self.to_glib_none().0))
+        }
+    }
+
+    fn get_supported_formats(&self) -> TrackType {
+        unsafe {
+            from_glib(ffi::ges_clip_get_supported_formats(self.to_glib_none().0))
+        }
+    }
+
+    fn get_top_effect_index<P: IsA<BaseEffect>>(&self, effect: &P) -> i32 {
+        unsafe {
+            ffi::ges_clip_get_top_effect_index(self.to_glib_none().0, effect.to_glib_none().0)
+        }
+    }
+
+    fn get_top_effect_position<P: IsA<BaseEffect>>(&self, effect: &P) -> i32 {
+        unsafe {
+            ffi::ges_clip_get_top_effect_position(self.to_glib_none().0, effect.to_glib_none().0)
+        }
+    }
+
+    fn get_top_effects(&self) -> Vec<TrackElement> {
+        unsafe {
+            FromGlibPtrContainer::from_glib_full(ffi::ges_clip_get_top_effects(self.to_glib_none().0))
+        }
+    }
+
+    fn move_to_layer(&self, layer: &Layer) -> bool {
+        unsafe {
+            from_glib(ffi::ges_clip_move_to_layer(self.to_glib_none().0, layer.to_glib_none().0))
+        }
+    }
+
+    fn set_supported_formats(&self, supportedformats: TrackType) {
+        unsafe {
+            ffi::ges_clip_set_supported_formats(self.to_glib_none().0, supportedformats.to_glib());
+        }
+    }
+
+    fn set_top_effect_index<P: IsA<BaseEffect>>(&self, effect: &P, newindex: u32) -> bool {
+        unsafe {
+            from_glib(ffi::ges_clip_set_top_effect_index(self.to_glib_none().0, effect.to_glib_none().0, newindex))
+        }
+    }
+
+    fn set_top_effect_priority<P: IsA<BaseEffect>>(&self, effect: &P, newpriority: u32) -> bool {
+        unsafe {
+            from_glib(ffi::ges_clip_set_top_effect_priority(self.to_glib_none().0, effect.to_glib_none().0, newpriority))
+        }
+    }
+
+    fn split(&self, position: u64) -> Option<Clip> {
+        unsafe {
+            from_glib_none(ffi::ges_clip_split(self.to_glib_none().0, position))
+        }
+    }
+
+    fn connect_property_layer_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::layer",
+                transmute(notify_layer_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_supported_formats_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::supported-formats",
+                transmute(notify_supported_formats_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+}
+
+unsafe extern "C" fn notify_layer_trampoline<P>(this: *mut ffi::GESClip, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Clip> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Clip::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_supported_formats_trampoline<P>(this: *mut ffi::GESClip, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Clip> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Clip::from_glib_borrow(this).downcast_unchecked())
+}
--- a/gstreamer-editing-services/src/auto/container.rs
+++ b/gstreamer-editing-services/src/auto/container.rs
@ -0,0 +1,143 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from gir-files (https://github.com/gtk-rs/gir-files)
+// DO NOT EDIT
+
+use Edge;
+use EditMode;
+use Extractable;
+use Layer;
+use TimelineElement;
+use ffi;
+use glib;
+use glib::StaticType;
+use glib::Value;
+use glib::object::Downcast;
+use glib::object::IsA;
+use glib::signal::SignalHandlerId;
+use glib::signal::connect;
+use glib::translate::*;
+use glib_ffi;
+use gobject_ffi;
+use std::boxed::Box as Box_;
+use std::mem;
+use std::mem::transmute;
+use std::ptr;
+
+glib_wrapper! {
+    pub struct Container(Object<ffi::GESContainer, ffi::GESContainerClass>): TimelineElement, Extractable;
+
+    match fn {
+        get_type => || ffi::ges_container_get_type(),
+    }
+}
+
+impl Container {
+    pub fn group(containers: &[Container]) -> Option<Container> {
+        assert_initialized_main_thread!();
+        unsafe {
+            from_glib_none(ffi::ges_container_group(containers.to_glib_none().0))
+        }
+    }
+}
+
+pub trait GESContainerExt {
+    fn add<P: IsA<TimelineElement>>(&self, child: &P) -> Result<(), glib::error::BoolError>;
+
+    fn edit(&self, layers: &[Layer], new_layer_priority: i32, mode: EditMode, edge: Edge, position: u64) -> bool;
+
+    fn get_children(&self, recursive: bool) -> Vec<TimelineElement>;
+
+    fn remove<P: IsA<TimelineElement>>(&self, child: &P) -> Result<(), glib::error::BoolError>;
+
+    fn ungroup(&self, recursive: bool) -> Vec<Container>;
+
+    fn get_property_height(&self) -> u32;
+
+    fn connect_child_added<F: Fn(&Self, &TimelineElement) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_child_removed<F: Fn(&Self, &TimelineElement) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_height_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+}
+
+impl<O: IsA<Container> + IsA<glib::object::Object>> GESContainerExt for O {
+    fn add<P: IsA<TimelineElement>>(&self, child: &P) -> Result<(), glib::error::BoolError> {
+        unsafe {
+            glib::error::BoolError::from_glib(ffi::ges_container_add(self.to_glib_none().0, child.to_glib_none().0), "Failed to add element")
+        }
+    }
+
+    fn edit(&self, layers: &[Layer], new_layer_priority: i32, mode: EditMode, edge: Edge, position: u64) -> bool {
+        unsafe {
+            from_glib(ffi::ges_container_edit(self.to_glib_none().0, layers.to_glib_none().0, new_layer_priority, mode.to_glib(), edge.to_glib(), position))
+        }
+    }
+
+    fn get_children(&self, recursive: bool) -> Vec<TimelineElement> {
+        unsafe {
+            FromGlibPtrContainer::from_glib_full(ffi::ges_container_get_children(self.to_glib_none().0, recursive.to_glib()))
+        }
+    }
+
+    fn remove<P: IsA<TimelineElement>>(&self, child: &P) -> Result<(), glib::error::BoolError> {
+        unsafe {
+            glib::error::BoolError::from_glib(ffi::ges_container_remove(self.to_glib_none().0, child.to_glib_none().0), "Failed to remove element")
+        }
+    }
+
+    fn ungroup(&self, recursive: bool) -> Vec<Container> {
+        unsafe {
+            FromGlibPtrContainer::from_glib_full(ffi::ges_container_ungroup(self.to_glib_full(), recursive.to_glib()))
+        }
+    }
+
+    fn get_property_height(&self) -> u32 {
+        unsafe {
+            let mut value = Value::from_type(<u32 as StaticType>::static_type());
+            gobject_ffi::g_object_get_property(self.to_glib_none().0, "height".to_glib_none().0, value.to_glib_none_mut().0);
+            value.get().unwrap()
+        }
+    }
+
+    fn connect_child_added<F: Fn(&Self, &TimelineElement) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self, &TimelineElement) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "child-added",
+                transmute(child_added_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_child_removed<F: Fn(&Self, &TimelineElement) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self, &TimelineElement) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "child-removed",
+                transmute(child_removed_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_height_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::height",
+                transmute(notify_height_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+}
+
+unsafe extern "C" fn child_added_trampoline<P>(this: *mut ffi::GESContainer, element: *mut ffi::GESTimelineElement, f: glib_ffi::gpointer)
+where P: IsA<Container> {
+    let f: &&(Fn(&P, &TimelineElement) + 'static) = transmute(f);
+    f(&Container::from_glib_borrow(this).downcast_unchecked(), &from_glib_borrow(element))
+}
+
+unsafe extern "C" fn child_removed_trampoline<P>(this: *mut ffi::GESContainer, element: *mut ffi::GESTimelineElement, f: glib_ffi::gpointer)
+where P: IsA<Container> {
+    let f: &&(Fn(&P, &TimelineElement) + 'static) = transmute(f);
+    f(&Container::from_glib_borrow(this).downcast_unchecked(), &from_glib_borrow(element))
+}
+
+unsafe extern "C" fn notify_height_trampoline<P>(this: *mut ffi::GESContainer, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Container> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Container::from_glib_borrow(this).downcast_unchecked())
+}
--- a/gstreamer-editing-services/src/auto/effect.rs
+++ b/gstreamer-editing-services/src/auto/effect.rs
@ -0,0 +1,70 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from gir-files (https://github.com/gtk-rs/gir-files)
+// DO NOT EDIT
+
+use BaseEffect;
+use Extractable;
+use TimelineElement;
+use TrackElement;
+use ffi;
+use glib;
+use glib::StaticType;
+use glib::Value;
+use glib::object::Downcast;
+use glib::object::IsA;
+use glib::signal::SignalHandlerId;
+use glib::signal::connect;
+use glib::translate::*;
+use glib_ffi;
+use gobject_ffi;
+use std::boxed::Box as Box_;
+use std::mem;
+use std::mem::transmute;
+use std::ptr;
+
+glib_wrapper! {
+    pub struct Effect(Object<ffi::GESEffect, ffi::GESEffectClass>): BaseEffect, TrackElement, TimelineElement, Extractable;
+
+    match fn {
+        get_type => || ffi::ges_effect_get_type(),
+    }
+}
+
+impl Effect {
+    pub fn new(bin_description: &str) -> Effect {
+        assert_initialized_main_thread!();
+        unsafe {
+            from_glib_none(ffi::ges_effect_new(bin_description.to_glib_none().0))
+        }
+    }
+}
+
+pub trait EffectExt {
+    fn get_property_bin_description(&self) -> Option<String>;
+
+    fn connect_property_bin_description_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+}
+
+impl<O: IsA<Effect> + IsA<glib::object::Object>> EffectExt for O {
+    fn get_property_bin_description(&self) -> Option<String> {
+        unsafe {
+            let mut value = Value::from_type(<String as StaticType>::static_type());
+            gobject_ffi::g_object_get_property(self.to_glib_none().0, "bin-description".to_glib_none().0, value.to_glib_none_mut().0);
+            value.get()
+        }
+    }
+
+    fn connect_property_bin_description_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::bin-description",
+                transmute(notify_bin_description_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+}
+
+unsafe extern "C" fn notify_bin_description_trampoline<P>(this: *mut ffi::GESEffect, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Effect> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Effect::from_glib_borrow(this).downcast_unchecked())
+}
--- a/gstreamer-editing-services/src/auto/enums.rs
+++ b/gstreamer-editing-services/src/auto/enums.rs
@ -0,0 +1,142 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from gir-files (https://github.com/gtk-rs/gir-files)
+// DO NOT EDIT
+
+use ffi;
+use glib::StaticType;
+use glib::Type;
+use glib::translate::*;
+use glib::value::FromValue;
+use glib::value::FromValueOptional;
+use glib::value::SetValue;
+use glib::value::Value;
+use gobject_ffi;
+
+#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash)]
+#[derive(Clone, Copy)]
+pub enum Edge {
+    EdgeStart,
+    EdgeEnd,
+    EdgeNone,
+    #[doc(hidden)]
+    __Unknown(i32),
+}
+
+#[doc(hidden)]
+impl ToGlib for Edge {
+    type GlibType = ffi::GESEdge;
+
+    fn to_glib(&self) -> ffi::GESEdge {
+        match *self {
+            Edge::EdgeStart => ffi::GES_EDGE_START,
+            Edge::EdgeEnd => ffi::GES_EDGE_END,
+            Edge::EdgeNone => ffi::GES_EDGE_NONE,
+            Edge::__Unknown(value) => value
+        }
+    }
+}
+
+#[doc(hidden)]
+impl FromGlib<ffi::GESEdge> for Edge {
+    fn from_glib(value: ffi::GESEdge) -> Self {
+        skip_assert_initialized!();
+        match value {
+            0 => Edge::EdgeStart,
+            1 => Edge::EdgeEnd,
+            2 => Edge::EdgeNone,
+            value => Edge::__Unknown(value),
+        }
+    }
+}
+
+impl StaticType for Edge {
+    fn static_type() -> Type {
+        unsafe { from_glib(ffi::ges_edge_get_type()) }
+    }
+}
+
+impl<'a> FromValueOptional<'a> for Edge {
+    unsafe fn from_value_optional(value: &Value) -> Option<Self> {
+        Some(FromValue::from_value(value))
+    }
+}
+
+impl<'a> FromValue<'a> for Edge {
+    unsafe fn from_value(value: &Value) -> Self {
+        from_glib(gobject_ffi::g_value_get_enum(value.to_glib_none().0))
+    }
+}
+
+impl SetValue for Edge {
+    unsafe fn set_value(value: &mut Value, this: &Self) {
+        gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, this.to_glib())
+    }
+}
+
+#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash)]
+#[derive(Clone, Copy)]
+pub enum EditMode {
+    EditNormal,
+    EditRipple,
+    EditRoll,
+    EditTrim,
+    EditSlide,
+    #[doc(hidden)]
+    __Unknown(i32),
+}
+
+#[doc(hidden)]
+impl ToGlib for EditMode {
+    type GlibType = ffi::GESEditMode;
+
+    fn to_glib(&self) -> ffi::GESEditMode {
+        match *self {
+            EditMode::EditNormal => ffi::GES_EDIT_MODE_NORMAL,
+            EditMode::EditRipple => ffi::GES_EDIT_MODE_RIPPLE,
+            EditMode::EditRoll => ffi::GES_EDIT_MODE_ROLL,
+            EditMode::EditTrim => ffi::GES_EDIT_MODE_TRIM,
+            EditMode::EditSlide => ffi::GES_EDIT_MODE_SLIDE,
+            EditMode::__Unknown(value) => value
+        }
+    }
+}
+
+#[doc(hidden)]
+impl FromGlib<ffi::GESEditMode> for EditMode {
+    fn from_glib(value: ffi::GESEditMode) -> Self {
+        skip_assert_initialized!();
+        match value {
+            0 => EditMode::EditNormal,
+            1 => EditMode::EditRipple,
+            2 => EditMode::EditRoll,
+            3 => EditMode::EditTrim,
+            4 => EditMode::EditSlide,
+            value => EditMode::__Unknown(value),
+        }
+    }
+}
+
+impl StaticType for EditMode {
+    fn static_type() -> Type {
+        unsafe { from_glib(ffi::ges_edit_mode_get_type()) }
+    }
+}
+
+impl<'a> FromValueOptional<'a> for EditMode {
+    unsafe fn from_value_optional(value: &Value) -> Option<Self> {
+        Some(FromValue::from_value(value))
+    }
+}
+
+impl<'a> FromValue<'a> for EditMode {
+    unsafe fn from_value(value: &Value) -> Self {
+        from_glib(gobject_ffi::g_value_get_enum(value.to_glib_none().0))
+    }
+}
+
+impl SetValue for EditMode {
+    unsafe fn set_value(value: &mut Value, this: &Self) {
+        gobject_ffi::g_value_set_enum(value.to_glib_none_mut().0, this.to_glib())
+    }
+}
+
--- a/gstreamer-editing-services/src/auto/extractable.rs
+++ b/gstreamer-editing-services/src/auto/extractable.rs
@ -0,0 +1,48 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from gir-files (https://github.com/gtk-rs/gir-files)
+// DO NOT EDIT
+
+use Asset;
+use ffi;
+use glib::object::IsA;
+use glib::translate::*;
+use glib_ffi;
+use gobject_ffi;
+use std::mem;
+use std::ptr;
+
+glib_wrapper! {
+    pub struct Extractable(Object<ffi::GESExtractable, ffi::GESExtractableInterface>);
+
+    match fn {
+        get_type => || ffi::ges_extractable_get_type(),
+    }
+}
+
+pub trait ExtractableExt {
+    fn get_asset(&self) -> Option<Asset>;
+
+    fn get_id(&self) -> Option<String>;
+
+    fn set_asset<P: IsA<Asset>>(&self, asset: &P) -> bool;
+}
+
+impl<O: IsA<Extractable>> ExtractableExt for O {
+    fn get_asset(&self) -> Option<Asset> {
+        unsafe {
+            from_glib_none(ffi::ges_extractable_get_asset(self.to_glib_none().0))
+        }
+    }
+
+    fn get_id(&self) -> Option<String> {
+        unsafe {
+            from_glib_full(ffi::ges_extractable_get_id(self.to_glib_none().0))
+        }
+    }
+
+    fn set_asset<P: IsA<Asset>>(&self, asset: &P) -> bool {
+        unsafe {
+            from_glib(ffi::ges_extractable_set_asset(self.to_glib_none().0, asset.to_glib_none().0))
+        }
+    }
+}
--- a/gstreamer-editing-services/src/auto/flags.rs
+++ b/gstreamer-editing-services/src/auto/flags.rs
@ -0,0 +1,116 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from gir-files (https://github.com/gtk-rs/gir-files)
+// DO NOT EDIT
+
+use ffi;
+use glib::StaticType;
+use glib::Type;
+use glib::translate::*;
+use glib::value::FromValue;
+use glib::value::FromValueOptional;
+use glib::value::SetValue;
+use glib::value::Value;
+use gobject_ffi;
+
+bitflags! {
+    pub struct PipelineFlags: u32 {
+        const AUDIO_PREVIEW = 1;
+        const VIDEO_PREVIEW = 2;
+        const FULL_PREVIEW = 3;
+        const RENDER = 4;
+        const SMART_RENDER = 8;
+    }
+}
+
+#[doc(hidden)]
+impl ToGlib for PipelineFlags {
+    type GlibType = ffi::GESPipelineFlags;
+
+    fn to_glib(&self) -> ffi::GESPipelineFlags {
+        self.bits()
+    }
+}
+
+#[doc(hidden)]
+impl FromGlib<ffi::GESPipelineFlags> for PipelineFlags {
+    fn from_glib(value: ffi::GESPipelineFlags) -> PipelineFlags {
+        skip_assert_initialized!();
+        PipelineFlags::from_bits_truncate(value)
+    }
+}
+
+impl StaticType for PipelineFlags {
+    fn static_type() -> Type {
+        unsafe { from_glib(ffi::ges_pipeline_flags_get_type()) }
+    }
+}
+
+impl<'a> FromValueOptional<'a> for PipelineFlags {
+    unsafe fn from_value_optional(value: &Value) -> Option<Self> {
+        Some(FromValue::from_value(value))
+    }
+}
+
+impl<'a> FromValue<'a> for PipelineFlags {
+    unsafe fn from_value(value: &Value) -> Self {
+        from_glib(gobject_ffi::g_value_get_flags(value.to_glib_none().0))
+    }
+}
+
+impl SetValue for PipelineFlags {
+    unsafe fn set_value(value: &mut Value, this: &Self) {
+        gobject_ffi::g_value_set_flags(value.to_glib_none_mut().0, this.to_glib())
+    }
+}
+
+bitflags! {
+    pub struct TrackType: u32 {
+        const UNKNOWN = 1;
+        const AUDIO = 2;
+        const VIDEO = 4;
+        const TEXT = 8;
+        const CUSTOM = 16;
+    }
+}
+
+#[doc(hidden)]
+impl ToGlib for TrackType {
+    type GlibType = ffi::GESTrackType;
+
+    fn to_glib(&self) -> ffi::GESTrackType {
+        self.bits()
+    }
+}
+
+#[doc(hidden)]
+impl FromGlib<ffi::GESTrackType> for TrackType {
+    fn from_glib(value: ffi::GESTrackType) -> TrackType {
+        skip_assert_initialized!();
+        TrackType::from_bits_truncate(value)
+    }
+}
+
+impl StaticType for TrackType {
+    fn static_type() -> Type {
+        unsafe { from_glib(ffi::ges_track_type_get_type()) }
+    }
+}
+
+impl<'a> FromValueOptional<'a> for TrackType {
+    unsafe fn from_value_optional(value: &Value) -> Option<Self> {
+        Some(FromValue::from_value(value))
+    }
+}
+
+impl<'a> FromValue<'a> for TrackType {
+    unsafe fn from_value(value: &Value) -> Self {
+        from_glib(gobject_ffi::g_value_get_flags(value.to_glib_none().0))
+    }
+}
+
+impl SetValue for TrackType {
+    unsafe fn set_value(value: &mut Value, this: &Self) {
+        gobject_ffi::g_value_set_flags(value.to_glib_none_mut().0, this.to_glib())
+    }
+}
+
--- a/gstreamer-editing-services/src/auto/group.rs
+++ b/gstreamer-editing-services/src/auto/group.rs
@ -0,0 +1,219 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from gir-files (https://github.com/gtk-rs/gir-files)
+// DO NOT EDIT
+
+use Container;
+use Extractable;
+use TimelineElement;
+use ffi;
+use glib;
+use glib::StaticType;
+use glib::Value;
+use glib::object::Downcast;
+use glib::object::IsA;
+use glib::signal::SignalHandlerId;
+use glib::signal::connect;
+use glib::translate::*;
+use glib_ffi;
+use gobject_ffi;
+use std::boxed::Box as Box_;
+use std::mem;
+use std::mem::transmute;
+use std::ptr;
+
+glib_wrapper! {
+    pub struct Group(Object<ffi::GESGroup, ffi::GESGroupClass>): Container, TimelineElement, Extractable;
+
+    match fn {
+        get_type => || ffi::ges_group_get_type(),
+    }
+}
+
+impl Group {
+    pub fn new() -> Group {
+        assert_initialized_main_thread!();
+        unsafe {
+            from_glib_none(ffi::ges_group_new())
+        }
+    }
+}
+
+impl Default for Group {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+pub trait GroupExt {
+    fn get_property_duration(&self) -> u64;
+
+    fn set_property_duration(&self, duration: u64);
+
+    fn get_property_in_point(&self) -> u64;
+
+    fn set_property_in_point(&self, in_point: u64);
+
+    fn get_property_max_duration(&self) -> u64;
+
+    fn set_property_max_duration(&self, max_duration: u64);
+
+    fn get_property_priority(&self) -> u32;
+
+    fn set_property_priority(&self, priority: u32);
+
+    fn get_property_start(&self) -> u64;
+
+    fn set_property_start(&self, start: u64);
+
+    fn connect_property_duration_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_in_point_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_max_duration_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_priority_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_start_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+}
+
+impl<O: IsA<Group> + IsA<glib::object::Object>> GroupExt for O {
+    fn get_property_duration(&self) -> u64 {
+        unsafe {
+            let mut value = Value::from_type(<u64 as StaticType>::static_type());
+            gobject_ffi::g_object_get_property(self.to_glib_none().0, "duration".to_glib_none().0, value.to_glib_none_mut().0);
+            value.get().unwrap()
+        }
+    }
+
+    fn set_property_duration(&self, duration: u64) {
+        unsafe {
+            gobject_ffi::g_object_set_property(self.to_glib_none().0, "duration".to_glib_none().0, Value::from(&duration).to_glib_none().0);
+        }
+    }
+
+    fn get_property_in_point(&self) -> u64 {
+        unsafe {
+            let mut value = Value::from_type(<u64 as StaticType>::static_type());
+            gobject_ffi::g_object_get_property(self.to_glib_none().0, "in-point".to_glib_none().0, value.to_glib_none_mut().0);
+            value.get().unwrap()
+        }
+    }
+
+    fn set_property_in_point(&self, in_point: u64) {
+        unsafe {
+            gobject_ffi::g_object_set_property(self.to_glib_none().0, "in-point".to_glib_none().0, Value::from(&in_point).to_glib_none().0);
+        }
+    }
+
+    fn get_property_max_duration(&self) -> u64 {
+        unsafe {
+            let mut value = Value::from_type(<u64 as StaticType>::static_type());
+            gobject_ffi::g_object_get_property(self.to_glib_none().0, "max-duration".to_glib_none().0, value.to_glib_none_mut().0);
+            value.get().unwrap()
+        }
+    }
+
+    fn set_property_max_duration(&self, max_duration: u64) {
+        unsafe {
+            gobject_ffi::g_object_set_property(self.to_glib_none().0, "max-duration".to_glib_none().0, Value::from(&max_duration).to_glib_none().0);
+        }
+    }
+
+    fn get_property_priority(&self) -> u32 {
+        unsafe {
+            let mut value = Value::from_type(<u32 as StaticType>::static_type());
+            gobject_ffi::g_object_get_property(self.to_glib_none().0, "priority".to_glib_none().0, value.to_glib_none_mut().0);
+            value.get().unwrap()
+        }
+    }
+
+    fn set_property_priority(&self, priority: u32) {
+        unsafe {
+            gobject_ffi::g_object_set_property(self.to_glib_none().0, "priority".to_glib_none().0, Value::from(&priority).to_glib_none().0);
+        }
+    }
+
+    fn get_property_start(&self) -> u64 {
+        unsafe {
+            let mut value = Value::from_type(<u64 as StaticType>::static_type());
+            gobject_ffi::g_object_get_property(self.to_glib_none().0, "start".to_glib_none().0, value.to_glib_none_mut().0);
+            value.get().unwrap()
+        }
+    }
+
+    fn set_property_start(&self, start: u64) {
+        unsafe {
+            gobject_ffi::g_object_set_property(self.to_glib_none().0, "start".to_glib_none().0, Value::from(&start).to_glib_none().0);
+        }
+    }
+
+    fn connect_property_duration_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::duration",
+                transmute(notify_duration_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_in_point_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::in-point",
+                transmute(notify_in_point_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_max_duration_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::max-duration",
+                transmute(notify_max_duration_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_priority_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::priority",
+                transmute(notify_priority_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_start_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::start",
+                transmute(notify_start_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+}
+
+unsafe extern "C" fn notify_duration_trampoline<P>(this: *mut ffi::GESGroup, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Group> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Group::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_in_point_trampoline<P>(this: *mut ffi::GESGroup, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Group> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Group::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_max_duration_trampoline<P>(this: *mut ffi::GESGroup, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Group> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Group::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_priority_trampoline<P>(this: *mut ffi::GESGroup, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Group> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Group::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_start_trampoline<P>(this: *mut ffi::GESGroup, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Group> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Group::from_glib_borrow(this).downcast_unchecked())
+}
--- a/gstreamer-editing-services/src/auto/layer.rs
+++ b/gstreamer-editing-services/src/auto/layer.rs
@ -0,0 +1,220 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from gir-files (https://github.com/gtk-rs/gir-files)
+// DO NOT EDIT
+
+use Asset;
+use Clip;
+use Extractable;
+use Timeline;
+use TrackType;
+use ffi;
+use glib;
+use glib::object::Downcast;
+use glib::object::IsA;
+use glib::signal::SignalHandlerId;
+use glib::signal::connect;
+use glib::translate::*;
+use glib_ffi;
+use gobject_ffi;
+use gst;
+use std::boxed::Box as Box_;
+use std::mem;
+use std::mem::transmute;
+use std::ptr;
+
+glib_wrapper! {
+    pub struct Layer(Object<ffi::GESLayer, ffi::GESLayerClass>): Extractable;
+
+    match fn {
+        get_type => || ffi::ges_layer_get_type(),
+    }
+}
+
+impl Layer {
+    pub fn new() -> Layer {
+        assert_initialized_main_thread!();
+        unsafe {
+            from_glib_none(ffi::ges_layer_new())
+        }
+    }
+}
+
+impl Default for Layer {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+pub trait LayerExt {
+    fn add_asset<P: IsA<Asset>>(&self, asset: &P, start: gst::ClockTime, inpoint: gst::ClockTime, duration: gst::ClockTime, track_types: TrackType) -> Option<Clip>;
+
+    fn add_clip<P: IsA<Clip>>(&self, clip: &P) -> bool;
+
+    fn get_auto_transition(&self) -> bool;
+
+    fn get_clips(&self) -> Vec<Clip>;
+
+    fn get_clips_in_interval(&self, start: gst::ClockTime, end: gst::ClockTime) -> Vec<Clip>;
+
+    fn get_duration(&self) -> gst::ClockTime;
+
+    fn get_priority(&self) -> u32;
+
+    fn get_timeline(&self) -> Option<Timeline>;
+
+    fn is_empty(&self) -> bool;
+
+    fn remove_clip<P: IsA<Clip>>(&self, clip: &P) -> bool;
+
+    fn set_auto_transition(&self, auto_transition: bool);
+
+    #[cfg_attr(feature = "v1_16", deprecated)]
+    fn set_priority(&self, priority: u32);
+
+    fn set_timeline(&self, timeline: &Timeline);
+
+    fn connect_clip_added<F: Fn(&Self, &Clip) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_clip_removed<F: Fn(&Self, &Clip) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_auto_transition_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    #[cfg_attr(feature = "v1_16", deprecated)]
+    fn connect_property_priority_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+}
+
+impl<O: IsA<Layer> + IsA<glib::object::Object>> LayerExt for O {
+    fn add_asset<P: IsA<Asset>>(&self, asset: &P, start: gst::ClockTime, inpoint: gst::ClockTime, duration: gst::ClockTime, track_types: TrackType) -> Option<Clip> {
+        unsafe {
+            from_glib_none(ffi::ges_layer_add_asset(self.to_glib_none().0, asset.to_glib_none().0, start.to_glib(), inpoint.to_glib(), duration.to_glib(), track_types.to_glib()))
+        }
+    }
+
+    fn add_clip<P: IsA<Clip>>(&self, clip: &P) -> bool {
+        unsafe {
+            from_glib(ffi::ges_layer_add_clip(self.to_glib_none().0, clip.to_glib_none().0))
+        }
+    }
+
+    fn get_auto_transition(&self) -> bool {
+        unsafe {
+            from_glib(ffi::ges_layer_get_auto_transition(self.to_glib_none().0))
+        }
+    }
+
+    fn get_clips(&self) -> Vec<Clip> {
+        unsafe {
+            FromGlibPtrContainer::from_glib_full(ffi::ges_layer_get_clips(self.to_glib_none().0))
+        }
+    }
+
+    fn get_clips_in_interval(&self, start: gst::ClockTime, end: gst::ClockTime) -> Vec<Clip> {
+        unsafe {
+            FromGlibPtrContainer::from_glib_full(ffi::ges_layer_get_clips_in_interval(self.to_glib_none().0, start.to_glib(), end.to_glib()))
+        }
+    }
+
+    fn get_duration(&self) -> gst::ClockTime {
+        unsafe {
+            from_glib(ffi::ges_layer_get_duration(self.to_glib_none().0))
+        }
+    }
+
+    fn get_priority(&self) -> u32 {
+        unsafe {
+            ffi::ges_layer_get_priority(self.to_glib_none().0)
+        }
+    }
+
+    fn get_timeline(&self) -> Option<Timeline> {
+        unsafe {
+            from_glib_none(ffi::ges_layer_get_timeline(self.to_glib_none().0))
+        }
+    }
+
+    fn is_empty(&self) -> bool {
+        unsafe {
+            from_glib(ffi::ges_layer_is_empty(self.to_glib_none().0))
+        }
+    }
+
+    fn remove_clip<P: IsA<Clip>>(&self, clip: &P) -> bool {
+        unsafe {
+            from_glib(ffi::ges_layer_remove_clip(self.to_glib_none().0, clip.to_glib_none().0))
+        }
+    }
+
+    fn set_auto_transition(&self, auto_transition: bool) {
+        unsafe {
+            ffi::ges_layer_set_auto_transition(self.to_glib_none().0, auto_transition.to_glib());
+        }
+    }
+
+    fn set_priority(&self, priority: u32) {
+        unsafe {
+            ffi::ges_layer_set_priority(self.to_glib_none().0, priority);
+        }
+    }
+
+    fn set_timeline(&self, timeline: &Timeline) {
+        unsafe {
+            ffi::ges_layer_set_timeline(self.to_glib_none().0, timeline.to_glib_none().0);
+        }
+    }
+
+    fn connect_clip_added<F: Fn(&Self, &Clip) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self, &Clip) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "clip-added",
+                transmute(clip_added_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_clip_removed<F: Fn(&Self, &Clip) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self, &Clip) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "clip-removed",
+                transmute(clip_removed_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_auto_transition_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::auto-transition",
+                transmute(notify_auto_transition_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_priority_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::priority",
+                transmute(notify_priority_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+}
+
+unsafe extern "C" fn clip_added_trampoline<P>(this: *mut ffi::GESLayer, clip: *mut ffi::GESClip, f: glib_ffi::gpointer)
+where P: IsA<Layer> {
+    let f: &&(Fn(&P, &Clip) + 'static) = transmute(f);
+    f(&Layer::from_glib_borrow(this).downcast_unchecked(), &from_glib_borrow(clip))
+}
+
+unsafe extern "C" fn clip_removed_trampoline<P>(this: *mut ffi::GESLayer, clip: *mut ffi::GESClip, f: glib_ffi::gpointer)
+where P: IsA<Layer> {
+    let f: &&(Fn(&P, &Clip) + 'static) = transmute(f);
+    f(&Layer::from_glib_borrow(this).downcast_unchecked(), &from_glib_borrow(clip))
+}
+
+unsafe extern "C" fn notify_auto_transition_trampoline<P>(this: *mut ffi::GESLayer, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Layer> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Layer::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_priority_trampoline<P>(this: *mut ffi::GESLayer, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Layer> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Layer::from_glib_borrow(this).downcast_unchecked())
+}
--- a/gstreamer-editing-services/src/auto/mod.rs
+++ b/gstreamer-editing-services/src/auto/mod.rs
@ -0,0 +1,98 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from gir-files (https://github.com/gtk-rs/gir-files)
+// DO NOT EDIT
+
+mod asset;
+pub use self::asset::Asset;
+pub use self::asset::AssetExt;
+
+mod base_effect;
+pub use self::base_effect::BaseEffect;
+
+mod clip;
+pub use self::clip::Clip;
+pub use self::clip::ClipExt;
+
+mod container;
+pub use self::container::Container;
+pub use self::container::GESContainerExt;
+
+mod effect;
+pub use self::effect::Effect;
+pub use self::effect::EffectExt;
+
+mod extractable;
+pub use self::extractable::Extractable;
+pub use self::extractable::ExtractableExt;
+
+mod group;
+pub use self::group::Group;
+pub use self::group::GroupExt;
+
+mod layer;
+pub use self::layer::Layer;
+pub use self::layer::LayerExt;
+
+mod pipeline;
+pub use self::pipeline::Pipeline;
+pub use self::pipeline::PipelineExt;
+
+mod project;
+pub use self::project::Project;
+pub use self::project::ProjectExt;
+
+mod timeline;
+pub use self::timeline::Timeline;
+pub use self::timeline::TimelineExt;
+
+mod timeline_element;
+pub use self::timeline_element::TimelineElement;
+pub use self::timeline_element::TimelineElementExt;
+
+mod track;
+pub use self::track::Track;
+pub use self::track::TrackExt;
+
+mod track_element;
+pub use self::track_element::TrackElement;
+pub use self::track_element::TrackElementExt;
+
+mod uri_clip;
+pub use self::uri_clip::UriClip;
+pub use self::uri_clip::UriClipExt;
+
+mod uri_clip_asset;
+pub use self::uri_clip_asset::UriClipAsset;
+pub use self::uri_clip_asset::UriClipAssetExt;
+
+mod uri_source_asset;
+pub use self::uri_source_asset::UriSourceAsset;
+pub use self::uri_source_asset::UriSourceAssetExt;
+
+mod enums;
+pub use self::enums::Edge;
+pub use self::enums::EditMode;
+
+mod flags;
+pub use self::flags::PipelineFlags;
+pub use self::flags::TrackType;
+
+#[doc(hidden)]
+pub mod traits {
+    pub use super::AssetExt;
+    pub use super::ClipExt;
+    pub use super::GESContainerExt;
+    pub use super::EffectExt;
+    pub use super::ExtractableExt;
+    pub use super::GroupExt;
+    pub use super::LayerExt;
+    pub use super::PipelineExt;
+    pub use super::ProjectExt;
+    pub use super::TimelineExt;
+    pub use super::TimelineElementExt;
+    pub use super::TrackExt;
+    pub use super::TrackElementExt;
+    pub use super::UriClipExt;
+    pub use super::UriClipAssetExt;
+    pub use super::UriSourceAssetExt;
+}
--- a/gstreamer-editing-services/src/auto/pipeline.rs
+++ b/gstreamer-editing-services/src/auto/pipeline.rs
@ -0,0 +1,324 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from gir-files (https://github.com/gtk-rs/gir-files)
+// DO NOT EDIT
+
+use Error;
+use PipelineFlags;
+use Timeline;
+use ffi;
+use glib;
+use glib::StaticType;
+use glib::Value;
+use glib::object::Downcast;
+use glib::object::IsA;
+use glib::signal::SignalHandlerId;
+use glib::signal::connect;
+use glib::translate::*;
+use glib_ffi;
+use gobject_ffi;
+use gst;
+use gst_ffi;
+use gst_pbutils;
+use std::boxed::Box as Box_;
+use std::mem;
+use std::mem::transmute;
+use std::ptr;
+
+glib_wrapper! {
+    pub struct Pipeline(Object<ffi::GESPipeline, ffi::GESPipelineClass>): [
+        gst::Pipeline => gst_ffi::GstPipeline,
+        gst::Element => gst_ffi::GstElement,
+        gst::Object => gst_ffi::GstObject,
+    ];
+
+    match fn {
+        get_type => || ffi::ges_pipeline_get_type(),
+    }
+}
+
+impl Pipeline {
+    pub fn new() -> Pipeline {
+        assert_initialized_main_thread!();
+        unsafe {
+            from_glib_none(ffi::ges_pipeline_new())
+        }
+    }
+}
+
+impl Default for Pipeline {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+pub trait PipelineExt {
+    fn get_mode(&self) -> PipelineFlags;
+
+    fn get_thumbnail(&self, caps: &gst::Caps) -> Option<gst::Sample>;
+
+    fn get_thumbnail_rgb24(&self, width: i32, height: i32) -> Option<gst::Sample>;
+
+    fn preview_get_audio_sink(&self) -> Option<gst::Element>;
+
+    fn preview_get_video_sink(&self) -> Option<gst::Element>;
+
+    fn preview_set_audio_sink<P: IsA<gst::Element>>(&self, sink: &P);
+
+    fn preview_set_video_sink<P: IsA<gst::Element>>(&self, sink: &P);
+
+    fn save_thumbnail(&self, width: i32, height: i32, format: &str, location: &str) -> Result<(), Error>;
+
+    fn set_mode(&self, mode: PipelineFlags) -> bool;
+
+    fn set_render_settings<P: IsA<gst_pbutils::EncodingProfile>>(&self, output_uri: &str, profile: &P) -> bool;
+
+    fn set_timeline(&self, timeline: &Timeline) -> bool;
+
+    fn get_property_audio_filter(&self) -> Option<gst::Element>;
+
+    fn set_property_audio_filter<P: IsA<gst::Element> + IsA<glib::object::Object> + glib::value::SetValueOptional>(&self, audio_filter: Option<&P>);
+
+    fn get_property_audio_sink(&self) -> Option<gst::Element>;
+
+    fn set_property_audio_sink<P: IsA<gst::Element> + IsA<glib::object::Object> + glib::value::SetValueOptional>(&self, audio_sink: Option<&P>);
+
+    fn get_property_timeline(&self) -> Option<Timeline>;
+
+    fn get_property_video_filter(&self) -> Option<gst::Element>;
+
+    fn set_property_video_filter<P: IsA<gst::Element> + IsA<glib::object::Object> + glib::value::SetValueOptional>(&self, video_filter: Option<&P>);
+
+    fn get_property_video_sink(&self) -> Option<gst::Element>;
+
+    fn set_property_video_sink<P: IsA<gst::Element> + IsA<glib::object::Object> + glib::value::SetValueOptional>(&self, video_sink: Option<&P>);
+
+    fn connect_property_audio_filter_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_audio_sink_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_mode_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_timeline_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_video_filter_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_video_sink_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+}
+
+impl<O: IsA<Pipeline> + IsA<glib::object::Object>> PipelineExt for O {
+    fn get_mode(&self) -> PipelineFlags {
+        unsafe {
+            from_glib(ffi::ges_pipeline_get_mode(self.to_glib_none().0))
+        }
+    }
+
+    fn get_thumbnail(&self, caps: &gst::Caps) -> Option<gst::Sample> {
+        unsafe {
+            from_glib_full(ffi::ges_pipeline_get_thumbnail(self.to_glib_none().0, caps.to_glib_none().0))
+        }
+    }
+
+    fn get_thumbnail_rgb24(&self, width: i32, height: i32) -> Option<gst::Sample> {
+        unsafe {
+            from_glib_full(ffi::ges_pipeline_get_thumbnail_rgb24(self.to_glib_none().0, width, height))
+        }
+    }
+
+    fn preview_get_audio_sink(&self) -> Option<gst::Element> {
+        unsafe {
+            from_glib_full(ffi::ges_pipeline_preview_get_audio_sink(self.to_glib_none().0))
+        }
+    }
+
+    fn preview_get_video_sink(&self) -> Option<gst::Element> {
+        unsafe {
+            from_glib_full(ffi::ges_pipeline_preview_get_video_sink(self.to_glib_none().0))
+        }
+    }
+
+    fn preview_set_audio_sink<P: IsA<gst::Element>>(&self, sink: &P) {
+        unsafe {
+            ffi::ges_pipeline_preview_set_audio_sink(self.to_glib_none().0, sink.to_glib_none().0);
+        }
+    }
+
+    fn preview_set_video_sink<P: IsA<gst::Element>>(&self, sink: &P) {
+        unsafe {
+            ffi::ges_pipeline_preview_set_video_sink(self.to_glib_none().0, sink.to_glib_none().0);
+        }
+    }
+
+    fn save_thumbnail(&self, width: i32, height: i32, format: &str, location: &str) -> Result<(), Error> {
+        unsafe {
+            let mut error = ptr::null_mut();
+            let _ = ffi::ges_pipeline_save_thumbnail(self.to_glib_none().0, width, height, format.to_glib_none().0, location.to_glib_none().0, &mut error);
+            if error.is_null() { Ok(()) } else { Err(from_glib_full(error)) }
+        }
+    }
+
+    fn set_mode(&self, mode: PipelineFlags) -> bool {
+        unsafe {
+            from_glib(ffi::ges_pipeline_set_mode(self.to_glib_none().0, mode.to_glib()))
+        }
+    }
+
+    fn set_render_settings<P: IsA<gst_pbutils::EncodingProfile>>(&self, output_uri: &str, profile: &P) -> bool {
+        unsafe {
+            from_glib(ffi::ges_pipeline_set_render_settings(self.to_glib_none().0, output_uri.to_glib_none().0, profile.to_glib_none().0))
+        }
+    }
+
+    fn set_timeline(&self, timeline: &Timeline) -> bool {
+        unsafe {
+            from_glib(ffi::ges_pipeline_set_timeline(self.to_glib_none().0, timeline.to_glib_full()))
+        }
+    }
+
+    fn get_property_audio_filter(&self) -> Option<gst::Element> {
+        unsafe {
+            let mut value = Value::from_type(<gst::Element as StaticType>::static_type());
+            gobject_ffi::g_object_get_property(self.to_glib_none().0, "audio-filter".to_glib_none().0, value.to_glib_none_mut().0);
+            value.get()
+        }
+    }
+
+    fn set_property_audio_filter<P: IsA<gst::Element> + IsA<glib::object::Object> + glib::value::SetValueOptional>(&self, audio_filter: Option<&P>) {
+        unsafe {
+            gobject_ffi::g_object_set_property(self.to_glib_none().0, "audio-filter".to_glib_none().0, Value::from(audio_filter).to_glib_none().0);
+        }
+    }
+
+    fn get_property_audio_sink(&self) -> Option<gst::Element> {
+        unsafe {
+            let mut value = Value::from_type(<gst::Element as StaticType>::static_type());
+            gobject_ffi::g_object_get_property(self.to_glib_none().0, "audio-sink".to_glib_none().0, value.to_glib_none_mut().0);
+            value.get()
+        }
+    }
+
+    fn set_property_audio_sink<P: IsA<gst::Element> + IsA<glib::object::Object> + glib::value::SetValueOptional>(&self, audio_sink: Option<&P>) {
+        unsafe {
+            gobject_ffi::g_object_set_property(self.to_glib_none().0, "audio-sink".to_glib_none().0, Value::from(audio_sink).to_glib_none().0);
+        }
+    }
+
+    fn get_property_timeline(&self) -> Option<Timeline> {
+        unsafe {
+            let mut value = Value::from_type(<Timeline as StaticType>::static_type());
+            gobject_ffi::g_object_get_property(self.to_glib_none().0, "timeline".to_glib_none().0, value.to_glib_none_mut().0);
+            value.get()
+        }
+    }
+
+    fn get_property_video_filter(&self) -> Option<gst::Element> {
+        unsafe {
+            let mut value = Value::from_type(<gst::Element as StaticType>::static_type());
+            gobject_ffi::g_object_get_property(self.to_glib_none().0, "video-filter".to_glib_none().0, value.to_glib_none_mut().0);
+            value.get()
+        }
+    }
+
+    fn set_property_video_filter<P: IsA<gst::Element> + IsA<glib::object::Object> + glib::value::SetValueOptional>(&self, video_filter: Option<&P>) {
+        unsafe {
+            gobject_ffi::g_object_set_property(self.to_glib_none().0, "video-filter".to_glib_none().0, Value::from(video_filter).to_glib_none().0);
+        }
+    }
+
+    fn get_property_video_sink(&self) -> Option<gst::Element> {
+        unsafe {
+            let mut value = Value::from_type(<gst::Element as StaticType>::static_type());
+            gobject_ffi::g_object_get_property(self.to_glib_none().0, "video-sink".to_glib_none().0, value.to_glib_none_mut().0);
+            value.get()
+        }
+    }
+
+    fn set_property_video_sink<P: IsA<gst::Element> + IsA<glib::object::Object> + glib::value::SetValueOptional>(&self, video_sink: Option<&P>) {
+        unsafe {
+            gobject_ffi::g_object_set_property(self.to_glib_none().0, "video-sink".to_glib_none().0, Value::from(video_sink).to_glib_none().0);
+        }
+    }
+
+    fn connect_property_audio_filter_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::audio-filter",
+                transmute(notify_audio_filter_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_audio_sink_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::audio-sink",
+                transmute(notify_audio_sink_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_mode_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::mode",
+                transmute(notify_mode_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_timeline_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::timeline",
+                transmute(notify_timeline_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_video_filter_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::video-filter",
+                transmute(notify_video_filter_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_video_sink_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::video-sink",
+                transmute(notify_video_sink_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+}
+
+unsafe extern "C" fn notify_audio_filter_trampoline<P>(this: *mut ffi::GESPipeline, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Pipeline> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Pipeline::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_audio_sink_trampoline<P>(this: *mut ffi::GESPipeline, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Pipeline> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Pipeline::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_mode_trampoline<P>(this: *mut ffi::GESPipeline, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Pipeline> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Pipeline::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_timeline_trampoline<P>(this: *mut ffi::GESPipeline, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Pipeline> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Pipeline::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_video_filter_trampoline<P>(this: *mut ffi::GESPipeline, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Pipeline> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Pipeline::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_video_sink_trampoline<P>(this: *mut ffi::GESPipeline, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Pipeline> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Pipeline::from_glib_borrow(this).downcast_unchecked())
+}
--- a/gstreamer-editing-services/src/auto/project.rs
+++ b/gstreamer-editing-services/src/auto/project.rs
@ -0,0 +1,265 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from gir-files (https://github.com/gtk-rs/gir-files)
+// DO NOT EDIT
+
+use Asset;
+use Error;
+use Timeline;
+use ffi;
+use glib;
+use glib::object::Downcast;
+use glib::object::IsA;
+use glib::signal::SignalHandlerId;
+use glib::signal::connect;
+use glib::translate::*;
+use glib_ffi;
+use gobject_ffi;
+use gst_pbutils;
+use libc;
+use std::boxed::Box as Box_;
+use std::mem;
+use std::mem::transmute;
+use std::ptr;
+
+glib_wrapper! {
+    pub struct Project(Object<ffi::GESProject, ffi::GESProjectClass>): Asset;
+
+    match fn {
+        get_type => || ffi::ges_project_get_type(),
+    }
+}
+
+impl Project {
+    pub fn new<'a, P: Into<Option<&'a str>>>(uri: P) -> Project {
+        assert_initialized_main_thread!();
+        let uri = uri.into();
+        let uri = uri.to_glib_none();
+        unsafe {
+            from_glib_full(ffi::ges_project_new(uri.0))
+        }
+    }
+}
+
+pub trait ProjectExt {
+    fn add_asset<P: IsA<Asset>>(&self, asset: &P) -> bool;
+
+    fn add_encoding_profile<P: IsA<gst_pbutils::EncodingProfile>>(&self, profile: &P) -> bool;
+
+    fn create_asset<'a, P: Into<Option<&'a str>>>(&self, id: P, extractable_type: glib::types::Type) -> bool;
+
+    fn create_asset_sync<'a, P: Into<Option<&'a str>>>(&self, id: P, extractable_type: glib::types::Type) -> Result<Option<Asset>, Error>;
+
+    fn get_asset(&self, id: &str, extractable_type: glib::types::Type) -> Option<Asset>;
+
+    fn get_loading_assets(&self) -> Vec<Asset>;
+
+    fn get_uri(&self) -> Option<String>;
+
+    fn list_assets(&self, filter: glib::types::Type) -> Vec<Asset>;
+
+    fn list_encoding_profiles(&self) -> Vec<gst_pbutils::EncodingProfile>;
+
+    fn load(&self, timeline: &Timeline) -> Result<(), Error>;
+
+    fn remove_asset<P: IsA<Asset>>(&self, asset: &P) -> bool;
+
+    fn save<'a, P: IsA<Asset> + 'a, Q: Into<Option<&'a P>>>(&self, timeline: &Timeline, uri: &str, formatter_asset: Q, overwrite: bool) -> Result<(), Error>;
+
+    fn connect_asset_added<F: Fn(&Self, &Asset) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_asset_loading<F: Fn(&Self, &Asset) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_asset_removed<F: Fn(&Self, &Asset) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_error_loading_asset<F: Fn(&Self, &Error, &str, glib::types::Type) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_loaded<F: Fn(&Self, &Timeline) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_missing_uri<F: Fn(&Self, &Error, &Asset) -> Option<String> + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_uri_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+}
+
+impl<O: IsA<Project> + IsA<glib::object::Object>> ProjectExt for O {
+    fn add_asset<P: IsA<Asset>>(&self, asset: &P) -> bool {
+        unsafe {
+            from_glib(ffi::ges_project_add_asset(self.to_glib_none().0, asset.to_glib_none().0))
+        }
+    }
+
+    fn add_encoding_profile<P: IsA<gst_pbutils::EncodingProfile>>(&self, profile: &P) -> bool {
+        unsafe {
+            from_glib(ffi::ges_project_add_encoding_profile(self.to_glib_none().0, profile.to_glib_none().0))
+        }
+    }
+
+    fn create_asset<'a, P: Into<Option<&'a str>>>(&self, id: P, extractable_type: glib::types::Type) -> bool {
+        let id = id.into();
+        let id = id.to_glib_none();
+        unsafe {
+            from_glib(ffi::ges_project_create_asset(self.to_glib_none().0, id.0, extractable_type.to_glib()))
+        }
+    }
+
+    fn create_asset_sync<'a, P: Into<Option<&'a str>>>(&self, id: P, extractable_type: glib::types::Type) -> Result<Option<Asset>, Error> {
+        let id = id.into();
+        let id = id.to_glib_none();
+        unsafe {
+            let mut error = ptr::null_mut();
+            let ret = ffi::ges_project_create_asset_sync(self.to_glib_none().0, id.0, extractable_type.to_glib(), &mut error);
+            if error.is_null() { Ok(from_glib_full(ret)) } else { Err(from_glib_full(error)) }
+        }
+    }
+
+    fn get_asset(&self, id: &str, extractable_type: glib::types::Type) -> Option<Asset> {
+        unsafe {
+            from_glib_full(ffi::ges_project_get_asset(self.to_glib_none().0, id.to_glib_none().0, extractable_type.to_glib()))
+        }
+    }
+
+    fn get_loading_assets(&self) -> Vec<Asset> {
+        unsafe {
+            FromGlibPtrContainer::from_glib_full(ffi::ges_project_get_loading_assets(self.to_glib_none().0))
+        }
+    }
+
+    fn get_uri(&self) -> Option<String> {
+        unsafe {
+            from_glib_full(ffi::ges_project_get_uri(self.to_glib_none().0))
+        }
+    }
+
+    fn list_assets(&self, filter: glib::types::Type) -> Vec<Asset> {
+        unsafe {
+            FromGlibPtrContainer::from_glib_full(ffi::ges_project_list_assets(self.to_glib_none().0, filter.to_glib()))
+        }
+    }
+
+    fn list_encoding_profiles(&self) -> Vec<gst_pbutils::EncodingProfile> {
+        unsafe {
+            FromGlibPtrContainer::from_glib_none(ffi::ges_project_list_encoding_profiles(self.to_glib_none().0))
+        }
+    }
+
+    fn load(&self, timeline: &Timeline) -> Result<(), Error> {
+        unsafe {
+            let mut error = ptr::null_mut();
+            let _ = ffi::ges_project_load(self.to_glib_none().0, timeline.to_glib_none().0, &mut error);
+            if error.is_null() { Ok(()) } else { Err(from_glib_full(error)) }
+        }
+    }
+
+    fn remove_asset<P: IsA<Asset>>(&self, asset: &P) -> bool {
+        unsafe {
+            from_glib(ffi::ges_project_remove_asset(self.to_glib_none().0, asset.to_glib_none().0))
+        }
+    }
+
+    fn save<'a, P: IsA<Asset> + 'a, Q: Into<Option<&'a P>>>(&self, timeline: &Timeline, uri: &str, formatter_asset: Q, overwrite: bool) -> Result<(), Error> {
+        let formatter_asset = formatter_asset.into();
+        let formatter_asset = formatter_asset.to_glib_none();
+        unsafe {
+            let mut error = ptr::null_mut();
+            let _ = ffi::ges_project_save(self.to_glib_none().0, timeline.to_glib_none().0, uri.to_glib_none().0, formatter_asset.0, overwrite.to_glib(), &mut error);
+            if error.is_null() { Ok(()) } else { Err(from_glib_full(error)) }
+        }
+    }
+
+    fn connect_asset_added<F: Fn(&Self, &Asset) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self, &Asset) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "asset-added",
+                transmute(asset_added_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_asset_loading<F: Fn(&Self, &Asset) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self, &Asset) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "asset-loading",
+                transmute(asset_loading_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_asset_removed<F: Fn(&Self, &Asset) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self, &Asset) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "asset-removed",
+                transmute(asset_removed_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_error_loading_asset<F: Fn(&Self, &Error, &str, glib::types::Type) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self, &Error, &str, glib::types::Type) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "error-loading-asset",
+                transmute(error_loading_asset_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_loaded<F: Fn(&Self, &Timeline) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self, &Timeline) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "loaded",
+                transmute(loaded_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_missing_uri<F: Fn(&Self, &Error, &Asset) -> Option<String> + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self, &Error, &Asset) -> Option<String> + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "missing-uri",
+                transmute(missing_uri_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_uri_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::uri",
+                transmute(notify_uri_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+}
+
+unsafe extern "C" fn asset_added_trampoline<P>(this: *mut ffi::GESProject, asset: *mut ffi::GESAsset, f: glib_ffi::gpointer)
+where P: IsA<Project> {
+    let f: &&(Fn(&P, &Asset) + 'static) = transmute(f);
+    f(&Project::from_glib_borrow(this).downcast_unchecked(), &from_glib_borrow(asset))
+}
+
+unsafe extern "C" fn asset_loading_trampoline<P>(this: *mut ffi::GESProject, asset: *mut ffi::GESAsset, f: glib_ffi::gpointer)
+where P: IsA<Project> {
+    let f: &&(Fn(&P, &Asset) + 'static) = transmute(f);
+    f(&Project::from_glib_borrow(this).downcast_unchecked(), &from_glib_borrow(asset))
+}
+
+unsafe extern "C" fn asset_removed_trampoline<P>(this: *mut ffi::GESProject, asset: *mut ffi::GESAsset, f: glib_ffi::gpointer)
+where P: IsA<Project> {
+    let f: &&(Fn(&P, &Asset) + 'static) = transmute(f);
+    f(&Project::from_glib_borrow(this).downcast_unchecked(), &from_glib_borrow(asset))
+}
+
+unsafe extern "C" fn error_loading_asset_trampoline<P>(this: *mut ffi::GESProject, error: *mut glib_ffi::GError, id: *mut libc::c_char, extractable_type: glib_ffi::GType, f: glib_ffi::gpointer)
+where P: IsA<Project> {
+    let f: &&(Fn(&P, &Error, &str, glib::types::Type) + 'static) = transmute(f);
+    f(&Project::from_glib_borrow(this).downcast_unchecked(), &from_glib_borrow(error), &String::from_glib_none(id), from_glib(extractable_type))
+}
+
+unsafe extern "C" fn loaded_trampoline<P>(this: *mut ffi::GESProject, timeline: *mut ffi::GESTimeline, f: glib_ffi::gpointer)
+where P: IsA<Project> {
+    let f: &&(Fn(&P, &Timeline) + 'static) = transmute(f);
+    f(&Project::from_glib_borrow(this).downcast_unchecked(), &from_glib_borrow(timeline))
+}
+
+unsafe extern "C" fn missing_uri_trampoline<P>(this: *mut ffi::GESProject, error: *mut glib_ffi::GError, wrong_asset: *mut ffi::GESAsset, f: glib_ffi::gpointer) -> *mut libc::c_char
+where P: IsA<Project> {
+    let f: &&(Fn(&P, &Error, &Asset) -> Option<String> + 'static) = transmute(f);
+    f(&Project::from_glib_borrow(this).downcast_unchecked(), &from_glib_borrow(error), &from_glib_borrow(wrong_asset)).to_glib_full()
+}
+
+unsafe extern "C" fn notify_uri_trampoline<P>(this: *mut ffi::GESProject, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Project> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Project::from_glib_borrow(this).downcast_unchecked())
+}
--- a/gstreamer-editing-services/src/auto/timeline.rs
+++ b/gstreamer-editing-services/src/auto/timeline.rs
@ -0,0 +1,460 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from gir-files (https://github.com/gtk-rs/gir-files)
+// DO NOT EDIT
+
+use Asset;
+use Error;
+use Extractable;
+use Group;
+use Layer;
+use TimelineElement;
+use Track;
+use TrackElement;
+use ffi;
+use glib;
+use glib::object::Downcast;
+use glib::object::IsA;
+use glib::signal::SignalHandlerId;
+use glib::signal::connect;
+use glib::translate::*;
+use glib_ffi;
+use gobject_ffi;
+use gst;
+use gst_ffi;
+use std::boxed::Box as Box_;
+use std::mem;
+use std::mem::transmute;
+use std::ptr;
+
+glib_wrapper! {
+    pub struct Timeline(Object<ffi::GESTimeline, ffi::GESTimelineClass>): [
+        gst::Element => gst_ffi::GstElement,
+        gst::Object => gst_ffi::GstObject,
+        Extractable,
+    ];
+
+    match fn {
+        get_type => || ffi::ges_timeline_get_type(),
+    }
+}
+
+impl Timeline {
+    pub fn new() -> Timeline {
+        assert_initialized_main_thread!();
+        unsafe {
+            from_glib_none(ffi::ges_timeline_new())
+        }
+    }
+
+    pub fn new_audio_video() -> Timeline {
+        assert_initialized_main_thread!();
+        unsafe {
+            from_glib_none(ffi::ges_timeline_new_audio_video())
+        }
+    }
+
+    pub fn new_from_uri(uri: &str) -> Result<Option<Timeline>, Error> {
+        assert_initialized_main_thread!();
+        unsafe {
+            let mut error = ptr::null_mut();
+            let ret = ffi::ges_timeline_new_from_uri(uri.to_glib_none().0, &mut error);
+            if error.is_null() { Ok(from_glib_none(ret)) } else { Err(from_glib_full(error)) }
+        }
+    }
+}
+
+impl Default for Timeline {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+pub trait TimelineExt {
+    fn add_layer(&self, layer: &Layer) -> bool;
+
+    fn add_track<P: IsA<Track>>(&self, track: &P) -> bool;
+
+    fn append_layer(&self) -> Layer;
+
+    fn commit(&self) -> bool;
+
+    fn commit_sync(&self) -> bool;
+
+    fn get_auto_transition(&self) -> bool;
+
+    fn get_duration(&self) -> gst::ClockTime;
+
+    fn get_element(&self, name: &str) -> Option<TimelineElement>;
+
+    fn get_groups(&self) -> Vec<Group>;
+
+    fn get_layer(&self, priority: u32) -> Option<Layer>;
+
+    fn get_layers(&self) -> Vec<Layer>;
+
+    fn get_pad_for_track<P: IsA<Track>>(&self, track: &P) -> Option<gst::Pad>;
+
+    fn get_snapping_distance(&self) -> gst::ClockTime;
+
+    fn get_track_for_pad<P: IsA<gst::Pad>>(&self, pad: &P) -> Option<Track>;
+
+    fn get_tracks(&self) -> Vec<Track>;
+
+    fn is_empty(&self) -> bool;
+
+    fn load_from_uri(&self, uri: &str) -> Result<(), Error>;
+
+    fn move_layer(&self, layer: &Layer, new_layer_priority: u32) -> bool;
+
+    fn paste_element<P: IsA<TimelineElement>>(&self, element: &P, position: gst::ClockTime, layer_priority: i32) -> Option<TimelineElement>;
+
+    fn remove_layer(&self, layer: &Layer) -> bool;
+
+    fn remove_track<P: IsA<Track>>(&self, track: &P) -> bool;
+
+    fn save_to_uri<'a, P: IsA<Asset> + 'a, Q: Into<Option<&'a P>>>(&self, uri: &str, formatter_asset: Q, overwrite: bool) -> Result<(), Error>;
+
+    fn set_auto_transition(&self, auto_transition: bool);
+
+    fn set_snapping_distance(&self, snapping_distance: gst::ClockTime);
+
+    fn connect_commited<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_group_added<F: Fn(&Self, &Group) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    //fn connect_group_removed<Unsupported or ignored types>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_layer_added<F: Fn(&Self, &Layer) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_layer_removed<F: Fn(&Self, &Layer) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    //fn connect_select_tracks_for_object<Unsupported or ignored types>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_snapping_ended<F: Fn(&Self, &TrackElement, &TrackElement, u64) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_snapping_started<F: Fn(&Self, &TrackElement, &TrackElement, u64) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_track_added<F: Fn(&Self, &Track) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_track_removed<F: Fn(&Self, &Track) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_auto_transition_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_duration_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_snapping_distance_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+}
+
+impl<O: IsA<Timeline> + IsA<glib::object::Object>> TimelineExt for O {
+    fn add_layer(&self, layer: &Layer) -> bool {
+        unsafe {
+            from_glib(ffi::ges_timeline_add_layer(self.to_glib_none().0, layer.to_glib_none().0))
+        }
+    }
+
+    fn add_track<P: IsA<Track>>(&self, track: &P) -> bool {
+        unsafe {
+            from_glib(ffi::ges_timeline_add_track(self.to_glib_none().0, track.to_glib_full()))
+        }
+    }
+
+    fn append_layer(&self) -> Layer {
+        unsafe {
+            from_glib_none(ffi::ges_timeline_append_layer(self.to_glib_none().0))
+        }
+    }
+
+    fn commit(&self) -> bool {
+        unsafe {
+            from_glib(ffi::ges_timeline_commit(self.to_glib_none().0))
+        }
+    }
+
+    fn commit_sync(&self) -> bool {
+        unsafe {
+            from_glib(ffi::ges_timeline_commit_sync(self.to_glib_none().0))
+        }
+    }
+
+    fn get_auto_transition(&self) -> bool {
+        unsafe {
+            from_glib(ffi::ges_timeline_get_auto_transition(self.to_glib_none().0))
+        }
+    }
+
+    fn get_duration(&self) -> gst::ClockTime {
+        unsafe {
+            from_glib(ffi::ges_timeline_get_duration(self.to_glib_none().0))
+        }
+    }
+
+    fn get_element(&self, name: &str) -> Option<TimelineElement> {
+        unsafe {
+            from_glib_full(ffi::ges_timeline_get_element(self.to_glib_none().0, name.to_glib_none().0))
+        }
+    }
+
+    fn get_groups(&self) -> Vec<Group> {
+        unsafe {
+            FromGlibPtrContainer::from_glib_none(ffi::ges_timeline_get_groups(self.to_glib_none().0))
+        }
+    }
+
+    fn get_layer(&self, priority: u32) -> Option<Layer> {
+        unsafe {
+            from_glib_full(ffi::ges_timeline_get_layer(self.to_glib_none().0, priority))
+        }
+    }
+
+    fn get_layers(&self) -> Vec<Layer> {
+        unsafe {
+            FromGlibPtrContainer::from_glib_full(ffi::ges_timeline_get_layers(self.to_glib_none().0))
+        }
+    }
+
+    fn get_pad_for_track<P: IsA<Track>>(&self, track: &P) -> Option<gst::Pad> {
+        unsafe {
+            from_glib_none(ffi::ges_timeline_get_pad_for_track(self.to_glib_none().0, track.to_glib_none().0))
+        }
+    }
+
+    fn get_snapping_distance(&self) -> gst::ClockTime {
+        unsafe {
+            from_glib(ffi::ges_timeline_get_snapping_distance(self.to_glib_none().0))
+        }
+    }
+
+    fn get_track_for_pad<P: IsA<gst::Pad>>(&self, pad: &P) -> Option<Track> {
+        unsafe {
+            from_glib_none(ffi::ges_timeline_get_track_for_pad(self.to_glib_none().0, pad.to_glib_none().0))
+        }
+    }
+
+    fn get_tracks(&self) -> Vec<Track> {
+        unsafe {
+            FromGlibPtrContainer::from_glib_full(ffi::ges_timeline_get_tracks(self.to_glib_none().0))
+        }
+    }
+
+    fn is_empty(&self) -> bool {
+        unsafe {
+            from_glib(ffi::ges_timeline_is_empty(self.to_glib_none().0))
+        }
+    }
+
+    fn load_from_uri(&self, uri: &str) -> Result<(), Error> {
+        unsafe {
+            let mut error = ptr::null_mut();
+            let _ = ffi::ges_timeline_load_from_uri(self.to_glib_none().0, uri.to_glib_none().0, &mut error);
+            if error.is_null() { Ok(()) } else { Err(from_glib_full(error)) }
+        }
+    }
+
+    fn move_layer(&self, layer: &Layer, new_layer_priority: u32) -> bool {
+        unsafe {
+            from_glib(ffi::ges_timeline_move_layer(self.to_glib_none().0, layer.to_glib_none().0, new_layer_priority))
+        }
+    }
+
+    fn paste_element<P: IsA<TimelineElement>>(&self, element: &P, position: gst::ClockTime, layer_priority: i32) -> Option<TimelineElement> {
+        unsafe {
+            from_glib_none(ffi::ges_timeline_paste_element(self.to_glib_none().0, element.to_glib_none().0, position.to_glib(), layer_priority))
+        }
+    }
+
+    fn remove_layer(&self, layer: &Layer) -> bool {
+        unsafe {
+            from_glib(ffi::ges_timeline_remove_layer(self.to_glib_none().0, layer.to_glib_none().0))
+        }
+    }
+
+    fn remove_track<P: IsA<Track>>(&self, track: &P) -> bool {
+        unsafe {
+            from_glib(ffi::ges_timeline_remove_track(self.to_glib_none().0, track.to_glib_none().0))
+        }
+    }
+
+    fn save_to_uri<'a, P: IsA<Asset> + 'a, Q: Into<Option<&'a P>>>(&self, uri: &str, formatter_asset: Q, overwrite: bool) -> Result<(), Error> {
+        let formatter_asset = formatter_asset.into();
+        let formatter_asset = formatter_asset.to_glib_none();
+        unsafe {
+            let mut error = ptr::null_mut();
+            let _ = ffi::ges_timeline_save_to_uri(self.to_glib_none().0, uri.to_glib_none().0, formatter_asset.0, overwrite.to_glib(), &mut error);
+            if error.is_null() { Ok(()) } else { Err(from_glib_full(error)) }
+        }
+    }
+
+    fn set_auto_transition(&self, auto_transition: bool) {
+        unsafe {
+            ffi::ges_timeline_set_auto_transition(self.to_glib_none().0, auto_transition.to_glib());
+        }
+    }
+
+    fn set_snapping_distance(&self, snapping_distance: gst::ClockTime) {
+        unsafe {
+            ffi::ges_timeline_set_snapping_distance(self.to_glib_none().0, snapping_distance.to_glib());
+        }
+    }
+
+    fn connect_commited<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "commited",
+                transmute(commited_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_group_added<F: Fn(&Self, &Group) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self, &Group) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "group-added",
+                transmute(group_added_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    //fn connect_group_removed<Unsupported or ignored types>(&self, f: F) -> SignalHandlerId {
+    //    Empty ctype children: *.PtrArray TypeId { ns_id: 1, id: 51 }
+    //}
+
+    fn connect_layer_added<F: Fn(&Self, &Layer) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self, &Layer) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "layer-added",
+                transmute(layer_added_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_layer_removed<F: Fn(&Self, &Layer) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self, &Layer) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "layer-removed",
+                transmute(layer_removed_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    //fn connect_select_tracks_for_object<Unsupported or ignored types>(&self, f: F) -> SignalHandlerId {
+    //    Empty ctype return value *.PtrArray TypeId { ns_id: 1, id: 16 }
+    //}
+
+    fn connect_snapping_ended<F: Fn(&Self, &TrackElement, &TrackElement, u64) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self, &TrackElement, &TrackElement, u64) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "snapping-ended",
+                transmute(snapping_ended_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_snapping_started<F: Fn(&Self, &TrackElement, &TrackElement, u64) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self, &TrackElement, &TrackElement, u64) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "snapping-started",
+                transmute(snapping_started_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_track_added<F: Fn(&Self, &Track) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self, &Track) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "track-added",
+                transmute(track_added_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_track_removed<F: Fn(&Self, &Track) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self, &Track) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "track-removed",
+                transmute(track_removed_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_auto_transition_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::auto-transition",
+                transmute(notify_auto_transition_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_duration_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::duration",
+                transmute(notify_duration_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_snapping_distance_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::snapping-distance",
+                transmute(notify_snapping_distance_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+}
+
+unsafe extern "C" fn commited_trampoline<P>(this: *mut ffi::GESTimeline, f: glib_ffi::gpointer)
+where P: IsA<Timeline> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Timeline::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn group_added_trampoline<P>(this: *mut ffi::GESTimeline, group: *mut ffi::GESGroup, f: glib_ffi::gpointer)
+where P: IsA<Timeline> {
+    let f: &&(Fn(&P, &Group) + 'static) = transmute(f);
+    f(&Timeline::from_glib_borrow(this).downcast_unchecked(), &from_glib_borrow(group))
+}
+
+unsafe extern "C" fn layer_added_trampoline<P>(this: *mut ffi::GESTimeline, layer: *mut ffi::GESLayer, f: glib_ffi::gpointer)
+where P: IsA<Timeline> {
+    let f: &&(Fn(&P, &Layer) + 'static) = transmute(f);
+    f(&Timeline::from_glib_borrow(this).downcast_unchecked(), &from_glib_borrow(layer))
+}
+
+unsafe extern "C" fn layer_removed_trampoline<P>(this: *mut ffi::GESTimeline, layer: *mut ffi::GESLayer, f: glib_ffi::gpointer)
+where P: IsA<Timeline> {
+    let f: &&(Fn(&P, &Layer) + 'static) = transmute(f);
+    f(&Timeline::from_glib_borrow(this).downcast_unchecked(), &from_glib_borrow(layer))
+}
+
+unsafe extern "C" fn snapping_ended_trampoline<P>(this: *mut ffi::GESTimeline, object: *mut ffi::GESTrackElement, p0: *mut ffi::GESTrackElement, p1: u64, f: glib_ffi::gpointer)
+where P: IsA<Timeline> {
+    let f: &&(Fn(&P, &TrackElement, &TrackElement, u64) + 'static) = transmute(f);
+    f(&Timeline::from_glib_borrow(this).downcast_unchecked(), &from_glib_borrow(object), &from_glib_borrow(p0), p1)
+}
+
+unsafe extern "C" fn snapping_started_trampoline<P>(this: *mut ffi::GESTimeline, object: *mut ffi::GESTrackElement, p0: *mut ffi::GESTrackElement, p1: u64, f: glib_ffi::gpointer)
+where P: IsA<Timeline> {
+    let f: &&(Fn(&P, &TrackElement, &TrackElement, u64) + 'static) = transmute(f);
+    f(&Timeline::from_glib_borrow(this).downcast_unchecked(), &from_glib_borrow(object), &from_glib_borrow(p0), p1)
+}
+
+unsafe extern "C" fn track_added_trampoline<P>(this: *mut ffi::GESTimeline, track: *mut ffi::GESTrack, f: glib_ffi::gpointer)
+where P: IsA<Timeline> {
+    let f: &&(Fn(&P, &Track) + 'static) = transmute(f);
+    f(&Timeline::from_glib_borrow(this).downcast_unchecked(), &from_glib_borrow(track))
+}
+
+unsafe extern "C" fn track_removed_trampoline<P>(this: *mut ffi::GESTimeline, track: *mut ffi::GESTrack, f: glib_ffi::gpointer)
+where P: IsA<Timeline> {
+    let f: &&(Fn(&P, &Track) + 'static) = transmute(f);
+    f(&Timeline::from_glib_borrow(this).downcast_unchecked(), &from_glib_borrow(track))
+}
+
+unsafe extern "C" fn notify_auto_transition_trampoline<P>(this: *mut ffi::GESTimeline, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Timeline> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Timeline::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_duration_trampoline<P>(this: *mut ffi::GESTimeline, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Timeline> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Timeline::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_snapping_distance_trampoline<P>(this: *mut ffi::GESTimeline, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Timeline> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Timeline::from_glib_borrow(this).downcast_unchecked())
+}
--- a/gstreamer-editing-services/src/auto/timeline_element.rs
+++ b/gstreamer-editing-services/src/auto/timeline_element.rs
@ -0,0 +1,495 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from gir-files (https://github.com/gtk-rs/gir-files)
+// DO NOT EDIT
+
+use Extractable;
+use Timeline;
+use TrackType;
+use ffi;
+use glib;
+use glib::StaticType;
+use glib::Value;
+use glib::object::Downcast;
+use glib::object::IsA;
+use glib::signal::SignalHandlerId;
+use glib::signal::connect;
+use glib::translate::*;
+use glib_ffi;
+use gobject_ffi;
+use gst;
+use std::boxed::Box as Box_;
+use std::mem;
+use std::mem::transmute;
+use std::ptr;
+
+glib_wrapper! {
+    pub struct TimelineElement(Object<ffi::GESTimelineElement, ffi::GESTimelineElementClass>): Extractable;
+
+    match fn {
+        get_type => || ffi::ges_timeline_element_get_type(),
+    }
+}
+
+pub trait TimelineElementExt {
+    //fn add_child_property<P: IsA</*Ignored*/glib::ParamSpec>, Q: IsA<glib::Object>>(&self, pspec: &P, child: &Q) -> bool;
+
+    fn copy(&self, deep: bool) -> Option<TimelineElement>;
+
+    //fn get_child_properties(&self, first_property_name: &str, : /*Unknown conversion*//*Unimplemented*/Fundamental: VarArgs);
+
+    //fn get_child_property(&self, property_name: &str, value: /*Ignored*/glib::Value) -> bool;
+
+    //fn get_child_property_by_pspec<P: IsA</*Ignored*/glib::ParamSpec>>(&self, pspec: &P, value: /*Ignored*/glib::Value);
+
+    //fn get_child_property_valist(&self, first_property_name: &str, var_args: /*Unknown conversion*//*Unimplemented*/Unsupported);
+
+    fn get_duration(&self) -> gst::ClockTime;
+
+    fn get_inpoint(&self) -> gst::ClockTime;
+
+    fn get_max_duration(&self) -> gst::ClockTime;
+
+    fn get_name(&self) -> Option<String>;
+
+    fn get_parent(&self) -> Option<TimelineElement>;
+
+    fn get_priority(&self) -> u32;
+
+    fn get_start(&self) -> gst::ClockTime;
+
+    fn get_timeline(&self) -> Option<Timeline>;
+
+    fn get_toplevel_parent(&self) -> Option<TimelineElement>;
+
+    fn get_track_types(&self) -> TrackType;
+
+    //fn list_children_properties(&self) -> /*Ignored*/Vec<glib::ParamSpec>;
+
+    //fn lookup_child(&self, prop_name: &str, pspec: /*Ignored*/glib::ParamSpec) -> Option<glib::Object>;
+
+    fn paste(&self, paste_position: gst::ClockTime) -> Option<TimelineElement>;
+
+    //fn remove_child_property<P: IsA</*Ignored*/glib::ParamSpec>>(&self, pspec: &P) -> bool;
+
+    fn ripple(&self, start: gst::ClockTime) -> bool;
+
+    fn ripple_end(&self, end: gst::ClockTime) -> bool;
+
+    fn roll_end(&self, end: gst::ClockTime) -> bool;
+
+    fn roll_start(&self, start: gst::ClockTime) -> bool;
+
+    //fn set_child_properties(&self, first_property_name: &str, : /*Unknown conversion*//*Unimplemented*/Fundamental: VarArgs);
+
+    //fn set_child_property(&self, property_name: &str, value: /*Ignored*/&mut glib::Value) -> bool;
+
+    //fn set_child_property_by_pspec<P: IsA</*Ignored*/glib::ParamSpec>>(&self, pspec: &P, value: /*Ignored*/&mut glib::Value);
+
+    //fn set_child_property_valist(&self, first_property_name: &str, var_args: /*Unknown conversion*//*Unimplemented*/Unsupported);
+
+    fn set_duration(&self, duration: gst::ClockTime);
+
+    fn set_inpoint(&self, inpoint: gst::ClockTime);
+
+    fn set_max_duration(&self, maxduration: gst::ClockTime);
+
+    fn set_name<'a, P: Into<Option<&'a str>>>(&self, name: P) -> bool;
+
+    fn set_parent<P: IsA<TimelineElement>>(&self, parent: &P) -> bool;
+
+    fn set_priority(&self, priority: u32);
+
+    fn set_start(&self, start: gst::ClockTime);
+
+    fn set_timeline(&self, timeline: &Timeline) -> bool;
+
+    fn trim(&self, start: gst::ClockTime) -> bool;
+
+    fn get_property_in_point(&self) -> u64;
+
+    fn set_property_in_point(&self, in_point: u64);
+
+    fn get_property_serialize(&self) -> bool;
+
+    fn set_property_serialize(&self, serialize: bool);
+
+    //fn connect_deep_notify<Unsupported or ignored types>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_duration_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_in_point_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_max_duration_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_name_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_parent_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_priority_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_serialize_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_start_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_timeline_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+}
+
+impl<O: IsA<TimelineElement> + IsA<glib::object::Object>> TimelineElementExt for O {
+    //fn add_child_property<P: IsA</*Ignored*/glib::ParamSpec>, Q: IsA<glib::Object>>(&self, pspec: &P, child: &Q) -> bool {
+    //    unsafe { TODO: call ffi::ges_timeline_element_add_child_property() }
+    //}
+
+    fn copy(&self, deep: bool) -> Option<TimelineElement> {
+        unsafe {
+            from_glib_none(ffi::ges_timeline_element_copy(self.to_glib_none().0, deep.to_glib()))
+        }
+    }
+
+    //fn get_child_properties(&self, first_property_name: &str, : /*Unknown conversion*//*Unimplemented*/Fundamental: VarArgs) {
+    //    unsafe { TODO: call ffi::ges_timeline_element_get_child_properties() }
+    //}
+
+    //fn get_child_property(&self, property_name: &str, value: /*Ignored*/glib::Value) -> bool {
+    //    unsafe { TODO: call ffi::ges_timeline_element_get_child_property() }
+    //}
+
+    //fn get_child_property_by_pspec<P: IsA</*Ignored*/glib::ParamSpec>>(&self, pspec: &P, value: /*Ignored*/glib::Value) {
+    //    unsafe { TODO: call ffi::ges_timeline_element_get_child_property_by_pspec() }
+    //}
+
+    //fn get_child_property_valist(&self, first_property_name: &str, var_args: /*Unknown conversion*//*Unimplemented*/Unsupported) {
+    //    unsafe { TODO: call ffi::ges_timeline_element_get_child_property_valist() }
+    //}
+
+    fn get_duration(&self) -> gst::ClockTime {
+        unsafe {
+            from_glib(ffi::ges_timeline_element_get_duration(self.to_glib_none().0))
+        }
+    }
+
+    fn get_inpoint(&self) -> gst::ClockTime {
+        unsafe {
+            from_glib(ffi::ges_timeline_element_get_inpoint(self.to_glib_none().0))
+        }
+    }
+
+    fn get_max_duration(&self) -> gst::ClockTime {
+        unsafe {
+            from_glib(ffi::ges_timeline_element_get_max_duration(self.to_glib_none().0))
+        }
+    }
+
+    fn get_name(&self) -> Option<String> {
+        unsafe {
+            from_glib_full(ffi::ges_timeline_element_get_name(self.to_glib_none().0))
+        }
+    }
+
+    fn get_parent(&self) -> Option<TimelineElement> {
+        unsafe {
+            from_glib_full(ffi::ges_timeline_element_get_parent(self.to_glib_none().0))
+        }
+    }
+
+    fn get_priority(&self) -> u32 {
+        unsafe {
+            ffi::ges_timeline_element_get_priority(self.to_glib_none().0)
+        }
+    }
+
+    fn get_start(&self) -> gst::ClockTime {
+        unsafe {
+            from_glib(ffi::ges_timeline_element_get_start(self.to_glib_none().0))
+        }
+    }
+
+    fn get_timeline(&self) -> Option<Timeline> {
+        unsafe {
+            from_glib_full(ffi::ges_timeline_element_get_timeline(self.to_glib_none().0))
+        }
+    }
+
+    fn get_toplevel_parent(&self) -> Option<TimelineElement> {
+        unsafe {
+            from_glib_full(ffi::ges_timeline_element_get_toplevel_parent(self.to_glib_none().0))
+        }
+    }
+
+    fn get_track_types(&self) -> TrackType {
+        unsafe {
+            from_glib(ffi::ges_timeline_element_get_track_types(self.to_glib_none().0))
+        }
+    }
+
+    //fn list_children_properties(&self) -> /*Ignored*/Vec<glib::ParamSpec> {
+    //    unsafe { TODO: call ffi::ges_timeline_element_list_children_properties() }
+    //}
+
+    //fn lookup_child(&self, prop_name: &str, pspec: /*Ignored*/glib::ParamSpec) -> Option<glib::Object> {
+    //    unsafe { TODO: call ffi::ges_timeline_element_lookup_child() }
+    //}
+
+    fn paste(&self, paste_position: gst::ClockTime) -> Option<TimelineElement> {
+        unsafe {
+            from_glib_none(ffi::ges_timeline_element_paste(self.to_glib_none().0, paste_position.to_glib()))
+        }
+    }
+
+    //fn remove_child_property<P: IsA</*Ignored*/glib::ParamSpec>>(&self, pspec: &P) -> bool {
+    //    unsafe { TODO: call ffi::ges_timeline_element_remove_child_property() }
+    //}
+
+    fn ripple(&self, start: gst::ClockTime) -> bool {
+        unsafe {
+            from_glib(ffi::ges_timeline_element_ripple(self.to_glib_none().0, start.to_glib()))
+        }
+    }
+
+    fn ripple_end(&self, end: gst::ClockTime) -> bool {
+        unsafe {
+            from_glib(ffi::ges_timeline_element_ripple_end(self.to_glib_none().0, end.to_glib()))
+        }
+    }
+
+    fn roll_end(&self, end: gst::ClockTime) -> bool {
+        unsafe {
+            from_glib(ffi::ges_timeline_element_roll_end(self.to_glib_none().0, end.to_glib()))
+        }
+    }
+
+    fn roll_start(&self, start: gst::ClockTime) -> bool {
+        unsafe {
+            from_glib(ffi::ges_timeline_element_roll_start(self.to_glib_none().0, start.to_glib()))
+        }
+    }
+
+    //fn set_child_properties(&self, first_property_name: &str, : /*Unknown conversion*//*Unimplemented*/Fundamental: VarArgs) {
+    //    unsafe { TODO: call ffi::ges_timeline_element_set_child_properties() }
+    //}
+
+    //fn set_child_property(&self, property_name: &str, value: /*Ignored*/&mut glib::Value) -> bool {
+    //    unsafe { TODO: call ffi::ges_timeline_element_set_child_property() }
+    //}
+
+    //fn set_child_property_by_pspec<P: IsA</*Ignored*/glib::ParamSpec>>(&self, pspec: &P, value: /*Ignored*/&mut glib::Value) {
+    //    unsafe { TODO: call ffi::ges_timeline_element_set_child_property_by_pspec() }
+    //}
+
+    //fn set_child_property_valist(&self, first_property_name: &str, var_args: /*Unknown conversion*//*Unimplemented*/Unsupported) {
+    //    unsafe { TODO: call ffi::ges_timeline_element_set_child_property_valist() }
+    //}
+
+    fn set_duration(&self, duration: gst::ClockTime) {
+        unsafe {
+            ffi::ges_timeline_element_set_duration(self.to_glib_none().0, duration.to_glib());
+        }
+    }
+
+    fn set_inpoint(&self, inpoint: gst::ClockTime) {
+        unsafe {
+            ffi::ges_timeline_element_set_inpoint(self.to_glib_none().0, inpoint.to_glib());
+        }
+    }
+
+    fn set_max_duration(&self, maxduration: gst::ClockTime) {
+        unsafe {
+            ffi::ges_timeline_element_set_max_duration(self.to_glib_none().0, maxduration.to_glib());
+        }
+    }
+
+    fn set_name<'a, P: Into<Option<&'a str>>>(&self, name: P) -> bool {
+        let name = name.into();
+        let name = name.to_glib_none();
+        unsafe {
+            from_glib(ffi::ges_timeline_element_set_name(self.to_glib_none().0, name.0))
+        }
+    }
+
+    fn set_parent<P: IsA<TimelineElement>>(&self, parent: &P) -> bool {
+        unsafe {
+            from_glib(ffi::ges_timeline_element_set_parent(self.to_glib_none().0, parent.to_glib_none().0))
+        }
+    }
+
+    fn set_priority(&self, priority: u32) {
+        unsafe {
+            ffi::ges_timeline_element_set_priority(self.to_glib_none().0, priority);
+        }
+    }
+
+    fn set_start(&self, start: gst::ClockTime) {
+        unsafe {
+            ffi::ges_timeline_element_set_start(self.to_glib_none().0, start.to_glib());
+        }
+    }
+
+    fn set_timeline(&self, timeline: &Timeline) -> bool {
+        unsafe {
+            from_glib(ffi::ges_timeline_element_set_timeline(self.to_glib_none().0, timeline.to_glib_none().0))
+        }
+    }
+
+    fn trim(&self, start: gst::ClockTime) -> bool {
+        unsafe {
+            from_glib(ffi::ges_timeline_element_trim(self.to_glib_none().0, start.to_glib()))
+        }
+    }
+
+    fn get_property_in_point(&self) -> u64 {
+        unsafe {
+            let mut value = Value::from_type(<u64 as StaticType>::static_type());
+            gobject_ffi::g_object_get_property(self.to_glib_none().0, "in-point".to_glib_none().0, value.to_glib_none_mut().0);
+            value.get().unwrap()
+        }
+    }
+
+    fn set_property_in_point(&self, in_point: u64) {
+        unsafe {
+            gobject_ffi::g_object_set_property(self.to_glib_none().0, "in-point".to_glib_none().0, Value::from(&in_point).to_glib_none().0);
+        }
+    }
+
+    fn get_property_serialize(&self) -> bool {
+        unsafe {
+            let mut value = Value::from_type(<bool as StaticType>::static_type());
+            gobject_ffi::g_object_get_property(self.to_glib_none().0, "serialize".to_glib_none().0, value.to_glib_none_mut().0);
+            value.get().unwrap()
+        }
+    }
+
+    fn set_property_serialize(&self, serialize: bool) {
+        unsafe {
+            gobject_ffi::g_object_set_property(self.to_glib_none().0, "serialize".to_glib_none().0, Value::from(&serialize).to_glib_none().0);
+        }
+    }
+
+    //fn connect_deep_notify<Unsupported or ignored types>(&self, f: F) -> SignalHandlerId {
+    //    Ignored prop: GObject.ParamSpec
+    //}
+
+    fn connect_property_duration_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::duration",
+                transmute(notify_duration_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_in_point_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::in-point",
+                transmute(notify_in_point_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_max_duration_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::max-duration",
+                transmute(notify_max_duration_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_name_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::name",
+                transmute(notify_name_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_parent_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::parent",
+                transmute(notify_parent_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_priority_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::priority",
+                transmute(notify_priority_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_serialize_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::serialize",
+                transmute(notify_serialize_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_start_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::start",
+                transmute(notify_start_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_timeline_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::timeline",
+                transmute(notify_timeline_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+}
+
+unsafe extern "C" fn notify_duration_trampoline<P>(this: *mut ffi::GESTimelineElement, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<TimelineElement> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&TimelineElement::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_in_point_trampoline<P>(this: *mut ffi::GESTimelineElement, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<TimelineElement> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&TimelineElement::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_max_duration_trampoline<P>(this: *mut ffi::GESTimelineElement, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<TimelineElement> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&TimelineElement::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_name_trampoline<P>(this: *mut ffi::GESTimelineElement, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<TimelineElement> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&TimelineElement::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_parent_trampoline<P>(this: *mut ffi::GESTimelineElement, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<TimelineElement> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&TimelineElement::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_priority_trampoline<P>(this: *mut ffi::GESTimelineElement, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<TimelineElement> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&TimelineElement::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_serialize_trampoline<P>(this: *mut ffi::GESTimelineElement, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<TimelineElement> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&TimelineElement::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_start_trampoline<P>(this: *mut ffi::GESTimelineElement, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<TimelineElement> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&TimelineElement::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_timeline_trampoline<P>(this: *mut ffi::GESTimelineElement, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<TimelineElement> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&TimelineElement::from_glib_borrow(this).downcast_unchecked())
+}
--- a/gstreamer-editing-services/src/auto/track.rs
+++ b/gstreamer-editing-services/src/auto/track.rs
@ -0,0 +1,300 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from gir-files (https://github.com/gtk-rs/gir-files)
+// DO NOT EDIT
+
+use Timeline;
+use TrackElement;
+use TrackType;
+use ffi;
+use glib;
+use glib::StaticType;
+use glib::Value;
+use glib::object::Downcast;
+use glib::object::IsA;
+use glib::signal::SignalHandlerId;
+use glib::signal::connect;
+use glib::translate::*;
+use glib_ffi;
+use gobject_ffi;
+use gst;
+use gst_ffi;
+use std::boxed::Box as Box_;
+use std::mem;
+use std::mem::transmute;
+use std::ptr;
+
+glib_wrapper! {
+    pub struct Track(Object<ffi::GESTrack, ffi::GESTrackClass>): [
+        gst::Element => gst_ffi::GstElement,
+        gst::Object => gst_ffi::GstObject,
+    ];
+
+    match fn {
+        get_type => || ffi::ges_track_get_type(),
+    }
+}
+
+impl Track {
+    pub fn new(type_: TrackType, caps: &gst::Caps) -> Track {
+        assert_initialized_main_thread!();
+        unsafe {
+            from_glib_none(ffi::ges_track_new(type_.to_glib(), caps.to_glib_full()))
+        }
+    }
+}
+
+pub trait TrackExt {
+    fn add_element<P: IsA<TrackElement>>(&self, object: &P) -> bool;
+
+    fn commit(&self) -> bool;
+
+    fn get_caps(&self) -> Option<gst::Caps>;
+
+    fn get_elements(&self) -> Vec<TrackElement>;
+
+    fn get_mixing(&self) -> bool;
+
+    fn get_timeline(&self) -> Option<Timeline>;
+
+    fn remove_element<P: IsA<TrackElement>>(&self, object: &P) -> bool;
+
+    //fn set_create_element_for_gap_func(&self, func: /*Unknown conversion*//*Unimplemented*/CreateElementForGapFunc);
+
+    fn set_mixing(&self, mixing: bool);
+
+    fn set_restriction_caps(&self, caps: &gst::Caps);
+
+    fn set_timeline(&self, timeline: &Timeline);
+
+    fn update_restriction_caps(&self, caps: &gst::Caps);
+
+    fn get_property_duration(&self) -> u64;
+
+    fn get_property_restriction_caps(&self) -> Option<gst::Caps>;
+
+    fn get_property_track_type(&self) -> TrackType;
+
+    fn connect_commited<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_track_element_added<F: Fn(&Self, &TrackElement) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_track_element_removed<F: Fn(&Self, &TrackElement) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_caps_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_duration_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_mixing_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_restriction_caps_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_track_type_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+}
+
+impl<O: IsA<Track> + IsA<glib::object::Object>> TrackExt for O {
+    fn add_element<P: IsA<TrackElement>>(&self, object: &P) -> bool {
+        unsafe {
+            from_glib(ffi::ges_track_add_element(self.to_glib_none().0, object.to_glib_none().0))
+        }
+    }
+
+    fn commit(&self) -> bool {
+        unsafe {
+            from_glib(ffi::ges_track_commit(self.to_glib_none().0))
+        }
+    }
+
+    fn get_caps(&self) -> Option<gst::Caps> {
+        unsafe {
+            from_glib_none(ffi::ges_track_get_caps(self.to_glib_none().0))
+        }
+    }
+
+    fn get_elements(&self) -> Vec<TrackElement> {
+        unsafe {
+            FromGlibPtrContainer::from_glib_full(ffi::ges_track_get_elements(self.to_glib_none().0))
+        }
+    }
+
+    fn get_mixing(&self) -> bool {
+        unsafe {
+            from_glib(ffi::ges_track_get_mixing(self.to_glib_none().0))
+        }
+    }
+
+    fn get_timeline(&self) -> Option<Timeline> {
+        unsafe {
+            from_glib_none(ffi::ges_track_get_timeline(self.to_glib_none().0))
+        }
+    }
+
+    fn remove_element<P: IsA<TrackElement>>(&self, object: &P) -> bool {
+        unsafe {
+            from_glib(ffi::ges_track_remove_element(self.to_glib_none().0, object.to_glib_none().0))
+        }
+    }
+
+    //fn set_create_element_for_gap_func(&self, func: /*Unknown conversion*//*Unimplemented*/CreateElementForGapFunc) {
+    //    unsafe { TODO: call ffi::ges_track_set_create_element_for_gap_func() }
+    //}
+
+    fn set_mixing(&self, mixing: bool) {
+        unsafe {
+            ffi::ges_track_set_mixing(self.to_glib_none().0, mixing.to_glib());
+        }
+    }
+
+    fn set_restriction_caps(&self, caps: &gst::Caps) {
+        unsafe {
+            ffi::ges_track_set_restriction_caps(self.to_glib_none().0, caps.to_glib_none().0);
+        }
+    }
+
+    fn set_timeline(&self, timeline: &Timeline) {
+        unsafe {
+            ffi::ges_track_set_timeline(self.to_glib_none().0, timeline.to_glib_none().0);
+        }
+    }
+
+    fn update_restriction_caps(&self, caps: &gst::Caps) {
+        unsafe {
+            ffi::ges_track_update_restriction_caps(self.to_glib_none().0, caps.to_glib_none().0);
+        }
+    }
+
+    fn get_property_duration(&self) -> u64 {
+        unsafe {
+            let mut value = Value::from_type(<u64 as StaticType>::static_type());
+            gobject_ffi::g_object_get_property(self.to_glib_none().0, "duration".to_glib_none().0, value.to_glib_none_mut().0);
+            value.get().unwrap()
+        }
+    }
+
+    fn get_property_restriction_caps(&self) -> Option<gst::Caps> {
+        unsafe {
+            let mut value = Value::from_type(<gst::Caps as StaticType>::static_type());
+            gobject_ffi::g_object_get_property(self.to_glib_none().0, "restriction-caps".to_glib_none().0, value.to_glib_none_mut().0);
+            value.get()
+        }
+    }
+
+    fn get_property_track_type(&self) -> TrackType {
+        unsafe {
+            let mut value = Value::from_type(<TrackType as StaticType>::static_type());
+            gobject_ffi::g_object_get_property(self.to_glib_none().0, "track-type".to_glib_none().0, value.to_glib_none_mut().0);
+            value.get().unwrap()
+        }
+    }
+
+    fn connect_commited<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "commited",
+                transmute(commited_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_track_element_added<F: Fn(&Self, &TrackElement) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self, &TrackElement) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "track-element-added",
+                transmute(track_element_added_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_track_element_removed<F: Fn(&Self, &TrackElement) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self, &TrackElement) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "track-element-removed",
+                transmute(track_element_removed_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_caps_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::caps",
+                transmute(notify_caps_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_duration_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::duration",
+                transmute(notify_duration_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_mixing_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::mixing",
+                transmute(notify_mixing_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_restriction_caps_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::restriction-caps",
+                transmute(notify_restriction_caps_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_track_type_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::track-type",
+                transmute(notify_track_type_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+}
+
+unsafe extern "C" fn commited_trampoline<P>(this: *mut ffi::GESTrack, f: glib_ffi::gpointer)
+where P: IsA<Track> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Track::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn track_element_added_trampoline<P>(this: *mut ffi::GESTrack, effect: *mut ffi::GESTrackElement, f: glib_ffi::gpointer)
+where P: IsA<Track> {
+    let f: &&(Fn(&P, &TrackElement) + 'static) = transmute(f);
+    f(&Track::from_glib_borrow(this).downcast_unchecked(), &from_glib_borrow(effect))
+}
+
+unsafe extern "C" fn track_element_removed_trampoline<P>(this: *mut ffi::GESTrack, effect: *mut ffi::GESTrackElement, f: glib_ffi::gpointer)
+where P: IsA<Track> {
+    let f: &&(Fn(&P, &TrackElement) + 'static) = transmute(f);
+    f(&Track::from_glib_borrow(this).downcast_unchecked(), &from_glib_borrow(effect))
+}
+
+unsafe extern "C" fn notify_caps_trampoline<P>(this: *mut ffi::GESTrack, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Track> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Track::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_duration_trampoline<P>(this: *mut ffi::GESTrack, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Track> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Track::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_mixing_trampoline<P>(this: *mut ffi::GESTrack, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Track> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Track::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_restriction_caps_trampoline<P>(this: *mut ffi::GESTrack, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Track> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Track::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_track_type_trampoline<P>(this: *mut ffi::GESTrack, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<Track> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&Track::from_glib_borrow(this).downcast_unchecked())
+}
--- a/gstreamer-editing-services/src/auto/track_element.rs
+++ b/gstreamer-editing-services/src/auto/track_element.rs
@ -0,0 +1,221 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from gir-files (https://github.com/gtk-rs/gir-files)
+// DO NOT EDIT
+
+use Edge;
+use EditMode;
+use Extractable;
+use Layer;
+use TimelineElement;
+use Track;
+use TrackType;
+use ffi;
+use glib;
+use glib::StaticType;
+use glib::Value;
+use glib::object::Downcast;
+use glib::object::IsA;
+use glib::signal::SignalHandlerId;
+use glib::signal::connect;
+use glib::translate::*;
+use glib_ffi;
+use gobject_ffi;
+use gst;
+use std::boxed::Box as Box_;
+use std::mem;
+use std::mem::transmute;
+use std::ptr;
+
+glib_wrapper! {
+    pub struct TrackElement(Object<ffi::GESTrackElement, ffi::GESTrackElementClass>): TimelineElement, Extractable;
+
+    match fn {
+        get_type => || ffi::ges_track_element_get_type(),
+    }
+}
+
+pub trait TrackElementExt {
+    fn add_children_props<P: IsA<gst::Element>>(&self, element: &P, wanted_categories: &[&str], blacklist: &[&str], whitelist: &[&str]);
+
+    fn edit(&self, layers: &[Layer], mode: EditMode, edge: Edge, position: u64) -> bool;
+
+    //fn get_all_control_bindings(&self) -> /*Unknown conversion*//*Unimplemented*/HashTable TypeId { ns_id: 0, id: 28 }/TypeId { ns_id: 6, id: 83 };
+
+    //fn get_control_binding(&self, property_name: &str) -> /*Ignored*/Option<gst::ControlBinding>;
+
+    fn get_element(&self) -> Option<gst::Element>;
+
+    fn get_gnlobject(&self) -> Option<gst::Element>;
+
+    fn get_nleobject(&self) -> Option<gst::Element>;
+
+    fn get_track(&self) -> Option<Track>;
+
+    fn get_track_type(&self) -> TrackType;
+
+    fn is_active(&self) -> bool;
+
+    //fn lookup_child(&self, prop_name: &str, pspec: /*Ignored*/glib::ParamSpec) -> Option<gst::Element>;
+
+    fn remove_control_binding(&self, property_name: &str) -> bool;
+
+    fn set_active(&self, active: bool) -> bool;
+
+    //fn set_control_source(&self, source: /*Ignored*/&gst::ControlSource, property_name: &str, binding_type: &str) -> bool;
+
+    fn set_track_type(&self, type_: TrackType);
+
+    fn get_property_active(&self) -> bool;
+
+    //fn connect_control_binding_added<Unsupported or ignored types>(&self, f: F) -> SignalHandlerId;
+
+    //fn connect_control_binding_removed<Unsupported or ignored types>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_active_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_track_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_track_type_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+}
+
+impl<O: IsA<TrackElement> + IsA<glib::object::Object>> TrackElementExt for O {
+    fn add_children_props<P: IsA<gst::Element>>(&self, element: &P, wanted_categories: &[&str], blacklist: &[&str], whitelist: &[&str]) {
+        unsafe {
+            ffi::ges_track_element_add_children_props(self.to_glib_none().0, element.to_glib_none().0, wanted_categories.to_glib_none().0, blacklist.to_glib_none().0, whitelist.to_glib_none().0);
+        }
+    }
+
+    fn edit(&self, layers: &[Layer], mode: EditMode, edge: Edge, position: u64) -> bool {
+        unsafe {
+            from_glib(ffi::ges_track_element_edit(self.to_glib_none().0, layers.to_glib_none().0, mode.to_glib(), edge.to_glib(), position))
+        }
+    }
+
+    //fn get_all_control_bindings(&self) -> /*Unknown conversion*//*Unimplemented*/HashTable TypeId { ns_id: 0, id: 28 }/TypeId { ns_id: 6, id: 83 } {
+    //    unsafe { TODO: call ffi::ges_track_element_get_all_control_bindings() }
+    //}
+
+    //fn get_control_binding(&self, property_name: &str) -> /*Ignored*/Option<gst::ControlBinding> {
+    //    unsafe { TODO: call ffi::ges_track_element_get_control_binding() }
+    //}
+
+    fn get_element(&self) -> Option<gst::Element> {
+        unsafe {
+            from_glib_none(ffi::ges_track_element_get_element(self.to_glib_none().0))
+        }
+    }
+
+    fn get_gnlobject(&self) -> Option<gst::Element> {
+        unsafe {
+            from_glib_none(ffi::ges_track_element_get_gnlobject(self.to_glib_none().0))
+        }
+    }
+
+    fn get_nleobject(&self) -> Option<gst::Element> {
+        unsafe {
+            from_glib_none(ffi::ges_track_element_get_nleobject(self.to_glib_none().0))
+        }
+    }
+
+    fn get_track(&self) -> Option<Track> {
+        unsafe {
+            from_glib_none(ffi::ges_track_element_get_track(self.to_glib_none().0))
+        }
+    }
+
+    fn get_track_type(&self) -> TrackType {
+        unsafe {
+            from_glib(ffi::ges_track_element_get_track_type(self.to_glib_none().0))
+        }
+    }
+
+    fn is_active(&self) -> bool {
+        unsafe {
+            from_glib(ffi::ges_track_element_is_active(self.to_glib_none().0))
+        }
+    }
+
+    //fn lookup_child(&self, prop_name: &str, pspec: /*Ignored*/glib::ParamSpec) -> Option<gst::Element> {
+    //    unsafe { TODO: call ffi::ges_track_element_lookup_child() }
+    //}
+
+    fn remove_control_binding(&self, property_name: &str) -> bool {
+        unsafe {
+            from_glib(ffi::ges_track_element_remove_control_binding(self.to_glib_none().0, property_name.to_glib_none().0))
+        }
+    }
+
+    fn set_active(&self, active: bool) -> bool {
+        unsafe {
+            from_glib(ffi::ges_track_element_set_active(self.to_glib_none().0, active.to_glib()))
+        }
+    }
+
+    //fn set_control_source(&self, source: /*Ignored*/&gst::ControlSource, property_name: &str, binding_type: &str) -> bool {
+    //    unsafe { TODO: call ffi::ges_track_element_set_control_source() }
+    //}
+
+    fn set_track_type(&self, type_: TrackType) {
+        unsafe {
+            ffi::ges_track_element_set_track_type(self.to_glib_none().0, type_.to_glib());
+        }
+    }
+
+    fn get_property_active(&self) -> bool {
+        unsafe {
+            let mut value = Value::from_type(<bool as StaticType>::static_type());
+            gobject_ffi::g_object_get_property(self.to_glib_none().0, "active".to_glib_none().0, value.to_glib_none_mut().0);
+            value.get().unwrap()
+        }
+    }
+
+    //fn connect_control_binding_added<Unsupported or ignored types>(&self, f: F) -> SignalHandlerId {
+    //    Ignored control_binding: Gst.ControlBinding
+    //}
+
+    //fn connect_control_binding_removed<Unsupported or ignored types>(&self, f: F) -> SignalHandlerId {
+    //    Ignored control_binding: Gst.ControlBinding
+    //}
+
+    fn connect_property_active_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::active",
+                transmute(notify_active_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_track_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::track",
+                transmute(notify_track_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_track_type_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::track-type",
+                transmute(notify_track_type_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+}
+
+unsafe extern "C" fn notify_active_trampoline<P>(this: *mut ffi::GESTrackElement, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<TrackElement> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&TrackElement::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_track_trampoline<P>(this: *mut ffi::GESTrackElement, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<TrackElement> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&TrackElement::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_track_type_trampoline<P>(this: *mut ffi::GESTrackElement, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<TrackElement> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&TrackElement::from_glib_borrow(this).downcast_unchecked())
+}
--- a/gstreamer-editing-services/src/auto/uri_clip.rs
+++ b/gstreamer-editing-services/src/auto/uri_clip.rs
@ -0,0 +1,168 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from gir-files (https://github.com/gtk-rs/gir-files)
+// DO NOT EDIT
+
+use Clip;
+use Container;
+use Extractable;
+use TimelineElement;
+use ffi;
+use glib;
+use glib::StaticType;
+use glib::Value;
+use glib::object::Downcast;
+use glib::object::IsA;
+use glib::signal::SignalHandlerId;
+use glib::signal::connect;
+use glib::translate::*;
+use glib_ffi;
+use gobject_ffi;
+use std::boxed::Box as Box_;
+use std::mem;
+use std::mem::transmute;
+use std::ptr;
+
+glib_wrapper! {
+    pub struct UriClip(Object<ffi::GESUriClip, ffi::GESUriClipClass>): Clip, Container, TimelineElement, Extractable;
+
+    match fn {
+        get_type => || ffi::ges_uri_clip_get_type(),
+    }
+}
+
+impl UriClip {
+    pub fn new(uri: &str) -> UriClip {
+        assert_initialized_main_thread!();
+        unsafe {
+            from_glib_none(ffi::ges_uri_clip_new(uri.to_glib_none().0))
+        }
+    }
+}
+
+pub trait UriClipExt {
+    fn get_uri(&self) -> Option<String>;
+
+    fn is_image(&self) -> bool;
+
+    fn is_muted(&self) -> bool;
+
+    fn set_is_image(&self, is_image: bool);
+
+    fn set_mute(&self, mute: bool);
+
+    fn get_property_is_image(&self) -> bool;
+
+    fn get_property_mute(&self) -> bool;
+
+    fn connect_property_is_image_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_mute_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_supported_formats_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+
+    fn connect_property_uri_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+}
+
+impl<O: IsA<UriClip> + IsA<glib::object::Object>> UriClipExt for O {
+    fn get_uri(&self) -> Option<String> {
+        unsafe {
+            from_glib_none(ffi::ges_uri_clip_get_uri(self.to_glib_none().0))
+        }
+    }
+
+    fn is_image(&self) -> bool {
+        unsafe {
+            from_glib(ffi::ges_uri_clip_is_image(self.to_glib_none().0))
+        }
+    }
+
+    fn is_muted(&self) -> bool {
+        unsafe {
+            from_glib(ffi::ges_uri_clip_is_muted(self.to_glib_none().0))
+        }
+    }
+
+    fn set_is_image(&self, is_image: bool) {
+        unsafe {
+            ffi::ges_uri_clip_set_is_image(self.to_glib_none().0, is_image.to_glib());
+        }
+    }
+
+    fn set_mute(&self, mute: bool) {
+        unsafe {
+            ffi::ges_uri_clip_set_mute(self.to_glib_none().0, mute.to_glib());
+        }
+    }
+
+    fn get_property_is_image(&self) -> bool {
+        unsafe {
+            let mut value = Value::from_type(<bool as StaticType>::static_type());
+            gobject_ffi::g_object_get_property(self.to_glib_none().0, "is-image".to_glib_none().0, value.to_glib_none_mut().0);
+            value.get().unwrap()
+        }
+    }
+
+    fn get_property_mute(&self) -> bool {
+        unsafe {
+            let mut value = Value::from_type(<bool as StaticType>::static_type());
+            gobject_ffi::g_object_get_property(self.to_glib_none().0, "mute".to_glib_none().0, value.to_glib_none_mut().0);
+            value.get().unwrap()
+        }
+    }
+
+    fn connect_property_is_image_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::is-image",
+                transmute(notify_is_image_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_mute_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::mute",
+                transmute(notify_mute_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_supported_formats_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::supported-formats",
+                transmute(notify_supported_formats_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+
+    fn connect_property_uri_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::uri",
+                transmute(notify_uri_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+}
+
+unsafe extern "C" fn notify_is_image_trampoline<P>(this: *mut ffi::GESUriClip, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<UriClip> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&UriClip::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_mute_trampoline<P>(this: *mut ffi::GESUriClip, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<UriClip> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&UriClip::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_supported_formats_trampoline<P>(this: *mut ffi::GESUriClip, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<UriClip> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&UriClip::from_glib_borrow(this).downcast_unchecked())
+}
+
+unsafe extern "C" fn notify_uri_trampoline<P>(this: *mut ffi::GESUriClip, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<UriClip> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&UriClip::from_glib_borrow(this).downcast_unchecked())
+}
--- a/gstreamer-editing-services/src/auto/uri_clip_asset.rs
+++ b/gstreamer-editing-services/src/auto/uri_clip_asset.rs
@ -0,0 +1,106 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from gir-files (https://github.com/gtk-rs/gir-files)
+// DO NOT EDIT
+
+use Asset;
+use Error;
+use UriSourceAsset;
+use ffi;
+use glib;
+use glib::Value;
+use glib::object::Downcast;
+use glib::object::IsA;
+use glib::signal::SignalHandlerId;
+use glib::signal::connect;
+use glib::translate::*;
+use glib_ffi;
+use gobject_ffi;
+use gst;
+use gst_pbutils;
+use std::boxed::Box as Box_;
+use std::mem;
+use std::mem::transmute;
+use std::ptr;
+
+glib_wrapper! {
+    pub struct UriClipAsset(Object<ffi::GESUriClipAsset, ffi::GESUriClipAssetClass>): Asset;
+
+    match fn {
+        get_type => || ffi::ges_uri_clip_asset_get_type(),
+    }
+}
+
+impl UriClipAsset {
+    //pub fn new<'a, P: Into<Option<&'a gio::Cancellable>>, Q: /*Unimplemented*/gio::AsyncReadyCallback>(uri: &str, cancellable: P, callback: Q) {
+    //    unsafe { TODO: call ffi::ges_uri_clip_asset_new() }
+    //}
+
+    pub fn request_sync(uri: &str) -> Result<Option<UriClipAsset>, Error> {
+        assert_initialized_main_thread!();
+        unsafe {
+            let mut error = ptr::null_mut();
+            let ret = ffi::ges_uri_clip_asset_request_sync(uri.to_glib_none().0, &mut error);
+            if error.is_null() { Ok(from_glib_none(ret)) } else { Err(from_glib_full(error)) }
+        }
+    }
+}
+
+pub trait UriClipAssetExt {
+    fn get_duration(&self) -> gst::ClockTime;
+
+    fn get_info(&self) -> Option<gst_pbutils::DiscovererInfo>;
+
+    fn get_stream_assets(&self) -> Vec<UriSourceAsset>;
+
+    fn is_image(&self) -> bool;
+
+    fn set_property_duration(&self, duration: u64);
+
+    fn connect_property_duration_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
+}
+
+impl<O: IsA<UriClipAsset> + IsA<glib::object::Object>> UriClipAssetExt for O {
+    fn get_duration(&self) -> gst::ClockTime {
+        unsafe {
+            from_glib(ffi::ges_uri_clip_asset_get_duration(self.to_glib_none().0))
+        }
+    }
+
+    fn get_info(&self) -> Option<gst_pbutils::DiscovererInfo> {
+        unsafe {
+            from_glib_none(ffi::ges_uri_clip_asset_get_info(const_override(self.to_glib_none().0)))
+        }
+    }
+
+    fn get_stream_assets(&self) -> Vec<UriSourceAsset> {
+        unsafe {
+            FromGlibPtrContainer::from_glib_none(ffi::ges_uri_clip_asset_get_stream_assets(self.to_glib_none().0))
+        }
+    }
+
+    fn is_image(&self) -> bool {
+        unsafe {
+            from_glib(ffi::ges_uri_clip_asset_is_image(self.to_glib_none().0))
+        }
+    }
+
+    fn set_property_duration(&self, duration: u64) {
+        unsafe {
+            gobject_ffi::g_object_set_property(self.to_glib_none().0, "duration".to_glib_none().0, Value::from(&duration).to_glib_none().0);
+        }
+    }
+
+    fn connect_property_duration_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
+        unsafe {
+            let f: Box_<Box_<Fn(&Self) + 'static>> = Box_::new(Box_::new(f));
+            connect(self.to_glib_none().0, "notify::duration",
+                transmute(notify_duration_trampoline::<Self> as usize), Box_::into_raw(f) as *mut _)
+        }
+    }
+}
+
+unsafe extern "C" fn notify_duration_trampoline<P>(this: *mut ffi::GESUriClipAsset, _param_spec: glib_ffi::gpointer, f: glib_ffi::gpointer)
+where P: IsA<UriClipAsset> {
+    let f: &&(Fn(&P) + 'static) = transmute(f);
+    f(&UriClipAsset::from_glib_borrow(this).downcast_unchecked())
+}
--- a/gstreamer-editing-services/src/auto/uri_source_asset.rs
+++ b/gstreamer-editing-services/src/auto/uri_source_asset.rs
@ -0,0 +1,50 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from gir-files (https://github.com/gtk-rs/gir-files)
+// DO NOT EDIT
+
+use Asset;
+use UriClipAsset;
+use ffi;
+use glib::object::IsA;
+use glib::translate::*;
+use glib_ffi;
+use gobject_ffi;
+use gst_pbutils;
+use std::mem;
+use std::ptr;
+
+glib_wrapper! {
+    pub struct UriSourceAsset(Object<ffi::GESUriSourceAsset, ffi::GESUriSourceAssetClass>): Asset;
+
+    match fn {
+        get_type => || ffi::ges_uri_source_asset_get_type(),
+    }
+}
+
+pub trait UriSourceAssetExt {
+    fn get_filesource_asset(&self) -> Option<UriClipAsset>;
+
+    fn get_stream_info(&self) -> Option<gst_pbutils::DiscovererStreamInfo>;
+
+    fn get_stream_uri(&self) -> Option<String>;
+}
+
+impl<O: IsA<UriSourceAsset>> UriSourceAssetExt for O {
+    fn get_filesource_asset(&self) -> Option<UriClipAsset> {
+        unsafe {
+            from_glib_none(ffi::ges_uri_source_asset_get_filesource_asset(self.to_glib_none().0))
+        }
+    }
+
+    fn get_stream_info(&self) -> Option<gst_pbutils::DiscovererStreamInfo> {
+        unsafe {
+            from_glib_none(ffi::ges_uri_source_asset_get_stream_info(self.to_glib_none().0))
+        }
+    }
+
+    fn get_stream_uri(&self) -> Option<String> {
+        unsafe {
+            from_glib_none(ffi::ges_uri_source_asset_get_stream_uri(self.to_glib_none().0))
+        }
+    }
+}
--- a/gstreamer-editing-services/src/auto/versions.txt
+++ b/gstreamer-editing-services/src/auto/versions.txt
@ -0,0 +1,2 @@
+Generated by gir (https://github.com/gtk-rs/gir @ f5fca82)
+from gir-files (https://github.com/gtk-rs/gir-files @ ???)
--- a/gstreamer-editing-services/src/lib.rs
+++ b/gstreamer-editing-services/src/lib.rs
@ -0,0 +1,90 @@
+// Copyright (C) 2018 Thibault Saunier <tsaunier@igalia.com>
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+extern crate libc;
+
+use std::sync::{Once, ONCE_INIT};
+
+extern crate gio_sys as gio_ffi;
+extern crate glib_sys as glib_ffi;
+extern crate gobject_sys as gobject_ffi;
+extern crate gstreamer as gst;
+extern crate gstreamer_base as gst_base;
+extern crate gstreamer_base_sys as gst_base_ffi;
+extern crate gstreamer_editing_services_sys as ffi;
+extern crate gstreamer_pbutils as gst_pbutils;
+extern crate gstreamer_pbutils_sys as gst_pbutils_ffi;
+extern crate gstreamer_sys as gst_ffi;
+
+use glib::translate::from_glib;
+
+#[macro_use]
+extern crate glib;
+extern crate gio;
+
+static GES_INIT: Once = ONCE_INIT;
+
+pub use glib::{
+    BoolError, Cast, Continue, Error, IsA, StaticType, ToValue, Type, TypedValue, Value,
+};
+
+pub fn init() -> Result<(), BoolError> {
+    if gst::init().is_err() {
+        return Err(BoolError("Could not initialize GStreamer."));
+    }
+
+    unsafe {
+        if from_glib(ffi::ges_init()) {
+            Ok(())
+        } else {
+            Err(BoolError("Could not initialize GES."))
+        }
+    }
+}
+
+pub unsafe fn deinit() {
+    ffi::ges_deinit();
+}
+
+macro_rules! assert_initialized_main_thread {
+    () => {
+        if unsafe { ::gst_ffi::gst_is_initialized() } != ::glib_ffi::GTRUE {
+            panic!("GStreamer has not been initialized. Call `gst::init` first.");
+        }
+        ::GES_INIT.call_once(|| {
+            unsafe { ::ffi::ges_init() };
+        });
+    };
+}
+
+macro_rules! skip_assert_initialized {
+    () => {};
+}
+
+#[cfg_attr(feature = "cargo-clippy", allow(unreadable_literal))]
+#[cfg_attr(feature = "cargo-clippy", allow(transmute_ptr_to_ref))]
+#[cfg_attr(feature = "cargo-clippy", allow(too_many_arguments))]
+#[cfg_attr(feature = "cargo-clippy", allow(match_same_arms))]
+mod auto;
+pub use auto::*;
+
+#[macro_use]
+extern crate bitflags;
+
+mod timeline_element;
+pub use timeline_element::TimelineElementExtManual;
+
+// Re-export all the traits in a prelude module, so that applications
+// can always "use gst::prelude::*" without getting conflicts
+pub mod prelude {
+    pub use glib::prelude::*;
+    pub use gst::prelude::*;
+    pub use timeline_element::TimelineElementExtManual;
+
+    pub use auto::traits::*;
+}
--- a/gstreamer-editing-services/src/timeline_element.rs
+++ b/gstreamer-editing-services/src/timeline_element.rs
@ -0,0 +1,66 @@
+// Copyright (C) 2018 Thibault Saunier <tsaunier@igalia.com>
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use ffi;
+use glib;
+use glib::object::IsA;
+use glib::translate::*;
+use std::ptr;
+use TimelineElement;
+
+pub trait TimelineElementExtManual {
+    fn get_child_property(&self, name: &str) -> Option<glib::Value>;
+    fn set_child_property(&self, name: &str, value: &glib::ToValue) -> Result<(), glib::BoolError>;
+}
+
+impl<O: IsA<TimelineElement>> TimelineElementExtManual for O {
+    fn get_child_property(&self, name: &str) -> Option<glib::Value> {
+        unsafe {
+            let found: bool = from_glib(ffi::ges_timeline_element_lookup_child(
+                self.to_glib_none().0,
+                name.to_glib_none().0,
+                ptr::null_mut(),
+                ptr::null_mut(),
+            ));
+            if !found {
+                return None;
+            }
+
+            let mut value = glib::Value::uninitialized();
+            ffi::ges_timeline_element_get_child_property(
+                self.to_glib_none().0,
+                name.to_glib_none().0,
+                value.to_glib_none_mut().0,
+            );
+            Some(value)
+        }
+    }
+
+    fn set_child_property(&self, name: &str, value: &glib::ToValue) -> Result<(), glib::BoolError> {
+        unsafe {
+            let found: bool = from_glib(ffi::ges_timeline_element_lookup_child(
+                self.to_glib_none().0,
+                name.to_glib_none().0,
+                ptr::null_mut(),
+                ptr::null_mut(),
+            ));
+            if !found {
+                return Err(glib::BoolError("Child property not found"));
+            }
+
+            let value = value.to_value();
+            ffi::ges_timeline_element_set_child_property(
+                self.to_glib_none().0,
+                name.to_glib_none().0,
+                value.to_glib_none().0,
+            );
+
+            Ok(())
+        }
+    }
+}