Not working the linking of appsrc

This commit is contained in:
Rafael Caricio 2021-12-29 18:10:51 +01:00
parent d2e5b71389
commit 75ea4729ba
Signed by: rafaelcaricio
GPG key ID: 3C86DBCE8E93C947
3 changed files with 71 additions and 46 deletions

1
Cargo.lock generated
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@ -743,6 +743,7 @@ name = "webvtt"
version = "0.1.0" version = "0.1.0"
dependencies = [ dependencies = [
"anyhow", "anyhow",
"glib",
"gst-plugin-closedcaption", "gst-plugin-closedcaption",
"gstreamer", "gstreamer",
"gstreamer-app", "gstreamer-app",

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@ -7,6 +7,7 @@ edition = "2021"
rust-version = "1.56" rust-version = "1.56"
[dependencies] [dependencies]
glib = { git = "https://github.com/gtk-rs/gtk-rs-core" }
gst = { package = "gstreamer", git = "https://gitlab.freedesktop.org/gstreamer/gstreamer-rs", features = ["v1_18"] } gst = { package = "gstreamer", git = "https://gitlab.freedesktop.org/gstreamer/gstreamer-rs", features = ["v1_18"] }
gst-app = { package = "gstreamer-app", git = "https://gitlab.freedesktop.org/gstreamer/gstreamer-rs" } gst-app = { package = "gstreamer-app", git = "https://gitlab.freedesktop.org/gstreamer/gstreamer-rs" }
gst-plugin-closedcaption = { path = "../../gst-plugins-rs/video/closedcaption" } # git = "https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs" } gst-plugin-closedcaption = { path = "../../gst-plugins-rs/video/closedcaption" } # git = "https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs" }

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@ -9,30 +9,81 @@ fn main() -> Result<(), Error> {
// TODO: create a video source with X buffers and burn the captions in the video feed using the captions tooling // TODO: create a video source with X buffers and burn the captions in the video feed using the captions tooling
let pipeline = gst::parse_launch( let pipeline = gst::parse_launch(
"videotestsrc num-buffers=1800 ! video/x-raw,width=1280,height=720,framerate=30/1 ! glimagesink" "cccombiner name=ccc ! cea608overlay ! autovideosink \
// "cccombiner name=ccc ! cea608overlay ! autovideosink \ videotestsrc num-buffers=1800 ! video/x-raw,width=1280,height=720,framerate=30/1 ! queue ! ccc.sink \
// videotestsrc num-buffers=1800 ! video/x-raw,width=1280,height=720,framerate=30/1 ! queue ! ccc.sink \ tttocea608 name=converter ! queue ! ccc.caption",
// appsrc name=text-src ! tttocea608 ! queue ! ccc.caption",
)? )?
.downcast::<gst::Pipeline>() .downcast::<gst::Pipeline>()
.expect("Expected a gst::Pipeline"); .expect("Expected a gst::Pipeline");
// let text_src = pipeline.by_name("text-src") let text_src = gst::ElementFactory::make("appsrc", Some("text-src")).unwrap();
// .unwrap() text_src.set_property("is-live", true);
// .downcast::<gst_app::AppSrc>() text_src.set_property("caps",
// .unwrap(); &gst::Caps::builder("text/x-raw")
// text_src.set_is_live(true); .field("format", "utf8")
// text_src.set_caps(Some( .build(),
// &gst::Caps::builder("text/x-raw") );
// .field("format", "utf8") pipeline.add(&text_src).expect("Failed to add elements to pipeline");
// .build(),
// )); let converter = pipeline.by_name("converter").unwrap();
text_src.link_pads(Some("src"), &converter, Some("sink")).expect("Failed to link elements");
println!("Starting pipeline.."); println!("Starting pipeline..");
main_loop(pipeline) main_loop(pipeline)
} }
fn main_loop(pipeline: gst::Pipeline) -> Result<(), Error> {
let main_loop = glib::MainLoop::new(None, false);
pipeline.set_state(gst::State::Playing)?;
let bus = pipeline.bus().unwrap();
bus.add_watch({
let main_loop = main_loop.clone();
move |_, msg| {
use gst::MessageView;
let main_loop = &main_loop;
match msg.view() {
MessageView::Eos(..) => main_loop.quit(),
MessageView::Error(err) => {
println!(
"Error from {:?}: {} ({:?})",
err.src().map(|s| s.path_string()),
err.error(),
err.debug()
);
main_loop.quit();
}
_ => (),
};
glib::Continue(true)
}
})
.expect("Failed to add bus watch");
let pipeline_weak = pipeline.downgrade();
let timeout_id = glib::timeout_add_local(std::time::Duration::from_secs(10), move || {
let pipeline = match pipeline_weak.upgrade() {
Some(pipeline) => pipeline,
None => return glib::Continue(true),
};
push_buffer(&pipeline);
glib::Continue(true)
});
main_loop.run();
pipeline.set_state(gst::State::Null)?;
timeout_id.remove();
bus.remove_watch().unwrap();
Ok(())
}
fn push_buffer(pipeline: &gst::Pipeline) { fn push_buffer(pipeline: &gst::Pipeline) {
let src = pipeline let src = pipeline
.by_name("text-src") .by_name("text-src")
@ -40,44 +91,16 @@ fn push_buffer(pipeline: &gst::Pipeline) {
.downcast::<gst_app::AppSrc>() .downcast::<gst_app::AppSrc>()
.unwrap(); .unwrap();
let timestamp = pipeline.current_clock_time().unwrap() + gst::ClockTime::from_seconds(1); let timestamp = pipeline.query_position::<gst::ClockTime>().unwrap();
println!("Trying to publish text buffer NOW! - {}", timestamp.display());
let text = "Nice story, bro!1".to_string(); let text = "Nice story, bro!1".to_string();
let mut buffer = gst::Buffer::from_slice(text); let mut buffer = gst::Buffer::from_mut_slice(text.into_bytes());
{ {
let buffer = buffer.get_mut().unwrap(); let buffer = buffer.get_mut().unwrap();
buffer.set_pts(timestamp); buffer.set_pts(timestamp);
buffer.set_duration(gst::ClockTime::from_seconds(10)); buffer.set_duration(gst::ClockTime::from_seconds(10));
buffer.set_flags(gst::BufferFlags::DELTA_UNIT);
} }
src.push_buffer(buffer).unwrap(); src.push_buffer(buffer).unwrap();
}
fn main_loop(pipeline: gst::Pipeline) -> Result<(), Error> {
// let main_loop = glib::MainLoop::new(None, false);
pipeline.set_state(gst::State::Playing)?;
let bus = pipeline.bus().unwrap();
for msg in bus.iter_timed(gst::ClockTime::NONE) {
use gst::MessageView;
match msg.view() {
MessageView::Eos(..) => break,
MessageView::Error(err) => {
println!(
"Error from {:?}: {} ({:?})",
msg.src().map(|s| s.path_string()),
err.error(),
err.debug()
);
break;
}
_ => (),
}
}
pipeline.set_state(gst::State::Null)?;
Ok(())
} }