mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-09 05:38:58 +00:00
First, just installing certifi doesn't install the ca-cert in the right location. The `Install Certificates.command` script also symlinks the openssl cert.pem to the certifi ca cert file Second, we can make it more likely that users will notice this if we make it a warning. If we ever get a bug report about this despite these measures, we can try to make this an error. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2707>
476 lines
16 KiB
Markdown
476 lines
16 KiB
Markdown
# GStreamer
|
|
|
|
This is GStreamer, a framework for streaming media.
|
|
|
|
## Where to start
|
|
|
|
We have a website at
|
|
|
|
https://gstreamer.freedesktop.org
|
|
|
|
Our documentation, including tutorials, API reference and FAQ can be found at
|
|
|
|
https://gstreamer.freedesktop.org/documentation/
|
|
|
|
You can subscribe to our mailing lists:
|
|
|
|
https://lists.freedesktop.org/mailman/listinfo/gstreamer-announce
|
|
|
|
https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
|
|
|
|
We track bugs, feature requests and merge requests (patches) in GitLab at
|
|
|
|
https://gitlab.freedesktop.org/gstreamer/
|
|
|
|
You can join us on IRC - #gstreamer on irc.oftc.net
|
|
|
|
This repository contains all official modules supported by the GStreamer
|
|
community which can be found in the `subprojects/` directory.
|
|
|
|
## Getting started
|
|
|
|
### Install git and python 3.5+
|
|
|
|
If you're on Linux, you probably already have these. On macOS, you can use the
|
|
[official Python installer](https://www.python.org/downloads/mac-osx/).
|
|
|
|
You can find [instructions for Windows below](#windows-prerequisites-setup).
|
|
|
|
### Install meson and ninja
|
|
|
|
Meson 0.59 or newer is required.
|
|
|
|
On Linux and macOS you can get meson through your package manager or using:
|
|
|
|
$ pip3 install --user meson
|
|
|
|
This will install meson into `~/.local/bin` which may or may not be included
|
|
automatically in your PATH by default.
|
|
|
|
You should get `ninja` using your package manager or download the [official
|
|
release](https://github.com/ninja-build/ninja/releases) and put the `ninja`
|
|
binary in your PATH.
|
|
|
|
You can find [instructions for Windows below](#windows-prerequisites-setup).
|
|
|
|
|
|
On macOS, you might need to execute "Install Certificates.command" from the
|
|
Python folder in the user Applications folder:
|
|
|
|
```
|
|
$ /Applications/Python\ 3.*/Install\ Certificates.command
|
|
```
|
|
|
|
Otherwise you will get this error when downloading meson wraps:
|
|
|
|
```
|
|
urllib.error.URLError: urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed
|
|
```
|
|
|
|
### Build GStreamer and its modules
|
|
|
|
You can get all GStreamer built running:
|
|
|
|
```
|
|
meson builddir
|
|
ninja -C builddir
|
|
```
|
|
|
|
This will automatically create the `build` directory and build everything
|
|
inside it.
|
|
|
|
NOTE: On Windows, you *must* run this from [inside the Visual Studio command
|
|
prompt](#running-meson-on-windows) of the appropriate architecture and version.
|
|
|
|
### External dependencies
|
|
|
|
All mandatory dependencies of GStreamer are included as [meson subprojects](https://mesonbuild.com/Subprojects.html):
|
|
libintl, zlib, libffi, glib. Some optional dependencies are also included as
|
|
subprojects, such as ffmpeg, x264, json-glib, graphene, openh264, orc, etc.
|
|
|
|
Mandatory dependencies will be automatically built if meson cannot find them on
|
|
your system using pkg-config. The same is true for optional dependencies that
|
|
are included as subprojects. You can find a full list by looking at the
|
|
`subprojects` directory.
|
|
|
|
Plugins that need optional dependencies that aren't included can only be built
|
|
if they are provided by the system. Instructions on how to build some common
|
|
ones such as Qt5/QML are listed below. If you do not know how to provide an
|
|
optional dependency needed by a plugin, you should use [Cerbero](https://gitlab.freedesktop.org/gstreamer/cerbero/#description)
|
|
which handles this for you automatically.
|
|
|
|
Plugins will be automatically enabled if possible, but you can ensure that
|
|
a particular plugin (especially if it has external dependencies) is built by
|
|
enabling the gstreamer repository that ships it and the plugin inside it. For
|
|
example, to enable the Qt5 plugin in the gst-plugins-good repository, you need
|
|
to run meson as follows:
|
|
|
|
```
|
|
meson -Dgood=enabled -Dgst-plugins-good:qt5=enabled builddir
|
|
```
|
|
|
|
This will cause Meson to error out if the plugin could not be enabled. You can
|
|
also flip the default and disable all plugins except those explicitly enabled
|
|
like so:
|
|
|
|
```
|
|
meson -Dauto_features=disabled -Dgstreamer:tools=enabled -Dbad=enabled -Dgst-plugins-bad:openh264=enabled
|
|
```
|
|
|
|
This will disable all optional features and then enable the `openh264` plugin
|
|
and the tools that ship with the core gstreamer repository: `gst-inspect-1.0`,
|
|
`gst-launch-1.0`, etc. As usual, you can change these values on a builddir that
|
|
has already been setup with `meson configure -Doption=value`.
|
|
|
|
### Building the Qt5 QML plugin
|
|
|
|
If `qmake` is not in `PATH` and pkgconfig files are not available, you can
|
|
point the `QMAKE` env var to the Qt5 installation of your choosing before
|
|
running `meson` as shown above.
|
|
|
|
The plugin will be automatically enabled if possible, but you can ensure that
|
|
it is built by passing `-Dgood=enabled -Dgst-plugins-good:qt5=enabled` to `meson`.
|
|
|
|
### Building the Intel MSDK plugin
|
|
|
|
On Linux, you need to have development files for `libmfx` installed. On
|
|
Windows, if you have the [Intel Media SDK](https://software.intel.com/en-us/media-sdk),
|
|
it will set the `INTELMEDIASDKROOT` environment variable, which will be used by
|
|
the build files to find `libmfx`.
|
|
|
|
The plugin will be automatically enabled if possible, but you can ensure it by
|
|
passing `-Dbad=enabled -Dgst-plugins-bad:msdk=enabled` to `meson`.
|
|
|
|
### Building plugins with (A)GPL-licensed dependencies
|
|
|
|
Some plugins have GPL- or AGPL-licensed dependencies and will only be built
|
|
if you have explicitly opted in to allow (A)GPL-licensed dependencies by
|
|
passing `-Dgpl=enabled` to Meson.
|
|
|
|
List of plugins with (A)GPL-licensed dependencies (non-exhaustive) in gst-plugins-bad:
|
|
- dts (DTS audio decoder plugin)
|
|
- faad (Free AAC audio decoder plugin)
|
|
- iqa (Image quality assessment plugin based on dssim-c)
|
|
- mpeg2enc (MPEG-2 video encoder plugin)
|
|
- mplex (audio/video multiplexer plugin)
|
|
- ofa (Open Fingerprint Architecture library plugin)
|
|
- resindvd (Resin DVD playback plugin)
|
|
- x265 (HEVC/H.265 video encoder plugin)
|
|
|
|
List of plugins with (A)GPL-licensed dependencies (non-exhaustive) in gst-plugins-ugly:
|
|
- a52dec (Dolby Digital (AC-3) audio decoder plugin)
|
|
- cdio (CD audio source plugin based on libcdio)
|
|
- dvdread (DVD video source plugin based on libdvdread)
|
|
- mpeg2dec (MPEG-2 video decoder plugin based on libmpeg2)
|
|
- sidplay (Commodore 64 audio decoder plugin based on libsidplay)
|
|
- x264 (H.264 video encoder plugin based on libx264)
|
|
|
|
### Static build
|
|
|
|
Since *1.18.0* when doing a static build using `--default-library=static`, a
|
|
shared library `gstreamer-full-1.0` will be produced and includes all enabled
|
|
GStreamer plugins and libraries. A list of libraries that needs to be exposed in
|
|
`gstreamer-full-1.0` ABI can be set using `gst-full-libraries` option. glib-2.0,
|
|
gobject-2.0 and gstreamer-1.0 are always included.
|
|
|
|
```
|
|
meson --default-library=static -Dgst-full-libraries=app,video builddir
|
|
```
|
|
|
|
GStreamer *1.18* requires applications using gstreamer-full-1.0 to initialize
|
|
static plugins by calling `gst_init_static_plugins()` after `gst_init()`. That
|
|
function is defined in `gst/gstinitstaticplugins.h` header file.
|
|
|
|
Since *1.20.0* `gst_init_static_plugins()` is called automatically by
|
|
`gst_init()` and applications must not call it manually any more. The header
|
|
file has been removed from public API.
|
|
|
|
One can use the `gst-full-version-script` option to pass a
|
|
[version script](https://www.gnu.org/software/gnulib/manual/html_node/LD-Version-Scripts.html)
|
|
to the linker. This can be used to control the exact symbols that are exported by
|
|
the gstreamer-full library, allowing the linker to garbage collect unused code
|
|
and so reduce the total library size. A default script `gstreamer-full-default.map`
|
|
declares only glib/gstreamer symbols as public.
|
|
|
|
One can use the `gst-full-plugins` option to pass a list of plugins to be registered
|
|
in the gstreamer-full library. The default value is '*' which means that all the plugins selected
|
|
during the build process will be registered statically. An empty value will prevent any plugins to
|
|
be registered.
|
|
|
|
One can select a specific set of features with `gst-full-elements`, `gst-full-typefind-functions`, `gst-full-device-providers` or `gst-full-dynamic-types` to select specific feature from a plugin.
|
|
When a feature has been listed in one of those options, the other features from its plugin will no longer be automatically included, even if the plugin is listed in `gst-full-plugins`.
|
|
|
|
The user must insure that all selected plugins and features (element, typefind, etc.) have been
|
|
enabled during the build configuration.
|
|
|
|
To register features, the syntax is the following:
|
|
plugins are separated by ';' and features from a plugin starts after ':' and are ',' separated.
|
|
|
|
As an example:
|
|
* `-Dgst-full-plugins=coreelements;playback;typefindfunctions;alsa;pbtypes`: enable only `coreelements`, `playback`, `typefindfunctions`, `alsa`, `pbtypes` plugins.
|
|
* `-Dgst-full-elements=coreelements:filesrc,fakesink,identity;alsa:alsasrc`: enable only `filesrc`, `identity` and `fakesink` elements from `coreelements` and `alsasrc` element from `alsa` plugin.
|
|
* `-Dgst-full-typefind-functions=typefindfunctions:wav,flv`: enable only typefind func `wav` and `flv` from `typefindfunctions`
|
|
* `-Dgst-full-device-providers=alsa:alsadeviceprovider`: enable `alsadeviceprovider` from `alsa`.
|
|
* `-Dgst-full-dynamic-types=pbtypes:video_multiview_flagset`: enable `video_multiview_flagset` from `pbtypes
|
|
|
|
All features from the `playback` plugin will be enabled and the other plugins will be restricted to the specific features requested.
|
|
|
|
All the selected features will be registered into a dedicated `NULL` plugin name.
|
|
|
|
This will cause the features/plugins that are not registered to not be included in the final gstreamer-full library.
|
|
|
|
This is an experimental feature, backward incompatible changes could still be
|
|
made in the future.
|
|
|
|
# Development environment
|
|
|
|
## Development environment target
|
|
|
|
GStreamer also contains a special `devenv` target that lets you enter an
|
|
development environment where you will be able to work on GStreamer
|
|
easily. You can get into that environment running:
|
|
|
|
```
|
|
ninja -C builddir devenv
|
|
```
|
|
|
|
If your operating system handles symlinks, built modules source code will be
|
|
available at the root for example GStreamer core will be in
|
|
`gstreamer/`. Otherwise they will be present in `subprojects/`. You can simply
|
|
hack in there and to rebuild you just need to rerun `ninja -C builddir`.
|
|
|
|
NOTE: In the development environment, a fully usable prefix is also configured
|
|
in `gstreamer/prefix` where you can install any extra dependency/project.
|
|
|
|
An external script can be run in development environment with:
|
|
|
|
```
|
|
./gst-env.py external_script.sh
|
|
```
|
|
|
|
For more extensive documentation about the development environment go to [the
|
|
documentation](https://gstreamer.freedesktop.org/documentation/installing/building-from-source-using-meson.html).
|
|
|
|
## Custom subprojects
|
|
|
|
We also added a meson option, `custom_subprojects`, that allows the user
|
|
to provide a comma-separated list of subprojects that should be built
|
|
alongside the default ones.
|
|
|
|
To use it:
|
|
|
|
```
|
|
cd subprojects
|
|
git clone my_subproject
|
|
cd ../build
|
|
rm -rf * && meson .. -Dcustom_subprojects=my_subproject
|
|
ninja
|
|
```
|
|
|
|
## Run tests
|
|
|
|
You can easily run the test of all the components:
|
|
|
|
```
|
|
meson test -C build
|
|
```
|
|
|
|
To list all available tests:
|
|
|
|
```
|
|
meson test -C builddir --list
|
|
```
|
|
|
|
To run all the tests of a specific component:
|
|
|
|
```
|
|
meson test -C builddir --suite gst-plugins-base
|
|
```
|
|
|
|
Or to run a specific test file:
|
|
|
|
```
|
|
meson test -C builddir --suite gstreamer gst_gstbuffer
|
|
```
|
|
|
|
Run a specific test from a specific test file:
|
|
|
|
```
|
|
GST_CHECKS=test_subbuffer meson test -C builddir --suite gstreamer gst_gstbuffer
|
|
```
|
|
|
|
## Optional Installation
|
|
|
|
You can also install everything that is built into a predetermined prefix like
|
|
so:
|
|
|
|
```
|
|
meson --prefix=/path/to/install/prefix builddir
|
|
ninja -C builddir
|
|
meson install -C builddir
|
|
```
|
|
|
|
Note that the installed files have `RPATH` stripped, so you will need to set
|
|
`LD_LIBRARY_PATH`, `DYLD_LIBRARY_PATH`, or `PATH` as appropriate for your
|
|
platform for things to work.
|
|
|
|
|
|
## Add information about GStreamer development environment in your prompt line
|
|
|
|
### Bash prompt
|
|
|
|
We automatically handle `bash` and set `$PS1` accordingly.
|
|
|
|
If the automatic `$PS1` override is not desired (maybe you have a fancy custom
|
|
prompt), set the `$GST_BUILD_DISABLE_PS1_OVERRIDE` environment variable to
|
|
`TRUE` and use `$GST_ENV` when setting the custom prompt, for example with a
|
|
snippet like the following:
|
|
|
|
```bash
|
|
...
|
|
if [[ -n "${GST_ENV-}" ]];
|
|
then
|
|
PS1+="[ ${GST_ENV} ]"
|
|
fi
|
|
...
|
|
```
|
|
|
|
### Using powerline
|
|
|
|
In your powerline theme configuration file (by default in
|
|
`{POWERLINE INSTALLATION DIR}/config_files/themes/shell/default.json`)
|
|
you should add a new environment segment as follow:
|
|
|
|
```
|
|
{
|
|
"function": "powerline.segments.common.env.environment",
|
|
"args": { "variable": "GST_ENV" },
|
|
"priority": 50
|
|
},
|
|
```
|
|
|
|
## Windows Prerequisites Setup
|
|
|
|
On Windows, some of the components may require special care.
|
|
|
|
### Git for Windows
|
|
|
|
Use the [Git for Windows](https://gitforwindows.org/) installer. It will
|
|
install a `bash` prompt with basic shell utils and up-to-date git binaries.
|
|
|
|
During installation, when prompted about `PATH`, you should select the
|
|
following option:
|
|
|
|
![Select "Git from the command line and also from 3rd-party software"](/data/images/git-installer-PATH.png)
|
|
|
|
### Python 3.5+ on Windows
|
|
|
|
Use the [official Python installer](https://www.python.org/downloads/windows/).
|
|
You must ensure that Python is installed into `PATH`:
|
|
|
|
![Enable Add Python to PATH, then click Customize Installation](/data/images/py-installer-page1.png)
|
|
|
|
You may also want to customize the installation and install it into
|
|
a system-wide location such as `C:\PythonXY`, but this is not required.
|
|
|
|
### Ninja on Windows
|
|
|
|
The easiest way to install Ninja on Windows is with `pip3`, which will download
|
|
the compiled binary and place it into the `Scripts` directory inside your
|
|
Python installation:
|
|
|
|
```
|
|
pip3 install ninja
|
|
```
|
|
|
|
You can also download the [official release](https://github.com/ninja-build/ninja/releases)
|
|
and place it into `PATH`.
|
|
|
|
### Meson on Windows
|
|
|
|
**IMPORTANT**: Do not use the Meson MSI installer since it is experimental and known to not
|
|
work with `GStreamer`.
|
|
|
|
You can use `pip3` to install Meson, same as Ninja above:
|
|
|
|
```
|
|
pip3 install meson
|
|
```
|
|
|
|
Note that Meson is written entirely in Python, so you can also run it as-is
|
|
from the [git repository](https://github.com/mesonbuild/meson/) if you want to
|
|
use the latest master branch for some reason.
|
|
|
|
### Running Meson on Windows
|
|
|
|
At present, to build with Visual Studio, you need to run Meson from inside the
|
|
VS 2019 command prompt. Press `Start`, and search for `VS 2019`, and click on
|
|
`x64 Native Tools Command Prompt for VS 2019`, or a prompt named similar to
|
|
that:
|
|
|
|
![x64 Native Tools Command Prompt for VS 2019](/data/images/vs-2019-dev-prompt.png)
|
|
|
|
**ARM64 native only**: Since Visual Studio might not install dedicated command
|
|
prompt for native ARM64 build, you might need to run `vcvarsx86_arm64.bat` on CMD.
|
|
Please refer to [this document](https://docs.microsoft.com/en-us/cpp/build/building-on-the-command-line?view=vs-2019#developer_command_file_locations)
|
|
|
|
### Setup a mingw/wine based development environment on linux
|
|
|
|
#### Install wine and mingw
|
|
|
|
##### On fedora x64
|
|
|
|
``` sh
|
|
sudo dnf install mingw64-gcc mingw64-gcc-c++ mingw64-pkg-config mingw64-winpthreads wine
|
|
```
|
|
|
|
FIXME: Figure out what needs to be installed on other distros
|
|
|
|
#### Get meson from git
|
|
|
|
This simplifies the process and allows us to use the cross files
|
|
defined in meson itself.
|
|
|
|
``` sh
|
|
git clone https://github.com/mesonbuild/meson.git
|
|
```
|
|
|
|
#### Build and install
|
|
|
|
```
|
|
BUILDDIR=$PWD/winebuild/
|
|
export WINEPREFIX=$BUILDDIR/wine-prefix/ && mkdir -p $WINEPREFIX
|
|
# Setting the prefix is mandatory as it is used to setup symlinks within the development environment
|
|
meson/meson.py $BUILDDIR --cross-file meson/cross/linux-mingw-w64-64bit.txt -Dgst-plugins-bad:vulkan=disabled -Dorc:gtk_doc=disabled --prefix=$BUILDDIR/wininstall/ -Djson-glib:gtk_doc=disabled
|
|
meson/meson.py install -C $BUILDDIR/
|
|
```
|
|
|
|
> __NOTE__: You should use `meson install -C $BUILDDIR` each time you make a change
|
|
> instead of the usual `ninja -C build` as this is not in the development environment.
|
|
|
|
#### The development environment
|
|
|
|
You can get into the development environment the usual way:
|
|
|
|
```
|
|
ninja -C $BUILDDIR/ devenv
|
|
```
|
|
|
|
Alternatively, if you'd rather not start a shell in your workflow, you
|
|
can mutate the current environment into a suitable state like so:
|
|
|
|
```
|
|
gst-env.py --only-environment
|
|
```
|
|
|
|
This will print output suitable for an sh-compatible `eval` function,
|
|
just like `ssh-agent -s`.
|
|
|
|
After setting up [binfmt] to use wine for windows binaries,
|
|
you can run GStreamer tools under wine by running:
|
|
|
|
```
|
|
gst-launch-1.0.exe videotestsrc ! glimagesink
|
|
```
|
|
|
|
[binfmt]: http://man7.org/linux/man-pages/man5/binfmt.d.5.html
|