78e7a45e6e
We also need to remap channels for the splitter and merger. Remember the port-config format and its channel layout. Internally, we use a canonical channel layout which is simply all channels sorted by id. Remap the channels accordingly. Fixes #445 |
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| doc | ||
| man | ||
| pipewire-alsa | ||
| pipewire-jack | ||
| pipewire-pulseaudio | ||
| po | ||
| spa | ||
| src | ||
| .cirrus.yml | ||
| .codespell-ignore | ||
| .editorconfig | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| _config.yml | ||
| autogen.sh | ||
| check_missing_headers.sh | ||
| CODE_OF_CONDUCT.md | ||
| config.h.meson | ||
| COPYING | ||
| INSTALL.md | ||
| LICENSE | ||
| Makefile.in | ||
| meson.build | ||
| meson_options.txt | ||
| NEWS | ||
| PROTOCOL | ||
| pw-uninstalled.sh | ||
| README.md | ||
| template.test.in | ||
PipeWire
PipeWire is a server and user space API to deal with multimedia pipelines. This includes:
- Making available sources of video (such as from a capture devices or application provided streams) and multiplexing this with clients.
- Accessing sources of video for consumption.
- Generating graphs for audio and video processing.
Nodes in the graph can be implemented as separate processes, communicating with sockets and exchanging multimedia content using fd passing.
Building and installation
The preferred way to install PipeWire is to install it with your distribution package system. This ensures PipeWire is integrated into the rest of your system for the best experience.
If you want to build and install PipeWire yourself, refer to install for instructions.
Usage
The most important purpose of PipeWire is to run your favorite apps.
Some application use the native PipeWire API, such as most compositors (gnome-shell, wayland, ..) to implement screen sharing. These apps will just work automatically.
Most audio applications can use either ALSA, JACK or PulseAudio as a backend. PipeWire provides support for all 3 backends. Depending on how your distribution has configured things this should just work automatically or with the provided scripts shown below.
PipeWire can use environment variables to control the behaviour of applications:
PIPEWIRE_DEBUG=<level>to increase the debug levelPIPEWIRE_LOG=<filename>to redirect log to filenamePIPEWIRE_LATENCY=<num/denom>to configure latency as a fraction. 10/1000 configures a 10ms latency. Usually this is expressed as a fraction of the samplerate, like 256/48000, which uses 256 samples at a samplerate of 48KHz for a latency of 5.33ms.PIPEWIRE_NODE=<id>to request a link to the specified node
Using tools
pw-cat can be used to play and record audio and midi. Use pw-cat -h to get
some more help. There are some aliases like pw-play and pw-record to make
things easier:
$ pw-play /home/wim/data/01.\ Firepower.wav
Running JACK applications
Depending on how the system was configured, your can either run PipeWire and JACK side-by-side or have PipeWire take over the functionality of JACK completely.
In dual mode, JACK apps will by default use the JACK server. To direct a JACK
app to PipeWire, you can use the pw-jack script like this:
$ pw-jack <appname>
If you replaced JACK with PipeWire completely, pw-jack does not have any
effect and can be omitted.
Running PulseAudio applications
PipeWire can run a PulseAudio compatible replacement server. You can't use both servers at the same time. Usually you package manager will make the server conflict so that you can only install one or the other.
PulseAudio application still use the regular PulseAudio client libraries and you don't need to to anything else than change the server implementation.
A successful swap of the server can be verified by checking the output of
pactl info
It should include the string:
...
Server Name: PulseAudio (on PipeWire 0.3.x)
...
Running ALSA applications
If the PipeWire alsa module is installed, it can be seen with
$ aplay -L
ALSA application can then use the pipewire: device to use PipeWire
as the audio system.
Running GStreamer applications
PipeWire includes 2 GStreamer elements called pipewiresrc and
pipewiresink. They can be used in pipelines such as this:
$ gst-launch-1.0 pipewiresrc ! videoconvert ! autovideosink
Or to play a beeping sound:
$ gst-launch-1.0 audiotestsrc ! pipewiresink
PipeWire provides a device monitor as well so that:
$ gst-device-monitor-1.0
Shows the PipeWire devices and applications like cheese will automatically use the PipeWire video source when possible.
Inspecting the PipeWire state
There is currently no native graphical tool to inspect the PipeWire graph
but we recommend to use one of the excellent JACK tools, such as Carla,
catia, qjackctl,... You will not be able to see all features like the video
ports but it is a good start.
pw-mon dumps and monitors the state of the PipeWire daemon.
pw-dot can dump a graph of the pipeline, check out the help for
how to do this.
There is a more complicated tool to inspect the state of the server
with pw-cli. This tools can be used interactively or it can execute
single commands like this to get the server information:
$ pw-cli info 0
Documentation
Find tutorials and design documentation here.
The (incomplete) autogenerated API docs are here.
Contributing
PipeWire is Free Software and is developed in the open. It is licensed under the MIT license.
Contributors are encouraged to submit merge requests or file bugs on gitlab.
Join us on IRC at #pipewire on Freenode.
We adhere to the Contributor Covenant for our code of conduct.