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PipeWire Under The Hood

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Linux

  • PipeWire Under The Hood

    The PipeWire project is slowly getting popular as it matures. Its documentation is still relatively sparse but is gradually growing. However, it’s always a good idea to have people from outside the project try to grasp and explain it to others in their own words, reiterating ideas, seeing them from their own perspective.

    In a previous posts I went over the generic audio stack on Unix and had a section mentioning PipeWire. Unfortunately, because at the time I didn’t find enough docs and couldn’t wrap my head around some concepts, I think I didn’t do justice to the project and might have even confused some parts.
    In this post I’ll try to explain PipeWire in the most simple way possible, to make it accessible to others that want to start following this cool new project but that don’t know where to start. It’s especially important to do this to open the door for more people to join in and follow the current development, which is happening at a fast pace.

  • PipeWire, The Newest Audio Kid On The Linux Block | Hackaday

    Raise your hand if you remember when PulseAudio was famous for breaking audio on Linux for everyone. For quite a few years, the standard answer for any audio problem on Linux was to uninstall PulseAudio, and just use ALSA. It’s probably the case that a number of distros switched to Pulse before it was quite ready. My experience was that after a couple years of fixing bugs, the experience got to be quite stable and useful. PulseAudio brought some really nice features to Linux, like moving sound streams between devices and dynamically resampling streams as needed.

    The other side of the Linux audio coin is JACK. If you’ve used Ardour, or done much with Firewire audio interfaces, you’re probably familiar with the JACK Audio Connection Kit — recursive acronyms are fun. JACK lets you almost arbitrarily route audio streams, and is very much intended for a professional audio audience.

    You may wonder if there is any way to use PulseAudio and JACK together. Yes, but it’s just a bit of a pain, to get the PulseAudio plugin to work with JACK. For example, all of the Pulse streams get mixed together, and show up as a single device on the JACK graph, so you can’t route them around or treat them seapartely.

  • Louis: PipeWire under the hood [LWN.net]

    For those wanting lots of grungy details about how the PipeWire system works, this blog entry from Patrick Louis should be of interest.

Red Hat / Fedora To Focus On Driving New Linux Video Improvement

  • Red Hat / Fedora To Focus On Driving New Linux Video Improvements Around PipeWire

    PipeWire from the start was designed around handling the needs of both audio and video streams on Linux. While PipeWire is already in use for screencasting/recording under Wayland and working with Flatpak'ed applications, recently much of PipeWire's focus has been on addressing the use-cases of JACK and PulseAudio on the sound side. Now that the audio support is in quite good shape, Red Hat engineers are back to focusing on improvements to the video support.

    As part of bolstering the Linux multimedia stack, Red Hat is going to be working on a fresh round of video feature work to PipeWire led by its founder Wim Taymans. In particular, the area they will be focusing on is improving the video capture support on Linux.

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