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** Changed in: gst-plugins-good
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/2056079

Title:
  Serious playback timing problems affecting GStreamer and other
  pulseaudio and pipewire audio clients

Status in gst-plugins-good:
  Fix Released
Status in PipeWire:
  Fix Released
Status in pulseaudio package in Ubuntu:
  Confirmed

Bug description:
  This is a request for a backport of an existing bug fix, present in
  the recent Pulseaudio version 17 release, to the outdated Pulseaudio
  16 releases in jammy - noble.

  Affects: Ubuntu 22.04.0 LTS and all later versions.

  The fix fixes an annoying start of playback timing bug that affects my
  own software package octave-psychtoolbox-3 (part of Ubuntu universe),
  see
  https://github.com/Psychtoolbox-3/Psychtoolbox-3/issues/814#issuecomment-1723827374
  which uses GStreamer for video and audio playback. Psychtoolbox is a
  very popular toolkit for neuroscience and related medical research,
  with Ubuntu as the recommended target distribution. It requires high
  reliability in audio and video presentation timing, so the bug
  described in the various links below is serious to our users.

  The bug also in the same way affects other media applications in
  Ubuntu which play back audio via the default (auto-plugged)
  pulseaudiosink GStreamer plugin. See GStreamer bug report
  https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/1735). The
  GStreamer bug turned out to be a pulseaudio client library bug (in
  libpulse.so.0).

  Any native pulseaudio client is affected, even if pipewire is used as
  desktop sound server in recent Ubuntu releases, given that many audio
  applications still access pipewire via its pulseaudio frontend
  (package pipewire-pulse). See pipewire bug
  https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/3399

  The bug in libpulse.so.0, reported against Pulseaudio 16 in
  https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/issues/1383 has
  been fixed for the Pulseaudio 17 release.

  See the following merge request for the following trivial one-liner
  patch that would need to be backported to Ubuntu's current
  implementation:

  https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/745/diffs

  I hoped that Pulseaudio 17 would be included in Debian in time for
  integration into Ubuntu 24.04-LTS, but apparently not much maintenance
  of pulseaudio is happening on the Debian side at the moment.

  Given that this bug affects all Ubuntu versions since Ubuntu
  22.04-LTS, I'd ask kindly for a backport, ideally for Pulseaudio
  15.99.1 in 22.04-LTS and Pulseaudio 16.1 in upcoming 24.04-LTS, but at
  least for the upcoming 24.04-LTS.

  Alternatively it would have been great to get Pulseaudio upgraded to
  version 17 for upcoming Ubuntu 22.04-LTS to fix many more bugs, but
  apparently that is too late now, according to
  https://answers.launchpad.net/ubuntu/+source/pulseaudio/+question/709476

  Thanks,
  -mario

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