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EDIT: Fixed by pipewire 1.4.4
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Workaround: Someone on the mpv GitHub pointed out that there is an option for controlling the buffer size.
I added this to my ~/.config/mpv/mpv.conf
# (maybe temporary) Increase pipewire buffer size (milliseconds) to counter underruns
pipewire-buffer=50
After upgrading to testing/pipewire, if I try to play a music file or video with a sample rate of 48000 hz, I get a weird stutter/slowdown effect.
It only happens with the pipewire audio output driver of mpv.
Seems to only happen on my system if the audio has a sample rate of 48000 hz.
It doesn't happen with 44100 hz.
Example command:
mpv --ao=pipewire --no-config music.ogg
Reverting to pipewire 1:1.4.2-1 fixes the problem.
EDIT: Another important detail is if I open pavucontrol, the stutter disappears and the audio appears to play normally.
But as soon as I close it, the stuttering starts again.
EDIT: I bisected, and it seems that the offending commit is https://gitlab.freedesktop.org/pipewire … 8dc4615b34
EDIT: Upstream issue: https://gitlab.freedesktop.org/pipewire … ssues/4713
Last edited by SneakySnake (2025-05-30 11:24:26)
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A weird thing that works for me to counter the effects of this regression is to keep `pavucontrol` open in the background.
As long as `pavucontrol` is open, the buffer underruns don't occur.
I have no idea why this works though.
EDIT: Also, you can tell mpv to use a larger buffer size. See the EDIT at the top of the first message.
Last edited by SneakySnake (2025-05-23 17:21:28)
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