this post was submitted on 28 Oct 2023
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20
MPV dropping frames and audio (lemmy.cafe)
submitted 1 year ago by [email protected] to c/[email protected]
6 comments fedilink hide all child comments
 

I've tried searching around and stuff but I couldn't find a working solution

Background: I am running Arch Linux on a Raspberry Pi, mainly as a media player.

When I run MPV, it seems to drop frames (1-2 per second). Visually, nothing looks wrong so I am fine with that.

The issue is that after playing for some duration, the audio will just disappear. I would then need to pause the video for a while or seek backwards for the audio to come back (sometimes it just comes back on its own when I leave it playing too). I suspect it may be due to the dropped frames or maybe it's due to insufficient system resource.

Could someone help suggest some config changes which may help with the issue? I am totally fine with the visual dropped frames, I just want to fix the audio issue.

This is my config.

input-ipc-server=/tmp/mpvsocket
ao=pipewire
volume=120
demuxer-readahead-secs=3                                
cache=yes
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[–] djtech 2 points 1 year ago (1 children)

Try running top and reply with the CPU usage while you are losing buffers.

Being a RPi, it might just be a performance issue.

[–] [email protected] 1 points 1 year ago (1 children)

Yea, it seems to be using 200% CPU. But I have vo=gpu though, so I'd thought the GPU would've taken some of the load.

If I am strapped for CPU resources, how do I make it so that MPV buffer or something instead of dropping the audio when this happens? Cause it is strange the even though the visuals are acceptable, it is the audio that fails before the video

[–] djtech 1 points 1 year ago (1 children)

If you want to use an OpenGL backend, see https://github.com/mpv-player/mpv/issues/4080

NOTE: I never used mpv, so i'm not really an expert; but please post the logs that are printed to the console when you launch mpv from the console.

[–] [email protected] 1 points 1 year ago

Tried the settings on the GitHub, doesn't seem to work, and it also made the stuttering worse

opengl-pbo=yes
opengl-early-flush=no.
video-sync=display-resample

ok, here you go

https://pastebin.com/uPc5S1LU

[–] [email protected] 1 points 1 year ago (1 children)

For me, mpv writes a bunch of debugging info to stderr when playing something. Have you seen this output? Can you try running it from the command-line (if you haven't already)?