Comment 4 for bug 1931890

Revision history for this message
Heinz Assmus (tuxtester) wrote : Re: [Bug 1931890] Re: Problem with 3D Render Engine in VAAPI

During a running mp4 video in Intel graphics i965 (Ubuntu 18.04 Unity,
Ubuntu 20.04 MATE), mpv and vlc loose video frames (hardware
accelerated) when switching to another workscreen in Compiz and outputs
stuttering scaled videos (plug-in "scale" with overview "initiate window
selection for all windows") whereas gstreamer-based (1.18) Video players
(e.g. parole) do not have this problem.

The warning message (mpv) and error message (vlc) are then:

mpv:
Audio/Video desynchronisation detected! Possible reasons include too slow
hardware, temporary CPU spikes, broken drivers, and broken files. Audio
position will not match to the video (see A-V status field).

AV: 00:00:36 / 00:01:57 (31%) A-V:  0.000 Dropped: 422

vlc (after a while):
[h264 @ 0x7fc024cd9f40] co located POCs unavailable

Am 23.06.21 um 04:01 schrieb Daniel van Vugt:
> Thanks for the detailed document but concise means short. Please
> describe the problem in one or two sentences.
>
> As I understand it you are talking about intel_gpu_top reporting numbers
> you don't expect, but that in itself is not a bug.
>