[Webkit-unassigned] [Bug 198053] [GStreamer][MSE] Desync between audio/video

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu Jan 5 09:48:34 PST 2023


Philippe Normand <philn at igalia.com> changed:

           What    |Removed                     |Added
                 CC|                            |philn at igalia.com

--- Comment #9 from Philippe Normand <philn at igalia.com> ---
(In reply to Michael Catanzaro from comment #0)
> Visit any YouTube video featuring a talking head (to make the problem more
> obvious), e.g. https://www.youtube.com/watch?v=jTBNHkCjgnc
> Click to either fullscreen the video, or enlarge into theater mode. Video
> playback will hang for a second or two while audio continues (unlike in
> other browsers, where playback is smooth).
> Then when playback resumes, notice that the audio and video are slightly
> desynced. The audio is playing properly (it was never stalled). The video is
> noticeably a quarter of a second or so behind the audio. This is our fault;
> they should be perfectly synced.

I can't reproduce this with Ephy TP. The openh264 decoder was choking a bit at the beginning and introducing stuttering but then it settled... Attaching a screencast (without audio though).

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