[Webkit-unassigned] [Bug 198053] New: [GStreamer] Delay when changing video size causes desync between audio/video

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Mon May 20 15:11:56 PDT 2019


            Bug ID: 198053
           Summary: [GStreamer] Delay when changing video size causes
                    desync between audio/video
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mcatanzaro at igalia.com

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.

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