[Webkit-unassigned] [Bug 251868] New: [MSE][GStreamer] Don't extend PTS of non-key frame

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=251868

            Bug ID: 251868
           Summary: [MSE][GStreamer] Don't extend PTS of non-key frame
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: eocanha at igalia.com

The edit list support patch from https://bugs.webkit.org/show_bug.cgi?id=231019 was reverted in https://bugs.webkit.org/show_bug.cgi?id=244428. While that patch isn't landed again, we're growing the first buffer of an append near the begining of the stream to make it start from 0. This workaround uses a tolerance of 0.1s, and can cause problems on frames short enough to fit more than one time in the tolerance margin (eg: 3 frames at 30fps would fit, as well as 6 frames at 60fps). 

The process of growing the seconde frame that still fit in the tolerance is triggering the deletion of the first frame, which is usually a sync one. This sweeps other frames into the deletion and causes problems.

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