RESOLVED INVALID305858
[GST][MSE] Make sure to extend only the very first sample when DTS = 0 and PTS > 0 
https://bugs.webkit.org/show_bug.cgi?id=305858
Summary [GST][MSE] Make sure to extend only the very first sample when DTS = 0 and PT...
Enrique Ocaña
Reported 2026-01-20 10:57:08 PST
In the absence of an edit list, ensure that WebKit’s AppendPipeline extends only a single sample. This fixes the handling of invalid streams with multiple DTS = 0 samples. Modifying PTS values for all of them results in unexpected behavior, playback issues, PTS reordering, etc. The problem was spotted in a video web application that uses TS -> MSE transmuxing. See: https://github.com/WebPlatformForEmbedded/WPEWebKit/pull/1601
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Enrique Ocaña
Comment 1 2026-01-20 11:12:23 PST
Pull request: https://github.com/WebKit/WebKit/pull/56917
Enrique Ocaña
Comment 2 2026-01-22 06:46:01 PST
Withdrawing this PR/bug, since in the end we found a better solution to the problem by just applying a condition that was already present upstream. See: https://github.com/WebPlatformForEmbedded/WPEWebKit/pull/1601
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