RESOLVED FIXED314077
[MSE][Cocoa] spurious UpcomingPTSExpectation warnings from AVSampleBufferVideoRenderer on B-frame content 
https://bugs.webkit.org/show_bug.cgi?id=314077
Summary [MSE][Cocoa] spurious UpcomingPTSExpectation warnings from AVSampleBufferVide...
Jean-Yves Avenard [:jya]
Reported 2026-05-05 06:03:55 PDT
Seen when streaming twitch. Twitch appends media segments with a single video frame at a time, and plays with very short buffered ahead content. This causes the calculation of the expectMinimumUpcomingSampleBufferPresentationTime calculation to be incorrect and we see thousands of errors in the logs "UpcomingPTSExpectation is enabled, but enqueuePTS:X is smaller than expectedMinimumUpcomingPTS:Y"
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Radar WebKit Bug Importer
Comment 1 2026-05-05 06:04:01 PDT
<rdar://problem/176260662>
Jean-Yves Avenard [:jya]
Comment 2 2026-05-05 07:14:58 PDT
Pull request: https://github.com/WebKit/WebKit/pull/64270
EWS
Comment 3 2026-05-06 20:56:36 PDT
Committed 312763@main (62987e20ab97): <https://commits.webkit.org/312763@main> Reviewed commits have been landed. Closing PR #64270 and removing active labels.
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