[Webkit-unassigned] [Bug 216088] REGRESSION <img src=mp4> with hvc1 and (some) avc1 do not load

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=216088

--- Comment #8 from Jer Noble <jer.noble at apple.com> ---
This has nothing to do with `hvc1` Or `avc1` codecs _per se_. Rather, the bug is about discrepancies between “presentation time stamps” and “output presentation timestamps”. I had a hard time creating a synthetic test case, but the main culprit in this kind of discrepancy is an `edts` atom shifting the PTS of the first sample to align it with PTS=0.

So one possible workaround is to remove `edts` boxes in those files, and see if that fixes the playback issue. Another is to re-author them to use negative CTS, so that the first sample will naturally land at PTS=0 even without an `edts` box.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.webkit.org/pipermail/webkit-unassigned/attachments/20200916/2fb6e9b2/attachment.htm>