Bug 302714 – VideoDecoder sometimes spits out frames in decode order, not in presentation order

• Status: RESOLVED
• Resolution: DUPLICATE
• Component: Media

[David]

Created attachment 477421 [details]
Source file for the video packets in the reproduction

Here's a reproduction: https://kaleidoscopic-babka-de57cf.netlify.app/

I noticed that for some files, VideoDecoder incorretly emits decoded frames in decode order instead of properly reordering them in presentation order like is required per spec. This is basically the bug reported here (https://bugs.webkit.org/show_bug.cgi?id=287516) but I decided to provide a simple reproduction.

I have been employing custom user-side logic to work around this issue on Safari, but I have also stumbled upon WebKit's VideoDecoder ordering frames differently when ran in a Web Worker, see this here: https://github.com/Vanilagy/mediabunny/issues/223

I thought it's better to first address the incorrect ordering in the normal case, and then when we have clarity on that, investigate the Web Worker issue.

[David]

Created attachment 477422 [details]
Other file (big buck bunny section) that also exhibits this behavior

[Radar WebKit Bug Importer]

<rdar://problem/165402113>

[youenn fablet]

Thanks for the repro case, let's do the work in bug 287516.

*** This bug has been marked as a duplicate of bug 287516 ***