Bug 275908

Summary:	VP9 with transparency plays back incorrectly
Product:	WebKit	Reporter:	Jake Archibald <jaffathecake>
Component:	Media	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	jean-yves.avenard, jer.noble, jmuizelaar, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	Safari Technology Preview
Hardware:	Unspecified
OS:	Unspecified

Description Jake Archibald 2024-06-26 10:30:54 PDT

https://static-misc-3.glitch.me/alpha-video-test/vp9-video.html

Plays back slowly, and with a grey background rather than transparent.

Compare to Chrome/Firefox for the correct output.

Comment 1 Radar WebKit Bug Importer 2024-07-03 10:31:21 PDT

<rdar://problem/131062589>