[Webkit-unassigned] [Bug 260491] REGRESSION (Safari 17 beta): [MSE] Can no longer play .FLAC inside MP4

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Tue Aug 22 14:55:45 PDT 2023


--- Comment #3 from Jer Noble <jer.noble at apple.com> ---
It looks like the iOS media subsystem has gotten much more strict about extended MIME type validation. Specifically for `codecs=flac` they will only report support for the RFC4281 registered string 'fLaC'. However, WebKit has a case-insensitive cache of previous codec checks, so if anyone checks for 'flac' before checking for 'fLaC', those checks will always fail (and always succeed vice-versa if they were checked in a different order). So there's at least one intentional change and one underlying WebKit bug that is causing this behavior.

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