[Webkit-unassigned] [Bug 214100] New: fMP4 + AES-128 broken

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=214100

            Bug ID: 214100
           Summary: fMP4 + AES-128 broken
           Product: WebKit
           Version: Safari 13
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: chris at hiszpanski.name

Fragmented MP4 (fMP4) media segments encrypted with whole-file AES-128 encryption do not play on Safari 13.1 (and iOS 13.5.1). Appears to be a regression as this worked as of June 3rd.

Issue was first raised here: https://developer.apple.com/forums/thread/131625
The referenced forum thread contains an example playlist demonstrating the issue.

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