[Webkit-unassigned] [Bug 256428] New: [GStreamer][MSE] Decoder sometimes receives caps event before stream-start

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=256428

            Bug ID: 256428
           Summary: [GStreamer][MSE] Decoder sometimes receives caps event
                    before stream-start
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Platform
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: philn at igalia.com
                CC: bugs-noreply at webkitgtk.org

And that triggers a crash in the recently added player codecProbe. 

operator():<MSE-media-player-5> Setting codec for stream (null) to avc1.64002A

Reproduces flakily on release builds (wasn't able to reproduce this on debug) when loading  https://interbrand.com/

For now I'll add a workaround/warning. This codec probe is not critically important, but there's a bug to dive in here, caps events should not reach a pad before stream-start.

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