[Webkit-unassigned] [Bug 138505] New: Crash playing DASH video

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=138505

            Bug ID: 138505
           Summary: Crash playing DASH video
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media Elements
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: xclaesse at gmail.com

Created attachment 241180
  --> https://bugs.webkit.org/attachment.cgi?id=241180&action=review
Relevant valgrind trace

Webkit2 sometimes crash when playing that video: http://demo.unified-streaming.com/video/smurfs/smurfs.ism/smurfs.mpd?format=mp4

The crash happens when DASH decides to change the video's resolution (it's adaptative). When gstreamer sends caps it means that the NEXT buffer will have that new resolution, but a race can occure and webkit will use that new caps for the PREVIOUS buffer. That lead to a crash because the resolution (thus buffer size) mismatch.

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