[Bug 787061] qtdemux: segmentation fauit with protected DASH streams

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=787061

--- Comment #1 from Juergen Sachs <juergen.sachs at metz-ce.de> ---
Created attachment 358830
  --> https://bugzilla.gnome.org/attachment.cgi?id=358830&action=edit
propsed workaround to avoid the crash

Obviously the crash is caused by use of unintialized variables. In the testcase
there is only audio in the MP4 multiplex and at line 11140 the unitialized mp4v
is evaluated. 
Please review lines 11140ff generally, 
- is it really necessary to evaluate video components in audio case?
- the protection handling for audio at this line is different from video at
line 10023ff. Is this really the intention? Shouldn't this be "symmetrically"?

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