[Bug 723646] mpeg4videoparse: push caps before segment when first data is a GAP

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=723646
  GStreamer | gst-plugins-bad | unspecified

--- Comment #3 from Thiago Sousa Santos <thiago.sousa.santos at collabora.co.uk> 2014-02-08 12:07:21 UTC ---
(In reply to comment #2)
> Review of attachment 268117 [details]:
> 
> I'm not sure if this is a good idea... we might only know the real caps after
> parsing the first buffer and if the first thing is a GAP event we might have
> different caps first. And that can easily confuse decoders unfortunately :(

Do we have any other option? We need caps before segment and before data, and a
GAP is data (of some sort).

Elements could accept a 'partial' caps and only error out if they actually
receive a buffer before a 'complete' caps is received, but then this makes
everything even more complex.

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