[Bug 735070] ASF file not playing back properly

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=735070
  GStreamer | gst-plugins-ugly | 1.4.0

--- Comment #7 from Tim-Philipp Müller <t.i.m at zen.co.uk> 2014-08-21 14:04:04 UTC ---
codec_data is used for out-of-band codec data. For h264 it is pretty much
defined to be in avcc format, and it is also only defined for
stream-format=avc. I'm sure there's code out there that will decode whether
something is avc based on the presence of the codec_data field too (for
historical reasons mostly).

I think making codec_data for byte-stream a thing would be confusing and
probably break stuff. I also think making codec_data with a different
representation of the content a thing is bad.

The difference between streamheader and codec_data fields is that codec_data is
out-of-band and streamheader can be prepended to the actual stream data (when
written to file or sent across the network, for example), so I think in this
case streamheader is the best fit, and the correct thing to do.

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