[Bug 665078] opusdec: default to stereo 48000 Hz if possible when no headers seen

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=665078
  GStreamer | gst-plugins-bad | unspecified

Vincent Penquerc'h <vincent.penquerch> changed:

           What    |Removed                     |Added
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                 CC|                            |vincent.penquerch at collabora
                   |                            |.co.uk

--- Comment #5 from Vincent Penquerc'h <vincent.penquerch at collabora.co.uk> 2011-11-29 10:32:30 UTC ---
A single Opus stream can decode to 1 or 2 channels, the encoder is free to
encode mono or stereo information based on the input, and the decoder can
decode this to 1 or 2 channels, regardless of the input.
Caps are only set from headers, so if there's no header, there won't be caps,
or those will be as good as the default since you can't look inside an Opus
data packet and get more info than that (unless multistream, but these are only
valid in Ogg and with headers).

I'm going to use that bug to keep track of shared patches with danilocesar, so
will only commit this when we've made sure his RTP test case works, then I'll
push.

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