[Bug 775176] opusenc: combines stereo channels into mono

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=775176

--- Comment #4 from Bob Squirrell <bobsquirrell at uk2.net> ---
I have a sound mixer connected to my PC so I can control the sound input.  If I
use this pipeline then what I put in matches what comes out.

gst-launch-1.0 autoaudiosrc ! queue ! autoaudiosink

I then add in the opus encoder and decoder.

gst-launch-1.0 autoaudiosrc ! opusenc ! queue ! opusdec ! autoaudiosink

Now if I feed in stereo I get mono out.  If I only supply the left channel it
comes out of both channels, likewise if I only supply the right hand channel.

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