[gstreamer-bugs] [Bug 311423] [playbin] doesn't handle ac3 output to alsaspdifsink

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-base | Ver: HEAD CVS




------- Comment #12 from Josselin Mouette  2008-11-09 16:01 UTC -------
(In reply to comment #10)
> I think alsasink also handles SPDIF now, rendering alsaspdifsink obsolete (not
> that it matters much in terms of implementation).

Actually it doesn’t seem to work. The following does not work:
 gst-launch-0.10 -v filesrc location=/tmp/toto.ac3 ! ac3iec958  ! alsasink
while the following does:
 gst-launch-0.10 -v filesrc location=/tmp/toto.ac3 ! ac3iec958  ! alsaspdifsink

but actually playbin does not use it.

AIUI, we need to extend playbin with a new property so that it actually
understands that we want IEC958 output. Otherwise you may end up with no sound
on other systems.

If this parameter is set and if the audio stream type is audio/ac3, we should
replace the audio decoder by ac3iec958 and the output sink by alsaspdif sink.
Does it feel like a correct approach?

I’m ready to code it, however I’m relatively new to GStreamer and don’t
know where these are set in playbin, so if someone could point me to where to
start, it would be very nice.


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