[gst-devel] Separate audio feeds to front/side/rear channels

[Wim Taymans]

On Wed, 2010-08-25 at 03:07 -0700, drunkahol wrote:


> # gst-launch filesrc location=test.ogg ! decodebin ! audioconvert ! alsasink
> device=front & 
> 
> gives me: 
> Setting pipeline to PAUSED ... 
> Pipeline is PREROLLING ... 
> ERROR: from element
> /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstOggDemux:oggdemux0:
> Internal data stream error. 
> Additional debug info: 
> gstoggdemux.c(3450): gst_ogg_demux_loop ():
> /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstOggDemux:oggdemux0: 
> stream stopped, reason not-negotiated 
> ERROR: pipeline doesn't want to preroll. 
> Setting pipeline to NULL ... 
> Freeing pipeline ... 
> 
> Leaving the "device=front" part off allows the audio to play. 

You need to add audioresample before alsasink, this is likely a case
where the samplerate of the ogg file is not supported natively by the
front device, which by default doesn't do automatic resampling.

> 
> Is there something I need to do to get the Ogg stream in the right format to
> play back on front/side/rear? Also, is there any way of listing which
> devices are available for alsasink?  I've poked around endlessly with alsa
> configs etc and there doesn't seem to be anything.

aplay -L is probably what you are looking for.

Wim



> 
> Thanks 
> 
> Duncan 
>