[pulseaudio-discuss] bug in gstreamer or pulseaudio?

Colin Guthrie gmane at colin.guthr.ie
Tue Aug 12 06:25:09 PDT 2008

Achim Frase wrote:
> If I try to record 5.1 sound with this command line the channels get
> mixed up.
> gst-launch pulsesrc
> device=alsa_output.pci_8086_284b_sound_card_0_alsa_playback_0.monitor !
> queue ! audio/x-raw-float,rate=44100,channels=6 ! audioconvert !
> vorbisenc quality=.8 ! oggmux ! filesink location=outtest.ogg
> If someone finds the time to look at it, that would be nice.
> http://bugzilla.gnome.org/show_bug.cgi?id=547258

I think channel mapping is a bit of a black art. You may need to specify 
your own channel map when loading the alsa source.... although as you 
are using a monitor, you perhaps need a "remap source" module loaded 
(which is a shame as AFAIK, there is only a remap-sink module right now!).

All that said, as it presumably works fine for output, you'd expect that 
recording from the monitor, you'd get a file that you could then output 

That said, I've had issues with oggs before where they get the mapping 
wrong :s


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