[pulseaudio-discuss] bug in gstreamer or pulseaudio?

[Achim Frase]

Am Dienstag, den 12.08.2008, 15:50 +0200 schrieb Achim Frase:
> Am Dienstag, den 12.08.2008, 14:25 +0100 schrieb Colin Guthrie:
> > 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!).
> 
> okay, interesting.
> 
> > 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 
> > properly.
> 
> Yes, my channel mapping seems to work quite good for playback
> (out-of-the-box). But it is a bit tricky to record 5.1 Sound.
> I was not able to record the sound properly with pacat. I have tried
> some options but without much success.

Sorry for the noise, I thought I give pacat a second try and now it
works. I needed to set the channel mapping as options for pacat.

What I don't understand is why the normal playback works without any
extra options. I only set the default-sample-channels = 6 in
the /etc/pulse/daemon.conf

> > That said, I've had issues with oggs before where they get the mapping 
> > wrong :s
> 
> Thanks for your help so far.