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Hi Tristan,<br>
<blockquote cite="mid:4AB3A78B.5000104@sat.qc.ca" type="cite">
<pre wrap="">You probably have to set the "channel-positions" property on the
interleave element, which you can't do with gst-launch as I recall (i.e.
you need to write c or python app for it) as it is an array. However for
more than 8 channels the positions might have to all be set to
GST_AUDIO_CHANNEL_POSITION_NONE
</pre>
</blockquote>
Yes I read about that
(<a class="moz-txt-link-freetext" href="http://tristanswork.blogspot.com/2008/08/multichannel-audio-with-gstreamer.html">http://tristanswork.blogspot.com/2008/08/multichannel-audio-with-gstreamer.html</a>),
and can I do this in python as well? (I dont mind C, but python will be
quicker).<br>
<br>
<blockquote cite="mid:4AB3A78B.5000104@sat.qc.ca" type="cite">
<pre wrap="">Are you just trying to do something like this?
gst-launch -v jackaudiosrc connect=none ! audio/x-raw-float, channels=24
! vorbisenc ! vorbisdec ! jackaudiosink connect=none
</pre>
</blockquote>
Well, almost :)<br>
<br>
I am trying to put rtp in between the vorbisencoder and decoder so I
can stream n channels from A to B over a single rtp session<br>
<br>
I get the following on the receiving end (after copying the new config
string from A to B):<br>
<br>
<tt>GstPipeline:pipeline0/GstVorbisDec:vorbisdec0.GstPad:sink: caps =
audio/x-vorbis<br>
WARNING: from element /GstPipeline:pipeline0/GstVorbisDec:vorbisdec0:
Could not decode stream.<br>
Additional debug info:<br>
vorbisdec.c(670): vorbis_handle_identification_packet ():
/GstPipeline:pipeline0/GstVorbisDec:vorbisdec0:<br>
Using NONE channel layout for more than 8 channels<br>
</tt><br>
Which is weird because it knows this:<br>
<br>
<tt>/GstPipeline:pipeline0/GstVorbisDec:vorbisdec0.GstPad:src: caps =
audio/x-raw-float, rate=(int)48000, channels=(int)24,
endianness=(int)1234, width=(int)32,
channel-positions=(GstAudioChannelPosition)<
GST_AUDIO_CHANNEL_POSITION_NONE, GST_AUDIO_CHANNEL_POSITION_NONE,
GST_AUDIO_CHANNEL_POSITION_NONE, GST_AUDIO_CHANNEL_POSITION_NONE,
GST_AUDIO_CHANNEL_POSITION_NONE, GST_AUDIO_CHANNEL_POSITION_NONE,
GST_AUDIO_CHANNEL_POSITION_NONE, GST_AUDIO_CHANNEL_POSITION_NONE,
GST_AUDIO_CHANNEL_POSITION_NONE, GST_AUDIO_CHANNEL_POSITION_NONE,
GST_AUDIO_CHANNEL_POSITION_NONE, GST_AUDIO_CHANNEL_POSITION_NONE,
GST_AUDIO_CHANNEL_POSITION_NONE, GST_AUDIO_CHANNEL_POSITION_NONE,
GST_AUDIO_CHANNEL_POSITION_NONE, GST_AUDIO_CHANNEL_POSITION_NONE,
GST_AUDIO_CHANNEL_POSITION_NONE, GST_AUDIO_CHANNEL_POSITION_NONE,
GST_AUDIO_CHANNEL_POSITION_NONE, GST_AUDIO_CHANNEL_POSITION_NONE,
GST_AUDIO_CHANNEL_POSITION_NONE, GST_AUDIO_CHANNEL_POSITION_NONE,
GST_AUDIO_CHANNEL_POSITION_NONE, GST_AUDIO_CHANNEL_POSITION_NONE ></tt><br>
<br>
Do you have any tips? (Maybe the NONE layout is not in the vorbis
config string ...)<br>
<br>
Regards, Dirk<br>
<br>
PS - how do you call the 'audio/x-raw-float, channels=24' element?<br>
<br>
<blockquote cite="mid:4AB3A78B.5000104@sat.qc.ca" type="cite">
<pre wrap="">(note that the bottleneck here will probably be your soundcard).
-Tristan
Dirk Griffioen wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Thanks for the answer!
</pre>
<blockquote type="cite">
<pre wrap="">I think you need to interleave several mono channels from audiotestsrc
into a stereo stream and then shove them into the vorbis encoder. You
need an audio mixer, or something like that.
</pre>
</blockquote>
<pre wrap="">I would like to encode separate channels.
For example, this runs
gst-launch-0.10 -v interleave name=i ! queue ! \
vorbisenc ! vorbisdec ! \
jackaudiosink connect=none \
jackaudiosrc ! audioconvert ! queue ! i. \
jackaudiosrc ! audioconvert ! queue ! i.
but this does not:
gst-launch-0.10 -v interleave name=i ! queue ! \
vorbisenc ! vorbisdec ! \
jackaudiosink connect=none \
jackaudiosrc ! audioconvert ! queue ! i. \
jackaudiosrc ! audioconvert ! queue ! i. \
jackaudiosrc ! audioconvert ! queue ! i. \
jackaudiosrc ! audioconvert ! queue ! i.
Do you know why? The vorbis spec allows for 255 channels and I simply
would like to run n channels through the vorbis encoder ...
I really could use some help.
Thanks in advance, Dirk
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</pre>
</blockquote>
<pre wrap=""><!---->
</pre>
</blockquote>
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