[gst-devel] LADSPA stereo plugins

[Remi+]

Hi,

I'm a beginer in Gstreamer, so perhaps my question is stupid.

I'd like to record sound on ALSA (or Pulse) input and modify this sound
with LADSPA plugins.
It's Ok for me for LADSPA Mono plugins not for Stereo ones.
(examples with swh-plugins)

Using Mono sc4 LADSPA plugin OK :
---------------------------------
gst-launch-0.10 --gst-debug-level=1 \
autoaudiosrc ! progressreport name=Source update-freq=1 ! \
audioconvert ! \
audio/x-raw-float,channels=1,width=32,rate=44100,endianness=1234 ! \
ladspa-sc4m ! audioconvert ! flacenc ! filesink location=f.flac

Using Stereo sc4 LADSPA plugin KO.
----------------------------------
gst-launch-0.10 --gst-debug-level=1 \
autoaudiosrc !
audio/x-raw-int,channels=2,width=16,depth=16,signed=true,rate=44100,endianness=1234
! \
progressreport name=Source update-freq=1 ! \
audioconvert ! \
audio/x-raw-float,channels=2,width=32,rate=44100,endianness=1234 ! \
deinterleave name=di \
di.src0 ! queue ! audioconvert ! \
audio/x-raw-float,channels=1,width=32,rate=44100,endianness=1234 !
limit.Left_input \
di.src1 ! queue ! audioconvert ! \
audio/x-raw-float,channels=1,width=32,rate=44100,endianness=1234 !
limit.Right_input \
ladspa-sc4 name=limit \
limit.Left_output ! audioconvert ! il.sink0 \
limit.Right_output ! audioconvert ! il.sink1 \
interleave name=il ! audioconvert ! flacenc ! filesink location=f.flac

In gst-inspect, I can see that Stéréo plugins have 2 sound sink input
and two src output. So I thinbk I should deinterleave left and right
channel. My problem is gtreamer start but don't process signal input.
Output file is empty and progress is stuck at 0 seconds.

I really don't konw how to do...

So my main question is :
How to use LADSPA stereo plugin in Gstreamer ?

Best regards,
Rémi+