[vlc] audio codec problems

[madmax]

My system : Linux RedHat 9 (2.4.20-8)
VLC : 0.7.2

I want to stream my webcam on Linux to Linux in RTP on multicast. The only video codec that is working for streaming with a webcam is the "mpg2v".
I had problems when I wanted to stream because none of the audio codecs were working.
So I've compiled ffmpeg with --enable-a52 --enable-vorbis (--enable-mp3lame does not compile), and then only the MPGA and A52 codecs were working for streaming.

But now the problem is that if I want to listen to this stream, vlc give me :

For MPGA :
[00000182] main input: playlist item `udp://@230.0.0.21'
[00000184] mpeg_audio decoder: MPGA channels:2 samplerate:44100 bitrate:192
[00000186] main audio output error: couldn't find a filter for the conversion

For A52 :
[00000185] a52 decoder: A/52 channels:2 samplerate:44100 bitrate:192000
[00000186] main audio output error: couldn't find a filter for the conversion
[00000186] main audio output error: couldn't set an input pipeline

Of course it's working well on Windows, I can listen to the sound in the stream.

Any idea ?? Thanks !

Maxime
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