Receiving speex via RTP stream

[rjscheif]

Hi -

I am currently developing an application that streams speex audio from a microphone and I want to playback that audio in VLC media player. I have successfully streamed other formats (such as PCM and u-law) but I wanted to use speex because of it's compression. I can set up the stream just fine but when I start to send the RTP packets to VLC I receive a message in the message window:

main decoder error: no suitable decoder module for fourcc 'undf'.
VLC probably does not support this sound or video format.

I know that VLC does support speex, but I don't know if it supports speex playback via RTP. If it does, I must be doing something wrong.

A few questions:
How does VLC determine which codec to load on an RTSP stream?
When streaming speex audio, am I supposed to send just the speex data I get from the encoder or am I supposed to put that data in the Ogg container?

Thank you so much!

rjscheif