live video streaming

Hello, i use Lenny amd64

Does somebody could please tell me how, or give me a link to a tutorial
or how to, to do live video streaming? I have tried icecast2 and vlc;
vlc shows the error "Unable to open 'v4l://'", but the webcam works well
with Ekiga. Icecast2 can not start when i do /etc/init.d/icecast2 start.

Any help is appreciated.

PD:
ls /dev/video* shows /dev/video0


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