sorry alex,
this is not the answer for u r question. i am also trying to develop similar application. right now i am able to capture video and audio from my webcam and microphone respectively. i am going through the jmf api for broadcasting classes. i find only sendstream and receive stream interface for sending and receiving the streams respectively. but i dunno how to implement these to interfaces.
if you get any sample solution pls mail me to : amarendarn@yahoo.co.in
thx.