Java media framework et rtp

code fragment:

/*beginning*/

else if (evt instanceof NewReceiveStreamEvent) {
try {
stream = ((NewReceiveStreamEvent)evt).getReceiveStream();
DataSource ds = stream.getDataSource();
// Find out the formats.
RTPControl ctl = (RTPControl)ds.getControl("javax.media.rtp.RTPControl");
if (ctl != null){
System.err.println(" - Received new RTP stream: " + ctl.getFormat());

} else{
System.err.println(" - Recevied new RTP stream");
}

if (participant == null){
System.err.println(" The sender of this stream had yet to be identified.");
}
else {
System.err.println(" The stream comes from: " + participant.getCNAME());

}
// create a player by passing datasource to the Media Manager

try{
MediaPlayer p = new MediaPlayer();

System.out.println("player created");
p.setDataSource(ds);//generates an IncompatibleSourceException
System.out.println("...ds set!!");
p.addControllerListener(this);
p.realize();
System.out.println("player state : "+p.getState());
System.out.println("Realized= "+Controller.Realized);

synchronized(dataSync){

p.waitForState(Controller.Realized);//never get past this point

}
System.out.println("Player realized!");
...

}catch(Exception ex){
System.out.println(ex.getClass().getName());
}



/*end of code fragment*/

output:
------

Fobs4JMF -Native shared library found
javx.media.InompatibleSourceExcpetion : Invalid Datasource
at com.omnividea.media.parser.video.Parser.setSource(Parser.java:142)
at com.omniidea.media.content.unknown.Handler.setSource(Handler.java:94)
...
at AVReceive2.update(AVReceive2.java: 292)
at com.sun.media.rtp.RTPEventHandler.processEvent(...)
at com.sun.media.rtp.RTPEventHandler.dispatchEvents(...)
at com.sun.media.rtp.RTPEventHandler.run(...)


Merci d'avance de votre support!!