$ gst-launch udpsrc port=2002 ! rtpgsmparse ! gsmdec ! osssink
RUNNING pipeline
Entity: line 1: error: Start tag expected, '<' not found
??
^
Caught SIGSEGV accessing address 0xc

+ Trace 39538

Java code used:
import java.io.*;
import java.util.Vector;
                                                                          
     
import javax.media.*;
import javax.media.format.*;
import javax.media.protocol.*;
import javax.media.control.*;
                                                                          
     
public class RTPServer implements ControllerListener {
    private boolean realized = false;
    private boolean configured = false;
                                                                          
     
    public static void main(String [] args) {
        new RTPServer();
    }
                                                                          
     
                                                                          
         public RTPServer() {
        Processor p;
                                                                          
     
        String srcFile = "/home/ahacop/junk.wav";
        // String destUrl = "rtp://224.144.251.104:49150/audio/1";
        String destUrl = "rtp://192.168.0.9:2002/audio/1";
        DataSink rtpSink;
        MediaLocator src = new MediaLocator("file:" + srcFile);
        MediaLocator dest = new MediaLocator(destUrl);
        // MediaLocator dest = new MediaLocator("rtpraw://");
                                                                          
     
        try {
            p = Manager.createProcessor(src);
            p.addControllerListener(this);
                                                                          
     
            p.configure();
            while (! configured) {
                try {
                    Thread.currentThread().sleep(100L);;
                } catch (InterruptedException e) {
                    // ignore
                }
            }
                                                                          
     
        TrackControl track[] = p.getTrackControls();
                                                                          
     
        boolean encodingOk = false;
            p.setContentDescriptor(new
ContentDescriptor(FileTypeDescriptor.RAW_RTP));
for (int i = 0; i < track.length; i++) {
             if (!encodingOk && track[i] instanceof FormatControl) {
                                                                          
     
                 if (((FormatControl)track[i]).
                     setFormat( new AudioFormat(AudioFormat.GSM_RTP,
                                                8000,
                                                8,
                                              1)) == null) {
                                                                          
     
                    track[i].setEnabled(false);
                 }
                 else {
                     encodingOk = true;
                 }
             } else {
                 // we could not set this track to gsm, so disable it
                 track[i].setEnabled(false);
             }
         }
                                                                          
     
                                                                          
     
            p.realize();
            while (! realized) {
                try {
                    Thread.currentThread().sleep(100L);;
                } catch (InterruptedException e) {
                    // ignore
                }
            }
                                                                          
     
            DataSource output = p.getDataOutput();
            rtpSink = Manager.createDataSink(output, dest);
            System.out.println("Sink content type: " +
rtpSink.getContentType());
            System.out.println("Sink media type: " +
rtpSink.getOutputLocator().toString());
            rtpSink.open();
            rtpSink.start();
            p.start();
                                                                          
     
        } catch(Exception e) {
            e.printStackTrace();
            System.exit(1);
        }
    }
                                                                          
     
    public synchronized void controllerUpdate(ControllerEvent evt) {
        if (evt instanceof RealizeCompleteEvent) {
            realized = true;
        } else  if (evt instanceof ConfigureCompleteEvent) {
            configured = true;
        } else if (evt instanceof EndOfMediaEvent) {
            System.exit(0);
        } else {
            // System.out.println(evt.toString());
        }
    }
}