Problem with Transmitting media using JMF

Question

Hello Everyone !!
I am working on an application called SIPSpeaker which listens for incoming calls, answer the call and plays a message. I am done with the first two parts of the application, i.e. it can successfully answers the call. I am now facing problem with transmitting audio to the SIP Phone (the caller). I am using JMF and I am trying to send the audio over RTP.
My code looks something like this....
locator = new MediaLocator("rtp://130.237.214.124:" + port + "/audio");
        f = new File("C:/1.wav");
        try {
            ds = Manager.createDataSource(f.toURL());         
        } catch (NoDataSourceException ex) {
            ex.printStackTrace();
        } catch (MalformedURLException ex) {
            ex.printStackTrace();
        } catch (IOException ex) {
            ex.printStackTrace();
        format = new Format[]{new AudioFormat(AudioFormat.GSM_RTP,8000,8,1)};
        contentDesc = new ContentDescriptor(ContentDescriptor.RAW_RTP);
                processor = Manager.createProcessor(ds);
                waitForState(processor,Processor.Configured);
                processor.setContentDescriptor(contentDesc);
                processor.getTrackControls()[0].setFormat(format[0]);
                waitForState(processor,Processor.Realized);
try {
            sink = Manager.createDataSink(processor.getDataOutput(),locator);
            System.out.println("6");
        } catch (NotRealizedError ex) {
            ex.printStackTrace();
        } catch (NoDataSinkException ex) {
            ex.printStackTrace();
processor.start();
        try {
            sink.open();
            sink.start();
        } catch (SecurityException ex) {
            ex.printStackTrace();
        } catch (IOException ex) {
            ex.printStackTrace();
           we are required to work with a .wav file as input ....
i am new to java and to JMF and i have absolutely no idea whats going wrong...
please help me
Regards,
Sanjay !!

Answer 1

Hello
following is the error i get
Failed to realize: com.sun.media.ProcessEngine@618d26
Cannot build a flow graph with the customized options:
Unable to transcode format: mpeglayer3, 44100.0 Hz, 16-bit, Stereo, LittleEndian, Signed, 16000.0 frame rate, FrameSize=32768 bits
to: mpegaudio/rtp, 8000.0 Hz, 8-bit, Mono
outputting to: RAW/RTP
Error: Unable to realize com.sun.media.ProcessEngine@618d26
what could be the problem ???