Transmitting audio stream by RTP

Question

Hello:
I am trying to transmit audio stream with this code, but i dont get it work well.
The output is:
C:\RUN\EX14>java AVTransmit2 file:/c:/run/format/au/drip.au 1.1.9.147 45200
Track 0 is set to transmit as:
ULAW/rtp, 8000.0 Hz, 8-bit, Mono, FrameSize=8 bits
Created RTP session: 1.1.9.147 45200
Start transmission for 60 seconds...
Code to AVTransmit2.java:
* Use the RTPManager API to create sessions for each media track of the processor.
private String createTransmitter() {
     // Cheated. Should have checked the type.
     PushBufferDataSource pbds = (PushBufferDataSource)dataOutput;
     PushBufferStream pbss[] = pbds.getStreams();
     rtpMgrs = new RTPManager[pbss.length];
     SessionAddress localAddr, destAddr;
     InetAddress ipAddr;
     SendStream sendStream;
     int port;
     SourceDescription srcDesList[];
     for (int i = 0; i < pbss.length; i++) {
     try {
          rtpMgrs[i] = RTPManager.newInstance();     
// The local session address will be created on the
// same port as the the target port. This is necessary
// if you use AVTransmit2 in conjunction with JMStudio.
// JMStudio assumes - in a unicast session - that the
// transmitter transmits from the same port it is receiving
// on and sends RTCP Receiver Reports back to this port of
// the transmitting host.
          port = portBase + 2*i;
          ipAddr = InetAddress.getByName(ipAddress);
          localAddr = new SessionAddress();
//*          InetAddress.getLocalHost(),
//*                                   port);
          destAddr = new SessionAddress( ipAddr,
                              port);
          rtpMgrs.initialize( localAddr);
          rtpMgrs[i].addTarget( destAddr);
          System.err.println( "Created RTP session: " + ipAddress + " " + port);
          sendStream = rtpMgrs[i].createSendStream(dataOutput, i);          
          sendStream.start();
     } catch (Exception e) {
          return e.getMessage();
     return null;
The code receptor is working well, because I tried it with JMStudio.
Why it doesnt transmit ?
I need your greatly help.
Thanks.

Answer 1

What is different from your previous question ?