Error : Can't open local data port

Question

Hello:
I�d like present this problem to yours:
I am executing two files Client/Server into my own PC, using two DOS console different, this one to Client an another to Server.
I got this error:
Output of the CLient (DOS Console of the client)
C:\RUN\EX14>java AVReceive2 1.1.9.147/45300
- Open RTP session for: addr: 1.1.9.147 port: 45300 ttl: 1
- Waiting for RTP data to arrive...
- Waiting for RTP data to arrive...
- A new participant had just joined: mpalacios@mpv
- Waiting for RTP data to arrive...
- Waiting for RTP data to arrive...
Output of the Server (DOS Console of the Server)
C:\RUN\EX14>java AVTransmit2 file:/c:/run/format/au/drip.au 1.1.9.147 45300
Track 0 is set to transmit as:
ULAW/rtp, 8000.0 Hz, 8-bit, Mono, FrameSize=8 bits
Error : Can't open local data port: 45300
Well, 1.1.9.147 is the IP address of my PC.
So, What�s the problem?
If you need of the rest of code, please say me.
Thanks.
Angel.

Answer 1

Well, I am agree with you, but I have this code in the Transmit File (Server):
* 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;
When I use this Files (Client/Server), between diffrent PCs into LAN, eg, Client (One PC) and Server (Another PC), but I used:
This One PC: (IP Address PC = 1.1.9.150)
C:\run\ex14\java AVTransmit2 file:/c:/run/format/audrip.au 1.1.9.147 45300
Another PC:(IP Address PC = 1.1.9.147)
C:\run\ex14\java AVReceive2 1.1.9.147/45300
That�s work right!
So, what�s happen?