RTPSocketPlayer run in failure

Question

I downloaded AVTransmit2.java, AVReceive2.java and RTPSocketPlayer.java
I have 2 projects both using j2sdk1.4.2_04.
one project run AVTransmit2 in Computer1 in my Lan,
another project run AVReceive2 and RTPSocketPlayer in Computer2 in the same Lan.
at the line no.50 in RTPSocketPlayer.java,
I modified-->the String address="10.7.123.123";
For traceing the error,I add
two lines before and after "mysock.receive(dp);" at the line no.197 in RTPSocketPlayer.java
as:
long t=System.currentTimeMillis();
mysock.receive(dp);               
System.out.println("mysock.receive(dp) take : "+(System.currentTimeMillis()-t)+" miniSeconds");
In Computer1,I run AVTransmit2 ,got as:
(If the parameters "vfw://0" is replaced by "file:/C:/media/test.mov"
I got same result ! In my case,I have no Mic in my webCam!)
C:\>java AVTransmit2 vfw://0 10.7.123.123 9000
Track 0 is set to transmit as:
H263/RTP, 352x288
Created RTP session: 10.7.123.123 9000
Start transmission for 60 seconds...
...transmission ended.
In Computer2,I run AVReceive2 ,got as:
C:\>java AVReceive2 10.7.123.123/9000
- Open RTP session for: addr: 10.7.123.123 port: 9000 ttl: 1
- Recevied new RTP stream: H263/RTP
The sender of this stream had yet to be identified.
- Waiting for RTP data to arrive...
- A new participant had just joined: Administrator@y64-fly
- A new participant had just joined: Administrator@y640
- The previously unidentified stream
H263/RTP
had now been identified as sent by: Administrator@y640
- Got "bye" from: Administrator@y640
Exiting AVReceive2
This is as I expected,It succeed !
In Computer1,I run AVTransmit2 again as:
C:\>java AVTransmit2 vfw://0 10.7.123.123 9000
Track 0 is set to transmit as:
H263/RTP, 352x288
Created RTP session: 10.7.123.123 9000
Start transmission for 60 seconds...
...transmission ended.
In Computer2,I run RTPSocketPlayer ,I get failure as:
C:\>java RTPSocketPlayer
mysock.receive(dp) take : 16 miniSeconds
mysock.receive(dp) take : 16 miniSeconds
mysock.receive(dp) take : 187 miniSeconds
mysock.receive(dp) take : 0 miniSeconds
mysock.receive(dp) take : 188 miniSeconds
mysock.receive(dp) take : 171 miniSeconds
Cannot create the RTP Session: 1
java.lang.NullPointerException
at com.sun.media.content.rtp.Handler.doClose(Handler.java:294)
at com.sun.media.BasicController.close(BasicController.java:261)
at com.sun.media.BasicPlayer.doFailedRealize(BasicPlayer.java:1331)
at com.sun.media.content.rtp.Handler.doFailedRealize(Handler.java:277)
at com.sun.media.RealizeWorkThread.failed(BasicController.java:1412)
at com.sun.media.StateTransitionWorkThread.run(BasicController.java:1346)
mysock.receive(dp) take : 16 miniSeconds
java.lang.NullPointerException
at com.sun.media.content.rtp.Handler.updateStats(Handler.java:670)
at com.sun.media.StatsThread.process(BasicPlayer.java:1841)
at com.sun.media.util.LoopThread.run(LoopThread.java:135)
mysock.receive(dp) take : 3844 miniSeconds
The main error is "Cannot create the RTP Session: 1"
I really wonder why AVReceive2 can receive AVTransmit2
but RTPSocketPlayer can not receive AVTransmit2 ?
I have tried to use jdk1.3 ,jdk1.4 ,but I got same error.
Thank for any response !

Answer 1

Not recently. Most of that class has been depricated.