熟悉JMF的帮我看下，谢谢！！！

从SUN的官方网站上下了代码下来
http://java.sun.com/products/java-media/jmf/2.1.1/solutions/AVTransmit.html
http://java.sun.com/products/java-media/jmf/2.1.1/solutions/AVTReceiver.html

可是运行出现了这样的错误：

 传输端：rack 0 is set to transmit as:
  mpegaudio/rtp, 44100.0 Hz, 16-bit, Stereo, LittleEndian, Signed, 16000.0 frame rate, FrameSize=32768 bits
Error : Can't open local data port: 42050
接受端：- Open RTP session for: addr: 127.0.0.1 port: 42050 ttl: 1
  - Open RTP session for: addr: 127.0.0.1 port: 42060 ttl: 1
  - Waiting for RTP data to arrive..

从提示信息来说是端口冲突了，怎么解决。谢谢！！！

Error : Can't open local data port: 42050 
查一下该端口是否被占用，关掉相关软件，或者把rtp协议的端口改了