使用JMF创建RTP流时出现问题

我正处于一个项目的早期阶段,这个项目要求使用RTP广播 DataStream 由A创建 MediaLocation . 下面是一些示例代码,这些代码当前在 rptManager.initalize(localAddress) 有了错误” 无法打开本地数据端口:XXXX “,具体来说:

Exception in thread "main" javax.media.rtp.InvalidSessionAddressException: Can't open local data port: 34586
at com.sun.media.rtp.RTPSessionMgr.initialize(RTPSessionMgr.java:2688)
at com.sun.media.rtp.RTPSessionMgr.initialize(RTPSessionMgr.java:2515)
at RTPBroadcast.main(RTPBroadcast.java:20)

我正在开发Lucid,我的防火墙完全被禁用。老实说,我有点为难。我的代码如下:

// http://jcs.mobile-utopia.com/jcs/26201_RTPManager.java
public class RTPBroadcast { 
    public static void main (String[] args) throws InvalidSessionAddressException, IOException, UnsupportedFormatException {

        RTPManager rtpManager = RTPManager.newInstance();
        SessionAddress localAddress = new SessionAddress();

        rtpManager.initialize(localAddress);

        InetAddress ipAddress = InetAddress.getByName("192.168.1.5");

        SessionAddress remoteAddress = new SessionAddress(ipAddress, 3000);

        rtpManager.addTarget(remoteAddress);

        DataSource dataOutput = new ScreenSource();

        SendStream sendStream = rtpManager.createSendStream( dataOutput, 1);
        sendStream.start();
    }
}

有什么可能导致这个问题的想法吗?