jmf-请问怎样从一个视频设备获取视频信息存入文件

Question

你下载一份jmf的api文档，上面有很清楚的例子。

Answer 1

我成功了但是文档当中的传递媒体流的程序实现不了我刚开始学习jmf不知道怎么改动
    错误在于 Processor 的p.configure()执行以后不能够被正确配置，下一句程序说没有配置好所以不能够执行。   
  public void dosend()
{
      Processor p=null;
          // First find a capture device that will capture linear audio
         // data at 8bit 8Khz         AudioFormat format= new AudioFormat(AudioFormat.LINEAR,
                                             8000,
                                             8,
                                             1);         Vector devices= CaptureDeviceManager.getDeviceList( format);
         CaptureDeviceInfo di= null;
         if (devices.size() > 0) {
              di = (CaptureDeviceInfo) devices.elementAt(0);
             System.out.print(di.getName());
         }
         else {
             // exit if we could not find the relevant capturedevice.
             System.exit(-1);
         }         // Create a processor for this capturedevice & exit if we
         // cannot create it
         try {             p=Manager.createProcessor(di.getLocator());         } catch (IOException e) {
             System.exit(-1);
         } catch (NoProcessorException e) {
             System.exit(-1);
         }        // configure the processor
     try{       p.configure();
       // p.realize();
     }
     catch(Exception eee)
     {
      System.out.print(eee);
     }       System.out.print(p.getState());
       System.out.print(p.Configuring);
     //   System.out.print(p.getContentDescriptor().toString());
        // block until it has been configured     //   test.setContentDescriptor(
   //         new ContentDescriptor( ContentDescriptor.RAW));
       System.exit(-1);
        /*TrackControl track[] = p.getTrackControls();        boolean encodingOk = false;        // Go through the tracks and try to program one of them to
        // output gsm data.         for (int i = 0; i < track.length; i++) {
             if (!encodingOk && track[i] instanceof FormatControl) {
                 if (((FormatControl)track[i]).
                     setFormat( new AudioFormat(AudioFormat.GSM_RTP,
                                                8000,
                                                8,
                                                1)) == null) {                    track[i].setEnabled(false);
                 }
                 else {
                     encodingOk = true;
                 }
             } else {
                 // we could not set this track to gsm, so disable it
                 track[i].setEnabled(false);
             }
         }         // At this point, we have determined where we can send out
         // gsm data or not.
         // realize the processor
         if (encodingOk) {
            p.realize();
             // block until realized.
             // get the output datasource of the processor and exit
             // if we fail
             DataSource ds = null;             try {
                 ds = p.getDataOutput();
             } catch (NotRealizedError e) {
                 System.exit(-1);
             }             // hand this datasource to manager for creating an RTP
             // datasink our RTP datasimnk will multicast the audio
             try {
                 String url= "rtp://224.144.251.104:49150/audio/1";                 MediaLocator m = new MediaLocator(url);                 DataSink d = Manager.createDataSink(ds, m);                 d.open();
                 d.start();
             } catch (Exception e) {
                 System.exit(-1);
             }
     }    */}