Processor.getVisualComponent

Question

hi,
i have a problem with the method getVisualComponent called by an instance of a processor.. the error return a null pointer exception. I don't know why because if i used a player with the same configuration, it's ok.
Please help me

Answer 1

Code snippets
private void addMyCamera() throws Exception
     Vector vCDs = CaptureDeviceManager.getDeviceList(null); //     get Devices supported
     Iterator iTCams = vCDs.iterator();
     while(iTCams.hasNext())
         CaptureDeviceInfo cDI = (CaptureDeviceInfo)iTCams.next();
         if(cDI.getName().startsWith("vfw:"))
          MediaLocator mL = cDI.getLocator();
          DataSource dS = Manager.createCloneableDataSource(Manager.createDataSource(mL));
          Player player = Manager.createPlayer(dS);
          if(player != null)
              cameras.addPlayerDataSource(new PlayerDataSource(true, player, dS, "My Camera"));
              player.addControllerListener(this);
              player.realize();
          validate();
          break;
     *     ControllerListener
    public void controllerUpdate(ControllerEvent e)
     Player p = (Player)e.getSourceController();
     if(p == null)
         return;
     if(e instanceof RealizeCompleteEvent)
         System.out.println("Received - RealizeCompleteEvent");
         try{
          Component c = p.getVisualComponent();
          if(c != null)
              cameras.addVideoPlayer(p);
          else
              //     we can presume this is the Audio Channel
              cameras.addAudioControl(p);
         }catch(Exception eX){
          eX.printStackTrace();
         validate();
         p.start();
     else if(e instanceof EndOfMediaEvent)
//         System.out.println("Received - EndOfMediaEvent");
         if(cameras.isLooped(p))
          p.setMediaTime(new Time(0));
          p.start();
    }PlayerDataSource is a class I use to manage several object so that i can access them from various GUI events like Record/Broadcast
different class from above
public void startRecording() throws Exception
     bRecording = true;
     DataSource dS = ((SourceCloneable)dataSource).createClone();
     Processor p = Manager.createProcessor(dS);
     p.addControllerListener(this);
     p.configure();
   public void controllerUpdate(ControllerEvent e)
     if(e instanceof EndOfMediaEvent)
         Player p = (Player)e.getSourceController();
         if(p == null)
          return;
         if(e instanceof EndOfMediaEvent)
          p.setMediaTime(new Time(0));
          p.start();
     else if(e instanceof ConfigureCompleteEvent)
         Processor p = (Processor)e.getSourceController();
         try{
          System.out.println("Configured");
          p.setContentDescriptor(new FileTypeDescriptor(FileTypeDescriptor.MSVIDEO));
          p.realize();
         }catch(Exception eX){
          eX.printStackTrace();
     else if(e instanceof RealizeCompleteEvent)
         Processor p = (Processor)e.getSourceController();
         if( bRecording)
          String sC = getCameraCaption();
          System.out.println("startRecording CameraView '" + sC + "'");
          try{
              GregorianCalendar gC = new GregorianCalendar();
              File f = new File(sC + "_" + gC.get(Calendar.YEAR) + gC.get(Calendar.MONTH) +
               gC.get(Calendar.DAY_OF_MONTH) + gC.get(Calendar.HOUR_OF_DAY) +
               gC.get(Calendar.MINUTE) + gC.get(Calendar.SECOND) + ".mov");
              MediaLocator mL = new MediaLocator(f.toURL());
              dataSink = Manager.createDataSink(p.getDataOutput(), mL);
              dataSink.open();
              dataSink.start();
              p.start();
          }catch(Exception eX){
              eX.printStackTrace();
    }