Receiving Video RTP Stream (JMF) in JME ( MMAPI ) - URGENT !!!

Question

Hi Folks...
I�m trying to develop an application that sends the images from a web cam connected to the computer, to the PDA that the images can be viewed by the user...
My code for the JMF RTP Video Stream is as follows.
Processor proc = null;
          javax.media.protocol.DataSource ds = null;
          TrackControl[] tc = null;
          int y;
          boolean encodingOk = false;
          Vector<javax.media.protocol.DataSource> datasources = new Vector<javax.media.protocol.DataSource>();
          for( int x = 0 ; x < camerasInfo.length ; x++ ){
               try {
                    proc = Manager.createProcessor(camerasInfo[x].getLocator());
               }catch (NoProcessorException e) { System.out.println("Erro ao int�nciar PROCESSOR: " + e);     }
                catch (IOException e) { System.out.println("Erro ao int�nciar PROCESSOR: " + e); }
               proc.configure();
               try {
                    Thread.sleep(2000);
               } catch (InterruptedException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
               proc.setContentDescriptor( new ContentDescriptor(ContentDescriptor.RAW_RTP) );
               tc = proc.getTrackControls();
               for( y = 0; y < tc.length ; y++ ){
                    if (!encodingOk && tc[y] instanceof FormatControl){
                         if( ( (FormatControl) tc[y] ).setFormat( new VideoFormat(VideoFormat.RGB) ) != null ){
                              tc[y].setEnabled(true);                              
                         }else{
                              encodingOk = true;
                    }else{
                         tc[y].setEnabled(false);
               proc.realize();
               try {
                    Thread.sleep(2000);
               } catch (InterruptedException e1) {
                    e1.printStackTrace();
               try{
                    ds = proc.getDataOutput();
               }catch(NotRealizedError e){
                    System.out.println("ERRO ao realizar datasource: " + e);
               }catch(ClassCastException e){
                    System.out.println("Erro ao realizar datasource: " + e);
               datasources.add(ds);
               System.out.println( ds.getLocator() );
               encodingOk = false;
          MediaLocator ml = new MediaLocator("rtp://10.1.1.100:99/video");
          try {
               DataSink datSink = Manager.createDataSink(ds , ml);
               datSink.open();
               datSink.start();
          } catch (NoDataSinkException e) {
               System.out.println("Erro ao instanciar DataSink: " + e );
          } catch (SecurityException e) {
               System.out.println("Erro ao iniciar DataSink: " + e);
          } catch (IOException e) {
               System.out.println("Erro ao iniciar DataSink: " + e);
          }I�m not sure if this code is correctly... it is ?
So... the next part of the systems runs on the PDA..
The code that access this RTP Stream is as follows..
          VideoControl c = null;
          try {
               player = Manager.createPlayer("rtp://10.1.1.100:99/video");
               c = (VideoControl) player.getControl("VideoControl");
               tela = (Item) c.initDisplayMode( GUIControl.USE_GUI_PRIMITIVE, null);
               player.start();
               append(tela);
          } catch (IOException e) {
               str.setText(e.toString());
               append( str );
          } catch (MediaException e) {
               str.setText(e.toString());
               append( str );
          }So when the APP try to create a player for "rtp://10.1.1.100:99/video" an MediaException is throwed..
javax.microedition.media.MediaException: Unable to create Player for the locator: rtp://10.1.1.100:99/video
So... I don�t know what happen =/
The error is in the PDA module ? Or in the computer�s initialization off the RTP Video Streaming ?
I need finish this job at next week... so any help is usefull..
Waiting for answers
Rodrigo Kerkhoff

Answer 1

First of all: before going onto the j2me part, make sure the server works, before doing anything else! Apparently, it doesn't...
The MediaLocator is generally used to specify a kind of URL depicting where the data put into the datasink should go to. In your case, This cannot be just some URL where you want it to act as a rtps server. You'll need to implement that server yourself I guess.