Playing and recording

Question

Hi,
I'm writing an application which is supposed to capture video from a webcam, copy it into a file and give the opportunity to watch the video at the same time. I've been able to do these tasks separately but when I try to get them together, catastrophe! BElow is the code:
import java.lang.*;
import java.io.*;
import javax.media.*;
import javax.media.protocol.*;
import javax.swing.*;
import java.util.*;
import javax.media.format.*;
import java.awt.*;
import java.awt.event.*;
import javax.media.bean.playerbean.*;
import com.sun.media.protocol.vfw.VFWCapture;
public class Testeur{
boolean ready=false;
String filename;
javax.media.protocol.DataSource datasource; //attach�e � la webcam
MediaLocator source; //adresse de la webcam
Processor p; //encode en quicktime le produit de datasource
DataSource dsource; //sortie du processeur vers le datasink qui enregistre dans le fichier
MediaLocator dest; //path du fichier de destination
DataSink filewriter;
DataSource ds2;
Vector devices;
public static void main(String []a)     {
     Testeur ts=new Testeur();
     while(!ts.ready){}
     System.out.println("we are ready");
     //create the thread which will take care of the affichage of the flux.
//     Afficheur aff=new Afficheur(ts);
//     System.out.println("displayer created");
//     aff.run();
public DataSource createDSClone(){
     DataSource newbie=null;
     try{
          //newbie=ds2.createClone();//the clone problem
          newbie=Manager.createCloneableDataSource(datasource);
          if(newbie!=null) System.out.println("newbie created!");
          System.out.println("could not clone datasource");
     catch(Exception e){
          System.out.println("exception while cloning datasource");
     return newbie;
     public Testeur(){
     String filename;
javax.media.protocol.DataSource datasource; //attach�e � la webcam
MediaLocator source; //adresse de la webcam
Processor p; //encode en quicktime le produit de datasource
DataSource dsource; //sortie du processeur vers le datasink qui enregistre dans le fichier
MediaLocator dest; //path du fichier de destination
DataSink filewriter;
Vector devices;
     VideoFormat vidformat = new VideoFormat(VideoFormat.RGB);
devices = CaptureDeviceManager.getDeviceList(vidformat);
CaptureDeviceInfo di = null;
if (devices.size() > 0){
          di = (CaptureDeviceInfo) devices.elementAt(0);
          System.out.println("informations :name [] "+di.getName()+" ;;locator [] "+di.getLocator().toString());
else {
JOptionPane.showMessageDialog(null,"Your camera is not connected", "No webcam found", JOptionPane.WARNING_MESSAGE);
System.exit(1);
try{
          //source=di.getLocator();
          //source= new MediaLocator("vfw:Microsoft WDM Image Capture:0");
          source= new MediaLocator("vfw://0RGB");
          System.out.println("Tasker2: locator "+di.getLocator().toString());//ok
          datasource=Manager.createDataSource(source);//does not pass this point
          System.out.println("datasource created!");
          //datasource=Manager.createCloneableDataSource(datasource);
     //     System.out.println("cloneable datasource created!!");
*Le processeur va prendre la sortie de datasource, l'encoder en QuickTime
*Puis, le DataSink va �crire le fichier .mov localis� en dest � partir des
*donn�es  recueillies de source
     try {
          p=Manager.createProcessor(datasource);
     do{
synchronized(p){
     System.out.println("processor created");
     Thread.sleep(20000);
          p.configure();
while(p.getState()!=Processor.Configured){
          p.wait(10000);
p.setContentDescriptor(new FileTypeDescriptor(FileTypeDescriptor.QUICKTIME));
     System.out.println("processor configured");
     break;
while(!Thread.currentThread().isInterrupted());
     System.out.println("starting the wait cycle...");
     try{
     //processor configured, put record code here
     try{
          p.realize();
          do{
synchronized(p){
     System.out.println("processor in the realizing process...");
     Thread.sleep(20000);
while(p.getState()!=Processor.Realized){
          p.wait(10000);
     System.out.println("processor realized");
     break;
while(!Thread.currentThread().isInterrupted());
     if(p.getState()!=Processor.Realized){
          System.out.println("not realized after 100s");
          System.out.println("current state :"+p.getState());
          System.out.println("configured "+p.Configured);
          System.out.println("realizing "+p.Realizing);
          System.out.println("realized "+p.Realized);
          System.exit(1);
     catch(Exception e){
          System.out.println("error while waiting for processor to realize");
          System.out.println("Message : "+e.getMessage()+" exception of type: "+e.getClass().getName());
          datasource.disconnect();
          System.exit(1);
     dsource = p.getDataOutput();
     dest= new MediaLocator( "file:output2.mov" );//instead, use filename variable
     System.out.println("destination media locator created!");
     filewriter = null;
          try {
          filewriter = Manager.createDataSink( dsource, dest );
          if(filewriter!=null) System.out.println("datasink created!");//ok
          filewriter.open();
          System.out.println("open...");
          filewriter.start();
          System.out.println("started...");//ok
          //ready=true;
          Afficheur aff=new Afficheur(this);//never displays, now!
     System.out.println("displayer created");
     aff.run();
          catch ( Exception e ) {
               JOptionPane.showMessageDialog(null,
     "Exception : " + e.getMessage(), "Error", JOptionPane.WARNING_MESSAGE);
                         System.out.println("problem: "+e.getCause().getClass().getName());
                    datasource.stop();
                    datasource.disconnect();
                    System.exit(1);
     p.start();
          try {
               Thread.currentThread().sleep(300000);
          catch (InterruptedException ie) {
          System.out.println("problem prob");
     System.out.println("All done!!");
     //release the ressources
filewriter.stop();
filewriter.close();
p.stop();
p.close();
datasource.stop();
datasource.disconnect();
     catch(Exception prc){
          System.out.println("problem configuring processor.");
     catch ( Exception e ) {
          System.out.println("processor problem"+e.getMessage()+" exception of type: "+e.getClass().getName());
          Thread.sleep(50000);
     catch (Exception e) {//pierre d'achoppement leads me here
JOptionPane.showMessageDialog(null,
"Exception locating media: " + e.getMessage(), "Error", JOptionPane.WARNING_MESSAGE);
System.exit(1);
import java.lang.*;
import java.io.*;
import javax.media.*;
import javax.media.protocol.*;
import javax.swing.*;
import java.util.*;
import javax.media.format.*;
import javax.media.bean.playerbean.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class Afficheur extends JFrame implements Runnable , ActionListener {
     Testeur ts;
     MediaPlayer player;
     MediaLocator ml;
     DataSource ds;
     //GUI
     JButton bView, quit;
     JPanel p;
     JComboBox cbx;
     public Afficheur(Testeur testeur){
     super("affichage de flux live");
     ts=testeur;
     //ds=ts.createDSClone();
     ml=ts.source;
     System.out.println("source : "+ml.toString());
     if(ds==null)
     System.out.println("unable to create the clone to the original datasource");//problem source
     //create the GUI
          p=new JPanel(new GridLayout(2,3));
          bView=new JButton("Visualiser camera");
          String [] albus={"vfw:Microsoft WDM Image Capture:0","meenie","minie","moe"};
          cbx=new JComboBox(albus);     
          p.add(cbx)     ;
          p.add(bView);
          setContentPane(p);
          this.setBounds(50,50,100,100);
          bView.addActionListener(this);
     //this.run();
     public void run(){
          //show the GUI and wait for orders.
     this.setVisible(true);     
     public void actionPerformed(ActionEvent e){
          JButton origin= (JButton)e.getSource();
               //determine which cam is selected and launch the player.
          if(origin==bView){
               System.out.println("you are about to view the flux");
               try{
          //     player=new MediaPlayer();//1)
               //player= (MediaPlayer)Manager.createRealizedPlayer(ds);// 2)
               player= (MediaPlayer)Manager.createRealizedPlayer(ml);
               System.out.println("player created");
               Thread.sleep(10000);
               *2) when done this way, we get to the catch clause,
               *with a null message.
               *today, we have a mass exception!
               //player.setDataSource(ds);
               player.setFixedAspectRatio(true);
               player.setBounds(10,10,150,150);
               player.realize();
System.out.println("waiting for player to realize...");
*we keep on waiting here until the Testeur finishes record the 300s of movie
               player.waitForState(300);
               System.out.println("player realized");
               this.getContentPane().add(player.getVisualComponent());
               setBounds(0,0,170,180);
               setVisible(true);
               System.out.println("about to start the player...");
               player.start();
               }catch(Exception et){
                    System.out.println("problem: "+et.getMessage());
                    System.out.println("problem: "+et.toString());
                    System.out.println("problem: "+et.getCause().getClass().getName());
          else{
               if(origin==quit){
                         player.stop();
                         player.close();
                         this.dispose();
Problems:
1)the file cannot be viewed with any of the players I have on my computer: Windows Media Player and Real Player fail to play it. Even JMStudio can't!!
2) when I click on the button to display the video, a null exception is thrown. sometimes, there's a message sayiong the player could not be created.
I'm completely confused with this thing. Advice would be very appreciated!
Thanks!

Answer 1

Hi Mustansar,
I have got the same problem. I use a clone datasource too, but I can not save anything.
Have you resolve it?
If yes, tell me like please
Thanks a lot