How to record desktop with jmf?

Question

Hi, i'm new using jmf, so if it's a simple issue i don't know :S
I'm trying to make an app that record the desktop. I have found this:
http://java.sun.com/javase/technologies/desktop/media/jmf/2.1.1/solutions/JVidCap.html
But when i run it:
"! No Devices for RGB, 160x120, FrameRate=15.0"
And a NullPointerException if i push "Start" button.
I tried to change the code, video formats, etc... but nothing successful happened. what's the problem? what's means these error and how to solve it?
Regards.

Answer 1

But... i'm not sure how to use it :PMake your own class.... I am posting this class (just for demo):
* This class uses custom DataSource given at Sun JMF solutions page:
* <a href="http://java.sun.com/javase/technologies/desktop/media/jmf/2.1.1/solutions/ScreenGrabber.html">Screen Grabber</a>
* @author talha
public class ScreenCapture extends JFrame {
    Player p;
    public ScreenCapture() {
        super("Screen Capture");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        try {
            p = Manager.createRealizedPlayer(Manager.createDataSource(new MediaLocator("screen://0,0,640,480/10")));
        } catch (Exception ex) {
            Logger.getLogger(ScreenCapture.class.getName()).log(Level.SEVERE, null, ex);
        if(p.getVisualComponent()!=null)getContentPane().add(p.getVisualComponent());
        p.start();
        pack();
        setLocationRelativeTo(null);
    public static void main(String args[]){
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                new ScreenCapture().setVisible(true);
With this can i read data? I suppose that i can write it to disk directly or not? (replace System.out with an OutpuStream) No, if you want to write the captured video to the disk, you would have to make a Processor and DataSink... if these terms sound new, then you would have to learn JMF. Writing the captured video to disk has been asked many times, my suggestion: search this forum.
Thanks!