Green screen before mpg execution

Question

Hello,
I'm trying to play an mpg video in loop with the following code:
public class JMPanel extends JPanel implements ControllerListener {
     public JMPanel() {
          super(true);
          this.setBackground(Color.black);
     public void initPlayer(String url) {
          setLayout(new BorderLayout());
          try {
               URL mediaURL = new URL(url);
               if(mplayer!=null)mplayer.close();
               mplayer = Manager.createPlayer(mediaURL);
               mplayer.addControllerListener(this);
          catch (Exception e) {
     public void start(String path, boolean loop) throws InterruptedException {
          this.loop = loop;
          this.removeAll();
          this.initPlayer(path);
          mplayer.start();
     public void controllerUpdate(ControllerEvent event) {
          if(event instanceof StopEvent){
               //System.out.println("stopp");
               if(loop){
                    mplayer.setMediaTime(new Time(0));
                    mplayer.start();
}Before the first execution there is a green screen (around 1 second), however the following loops work fine.
How can avoid this green screen?
Thanks in advance!
Paolo

Answer 1

It seems to be part of the file as it shows when playing direct on QuickTime. Interestingly there's no green screen when the same file is played on another computer. And it didn't happen on this computer before re-install. Also, when the same files are played in QuickTime the QT pane reduces in size to smallest possible in the first few seconds of playing. If I enter full screen, the pane size doesn't reduce.