[JMF] faire une action à chaque nouvelle frame de la webcam

Bonjour,

J'aimerais faire du traitement d'image dès que la webcam met à jour des images. J'ai bien essayé de lancer une thread parallèlement à player.start(); mais ça ne marche pas comme je veux... Voici le code qui marche (donc sans la thread)...
Code:
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import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Frame;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Panel;
import java.awt.color.ColorSpace;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.image.BufferedImage;
import java.awt.image.BufferedImageOp;
import java.awt.image.ColorConvertOp;
import java.io.FileOutputStream;
 
import javax.media.Buffer;
import javax.media.CaptureDeviceInfo;
import javax.media.CaptureDeviceManager;
import javax.media.Manager;
import javax.media.MediaLocator;
import javax.media.Player;
import javax.media.control.FrameGrabbingControl;
import javax.media.format.VideoFormat;
import javax.media.util.BufferToImage;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JPanel;
 
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
 
public class SwingCapture extends Panel implements ActionListener {
	private static final long serialVersionUID = 1L;
 
	public Player player = null;
	public CaptureDeviceInfo di = null;
	public MediaLocator ml = null;
	public JButton capture = null;
	public Buffer buf = null;
	public Image img = null;
	public VideoFormat vf = null;
	public BufferToImage btoi = null;
 
	public ImagePanel imgpanel = null;
	public ImagePanel imgpanelout = null;
 
	public SwingCapture() {
		setLayout(new BorderLayout());
		imgpanel = new ImagePanel();
		imgpanelout = new ImagePanel();
		capture = new JButton("Capture");
		capture.addActionListener(this);
 
		try {
			CaptureDeviceInfo deviceInfo = CaptureDeviceManager
					.getDevice("vfw:Microsoft WDM Image Capture (Win32):0");
			player = Manager.createRealizedPlayer(deviceInfo.getLocator());
			player.start();
			Component comp = player.getVisualComponent();
			if (comp != null) {
				add(comp, BorderLayout.WEST);
			}
 
			add(capture, BorderLayout.CENTER);
 
			JPanel out = new JPanel();
			out.add(imgpanel, BorderLayout.CENTER);
			out.add(imgpanelout, BorderLayout.SOUTH);
 
			add(out, BorderLayout.EAST);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
 
	public static void saveJPG(Image img, String s) {
		BufferedImage bi = new BufferedImage(img.getWidth(null), img
				.getHeight(null), BufferedImage.TYPE_INT_RGB);
		Graphics2D g2 = bi.createGraphics();
		g2.drawImage(img, null, null);
 
		FileOutputStream out = null;
		try {
			out = new FileOutputStream(s);
			JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
			JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bi);
			param.setQuality(0.5f, false);
			encoder.setJPEGEncodeParam(param);
			try {
				encoder.encode(bi);
				out.close();
			} catch (java.io.IOException io) {
				System.out.println("IOException");
			}
		} catch (java.io.FileNotFoundException io) {
			System.out.println("File Not Found");
		}
	}
 
	public void actionPerformed(ActionEvent e) {
		JComponent c = (JComponent) e.getSource();
		if (c == capture) {
			// Grab a frame
			FrameGrabbingControl fgc = (FrameGrabbingControl) player
					.getControl("javax.media.control.FrameGrabbingControl");
			buf = fgc.grabFrame();
 
			// Convert it to an image
			btoi = new BufferToImage((VideoFormat) buf.getFormat());
			img = btoi.createImage(buf);
 
			img = convertToGrayscale((BufferedImage) img);
			imgpanel.setImage(img);
			saveJPG(img, "test.jpg");
		}
	}
 
	public void playerclose() {
		player.close();
		player.deallocate();
	}
 
	public BufferedImage convertToGrayscale(BufferedImage source) {
		BufferedImageOp op = new ColorConvertOp(ColorSpace
				.getInstance(ColorSpace.CS_GRAY), null);
		return op.filter(source, null);
	}
 
	public static void main(String[] args) {
		Frame f = new Frame("SwingCapture");
		final SwingCapture cf = new SwingCapture();
 
		f.addWindowListener(new WindowAdapter() {
 
			@Override
			public void windowClosing(WindowEvent e) {
				cf.playerclose();
				System.exit(0);
			}
		});
 
		f.add("Center", cf);
		f.pack();
		f.setVisible(true);
	}
}
Je réussis par exemple à traiter mon image quand je clique sur le bouton mais j'aimerais automatiser le processus...

Merci d'avance