java jmf

Mam przykładowy kod na obraz z kamery -

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.Date;
 
import javax.imageio.ImageIO;
import javax.media.Buffer;
import javax.media.CaptureDeviceInfo;
import javax.media.CaptureDeviceManager;
import javax.media.Manager;
import javax.media.Player;
import javax.media.control.FrameGrabbingControl;
import javax.media.format.VideoFormat;
import javax.media.util.BufferToImage;
 
public class FrameGrab{
    public static void main(String[] args) throws Exception{
        CaptureDeviceInfo deviceInfo = CaptureDeviceManager.getDevice("vfw:Microsoft WDM Image Capture (Win32):0");
        Player player = Manager.createRealizedPlayer(deviceInfo.getLocator());
        player.start();
        
        Image img = null;
 
        while (img == null){
	        FrameGrabbingControl frameGrabber = (FrameGrabbingControl)player.getControl("javax.media.control.FrameGrabbingControl");
	        
	        Buffer buf = frameGrabber.grabFrame();
	 
	        img = (new BufferToImage((VideoFormat)buf.getFormat()).createImage(buf));
        }
        
        BufferedImage buffImg = new BufferedImage(img.getWidth(null), img.getHeight(null), BufferedImage.TYPE_INT_RGB);
        Graphics2D g = buffImg.createGraphics();
        g.drawImage(img, null, null);
 
        g.setColor(Color.RED);
        g.setFont(new Font("Verdana", Font.BOLD, 16));
        g.drawString((new Date()).toString(), 10, 25);
 
        ImageIO.write(buffImg, "png", new File("e:\\webcam.png"));
 
        player.close();
        player.deallocate();
        System.exit(0);
    }
}

i niestety przy starcie wyskakuje mi blad
Exception in thread "main" java.lang.NullPointerException
at probny2.Main.main(Main.java:31)
Java Result: 1
BUILD SUCCESSFUL (total time: 0 seconds

stworzylem bilblioteke jmf gdzie wrzycilem jary i dodalem je do projektu.
Co musze zrobic zeby zaskoczyl program...