Image Capture problem(blank picture)

Question

hi, I am new to JMF and I have refer and read some of the tutorial of JMF. then I try with the image capture program but unlucky it's not success. I was able to success to compile the program and get an empty picture.The picture is blank when use.
here is my code so I hope i can get some advice on it. thank you
public class imageCapture extends Panel implements ActionListener{
public static Player player = null;
public CaptureDeviceInfo di = null;
public MediaLocator ml = null;
static Buffer buf = null;
static Image img = null;
public VideoFormat vf = null;
static BufferToImage btoi = null;
public imageCapture()
String str1 = "vfw:Microsoft WDM Image Capture (Win32):0";
di = CaptureDeviceManager.getDevice(str1);
ml = di.getLocator();
try
player = Manager.createRealizedPlayer(ml);
player.start();
Component comp;
if ((comp = player.getVisualComponent()) != null)
add(comp);
catch (Exception e)
public static void main(String[] args)
imageCapture imgc = new imageCapture();
// 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);
// save image
saveJPG(img,"c:\\pic123.jpg");
player.close();
public static void saveJPG(Image img, String s)
BufferedImage bi = new BufferedImage(500, 400 , BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = bi.createGraphics();
g2.drawImage(img, null, null);
FileOutputStream out = null;
try
out = new FileOutputStream(s);
catch (java.io.FileNotFoundException io)
System.out.println("File Not Found");
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");
public void actionPerformed(ActionEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}

Answer 1

Could be any number of things... most likely, it's just trying to capture an image before the webcam is setup and running.
Try putting in a wait statement (thread.currentthread.sleep) after you start the player to make it wait for, say, 5 seconds...see if that changes the output.