Capture webcam success! Now how to make it repeat itself??

Question

I have a code which captures my webcam and saves (and displays) a jpg image.
However, I want to make it so my code captures my webcam once every second or so.
Wait one second ---> Capture image -----> save (replace) over the previous image ------> do it again...
My current code is as follows:
import javax.swing.*;
import javax.swing.event.*;
import java.io.*;
import javax.media.*;
import javax.media.format.*;
import javax.media.util.*;
import javax.media.control.*;
import javax.media.protocol.*;
import java.util.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import com.sun.image.codec.jpeg.*;
public class camagain extends Panel implements ActionListener
     public static Player player;
     public CaptureDeviceInfo DI;
     public MediaLocator ML;
     public JButton CAPTURE;
     public Buffer BUF;
     public Image img;
     public VideoFormat VF;
     public BufferToImage BtoI;
     public ImagePanel imgpanel;
     public camagain()
          setLayout(new BorderLayout());
          setSize(320,550);
          imgpanel = new ImagePanel();
          CAPTURE = new JButton("Capture");
          CAPTURE.addActionListener(this);
          String str1 = "vfw:Logitech USB Video Camera:0";
          String str2 = "vfw:Microsoft WDM Image Capture (Win32):0";
          DI = CaptureDeviceManager.getDevice(str2);
          ML = new MediaLocator("vfw://0");
          try
               player = Manager.createRealizedPlayer(ML);
               player.start();
               Component comp;
               if( (comp = player.getVisualComponent()) != null )
                    add(comp,BorderLayout.NORTH);
               add(CAPTURE,BorderLayout.CENTER);
               add(imgpanel,BorderLayout.SOUTH);
          catch (Exception e)
               e.printStackTrace();
     public static void main(String[] args)
          Frame f = new Frame("SwingCapture");
          SwingCapture cf = new SwingCapture();
          f.addWindowListener(new WindowAdapter()
               public void windowClosing(WindowEvent e)
                    playerclose();
                    System.exit(0);
          f.add("Center",cf);
          f.pack();
          f.setSize(new Dimension(320,550));
          f.setVisible(true);
     public static void playerclose()
          player.close();
          player.deallocate();
     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);
               // show the image
               imgpanel.setImage(img);
               // save image
               saveJPG(img,"c:\\test.jpg");
     class ImagePanel extends Panel
          public Image myimg = null;
          public ImagePanel()
               setLayout(null);
               setSize(320,240);
          public void setImage(Image img)
               this.myimg = img;
               //repaint();
          public void paint(Graphics g)
               g.drawImage(myimg, 0, 0, this);
     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);
          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");
}Please help me.

Answer 1

import javax.swing.*;
import javax.swing.event.*;
import java.io.*;
import javax.media.*;
import javax.media.format.*;
import javax.media.util.*;
import javax.media.control.*;
import javax.media.protocol.*;
import java.util.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import com.sun.image.codec.jpeg.*;
public class camagain extends Panel implements ActionListener {
    public static Player player;
    public CaptureDeviceInfo DI;
    public MediaLocator ML;
    public JButton CAPTURE;
    public Buffer BUF;
    public Image img;
    public VideoFormat VF;
    public BufferToImage BtoI;
    public ImagePanel imgpanel;
    public javax.swing.Timer timer = new javax.swing.Timer(200, this); // 200ms is too fast increase it to suit your need
    public camagain() {
        setLayout(new BorderLayout());
        setSize(320, 550);
        imgpanel = new ImagePanel();
        CAPTURE = new JButton("Capture");
        CAPTURE.addActionListener(this);
        String str1 = "vfw:Logitech USB Video Camera:0";
        String str2 = "vfw:Microsoft WDM Image Capture (Win32):0";
        DI = CaptureDeviceManager.getDevice(str2);
        ML = new MediaLocator("vfw://0");
        try {
            player = Manager.createRealizedPlayer(ML);
            player.start();
            Component comp;
            if ((comp = player.getVisualComponent()) != null) {
                add(comp, BorderLayout.NORTH);
            add(CAPTURE, BorderLayout.CENTER);
            add(imgpanel, BorderLayout.SOUTH);
            Thread.sleep(5000);     // this is important, otherwise you may get NPE somewhere, needs polishing ;-)
            timer.start();                // start timer
        } catch (Exception e) {
            e.printStackTrace();
    public static void main(String[] args) {
        Frame f = new Frame("SwingCapture");
        camagain cf = new camagain();   // I didn't had 'SwingCapture, so I added camgain.....
        f.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                playerclose();
                System.exit(0);
        f.add("Center", cf);
        f.pack();
        f.setSize(new Dimension(320, 550));
        f.setVisible(true);
    public static void playerclose() {
        player.close();
        player.deallocate();
    public void actionPerformed(ActionEvent e) {
        if (e.getSource() instanceof JComponent) {
            JComponent c = (JComponent) e.getSource();
            if (c == CAPTURE) {
                action();  // maoved every thing to new method action()
        } else if (e.getSource() instanceof javax.swing.Timer) {
            action();       // timer event , call action() again
    public void action() {    // your action handler code.....
        // 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);
        // show the image
        imgpanel.setImage(img);
        // save image
        saveJPG(img, "d:\\test.jpg");
    class ImagePanel extends Panel {
        public Image myimg = null;
        public ImagePanel() {
            setLayout(null);
            setSize(320, 240);
        public void setImage(Image img) {
            this.myimg = img;
            repaint();
        public void paint(Graphics g) {
            super.paint(g);
            g.drawImage(myimg, 0, 0, this);
    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);
        } 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");
}