Trying to overlay text onto images and save them.

Question

What I want: I have a computer running the media in my car and I want to hook up a camera to it that'll record when the computer is running and overlay the GPS speed onto the video for later viewing.
What I got: I have the following piece of code that saves a series of .jpg images at a specified frame rate and a separate Java application that puts them together into a .mov file to view later. I couldn't find anything to record the straight video so if you have any links for that, please point me. But for now I'll settle for doing it this way and I'm not too concerned with the GPS speed NMEA parsing for now, I'll just use a static speed label until I get the overlaying working.
What I need: I need to know what to plug into the speedOverlay() method in order to grab the image and put the speed on top of it before saving it and moving to the next image. Any ideas?
Code:
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
import com.sun.media.sound.Toolkit;
import javax.imageio.ImageIO;
import javax.media.*;
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.JTextField;
import javax.swing.JLabel;
import javax.swing.JPanel;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Panel;
import java.awt.Shape;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.font.TextLayout;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Timer;
import java.util.TimerTask;
public class SwingCapture1 extends Panel implements Runnable, ActionListener
     private static final long serialVersionUID = 1L;
     public static Player player = null;
     public CaptureDeviceInfo di = null;
     public MediaLocator ml = null;
     public JButton start = new JButton("START");
     public JButton stop = new JButton ("STOP NOW");
     public JLabel frequencyLabel = new JLabel("Frequency:");
     public JTextField frequencyInputField = new JTextField(5);
     public JLabel framerateLabel = new JLabel("Framerate: ");
     public JTextField framerateInputField = new JTextField(5);
     public JLabel timerLabel = new JLabel("Timer: ");
     public JTextField timerInputField = new JTextField(5);
     public JPanel southPanel = new JPanel();
     public static Buffer buf = null;
     public static Image img = null;
     public VideoFormat vf = null;
     public static BufferToImage btoi = null;
     public static ImagePanel imgpanel = null;
     public static Timer timer = new Timer();
     static int theFrameRate = 0;
     static int theTimeLength = 0;
     static int i = 0;
     static int interval = 0;
     int count = 0;
     static int timeLength = 0;
     static String filePrefix = "";
     static String imagesDirectory = "c:\\images\\";
     static boolean timerBoolean = true;
     Thread capThread;
     Toolkit toolkit;
     public SwingCapture1()
          setLayout(new BorderLayout());
//          setSize(640, 480);
          imgpanel = new ImagePanel();
          start.addActionListener(this);
          final String str = "vfw:Microsoft WDM Image Capture (Win32):0";
          di = CaptureDeviceManager.getDevice(str);
          ml = new MediaLocator(str);
          try
               player = Manager.createRealizedPlayer(ml);
               player.start();
               Component comp;
               if ((comp = player.getVisualComponent()) != null)
                    add(comp, BorderLayout.LINE_START);
//               add(capture);
               add(imgpanel, BorderLayout.LINE_END);
               add(southPanel, BorderLayout.SOUTH);
               southPanel.add(framerateLabel);
               southPanel.add(framerateInputField);
               southPanel.add(timerLabel);
               southPanel.add(timerInputField);
               southPanel.add(start);
               southPanel.add(stop);
          catch (final Exception e)
               System.out.println("ERROR 1");
               e.printStackTrace();
     public static void playerclose()
          player.close();
          player.deallocate();
     public void actionPerformed(final ActionEvent e)
          final JComponent c = (JComponent) e.getSource();
          if (c == start)
//               snapPicture();
               theFrameRate = Integer.parseInt(framerateInputField.getText());
               theTimeLength = Integer.parseInt(timerInputField.getText());
               startCapture(theFrameRate, theTimeLength);
          if (c == stop)
               timerBoolean = false;
     public void startCapture(final int framerate, final int timeLength)
          interval = 1000 / framerate;
          // Start timer.
          timer.scheduleAtFixedRate(new TimerTask ()
               public void run()
                    System.out.println("SNAP");
                    snapPicture();
                    count++;
                    if (count >= timeLength * framerate)
                         this.cancel();
          }, 1000, interval);
     public static void snapPicture()
          final 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:\\java\\Tomcat\\webapps\\loadimage\\main.jpg");
          i++;
          speedOverlay(img);
          saveJPG(img, imagesDirectory + filePrefix + i + ".jpg");
     public static void speedOverlay(Image img)
     public static void saveJPG(final Image img, final String s)
          final BufferedImage bi = new BufferedImage(img.getWidth(null), img.getHeight(null), BufferedImage.TYPE_INT_RGB);
          final Graphics2D g2 = bi.createGraphics();
          g2.drawImage(img, null, null);
          FileOutputStream out = null;
          try
               out = new FileOutputStream(s);
          catch (final java.io.FileNotFoundException io)
               System.out.println("ERROR 2");
               System.out.println("File Not Found");
          final JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
          final JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bi);
          param.setQuality(0.5f, false);
          encoder.setJPEGEncodeParam(param);
          try
               encoder.encode(bi);
               out.close();
          catch (final java.io.IOException io)
               System.out.println("ERROR 3");
               System.out.println("IOException");
     public void start()
          if (capThread == null)
               capThread = new Thread(this, "Capture Thread");
               capThread.start();
     public Image getFrameImage()
          // Grab a frame
          final FrameGrabbingControl fgc = (FrameGrabbingControl)
          player.getControl("javax.media.control.FrameGrabbingControl");
          buf = fgc.grabFrame();
          // Convert it to an image
          btoi = new BufferToImage((VideoFormat)buf.getFormat());
          return btoi.createImage(buf);
     @Override
     public void run() {
          // TODO Auto-generated method stub
}

Answer 1

Sorry guys, I haven't looked at your links yet but I will, once I get some time to sit down and code again. I just wanted to provide this piece of code that uses the Graphics2d you're talking about to overlay text onto an image but I haven't been able to plug it into my code at all. If you're links answer the question, I'm sorry, just providing it until I can actually sit down and spend time on the research you've given me. Thanks.
import java.awt.*;
import java.awt.font.*;
import java.awt.geom.*;
import java.awt.image.*;
import java.io.*;
import java.net.*;
import java.text.*;
import java.util.*;
import javax.imageio.*;
import javax.swing.*;
public class WaterMark {
    public static void main(String[] args) throws IOException {
         String speed = "50";
        URL url = new URL("file:c:\\images\\1.jpg");
        BufferedImage im = ImageIO.read(url);
        String text = speed + " Km/H";
        Graphics2D g = im.createGraphics();
//        g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
//        g.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
//        g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g.setFont(new Font("Lucida Bright", Font.ITALIC, 40));
//        g.rotate(-Math.PI/4, im.getWidth()/2, im.getHeight()/2);
        TextLayout tl = new TextLayout(text, g.getFont(), g.getFontRenderContext());
//        Rectangle2D bounds = tl.getBounds();
//        double x = (im.getWidth()-bounds.getWidth())/2 - bounds.getX();
//        double y = (im.getHeight()-bounds.getHeight())/2 - bounds.getY();
        double x = 10;
        double y = 50;
        Shape outline = tl.getOutline(AffineTransform.getTranslateInstance(x+2, y+1));
//        g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.3f));
        g.setPaint(Color.BLACK);
        g.draw(outline);
//        g.setPaint(new GradientPaint(0, 0, Color.WHITE, 30, 20, new Color(128,128,255), true));
        tl.draw(g, (float)x, (float)y);
        g.dispose();
        display(im);
    public static void display(BufferedImage image) {
        JFrame f = new JFrame("WaterMark");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(new JLabel(new ImageIcon(image)));
        f.pack();
        f.setLocationRelativeTo(null);
        f.setVisible(true);
}