how to link on webcam from java application ?

[aldm]

Hi to all,

I'm making one application for video control in firm...what's the best way to make application which have to access to webcam? There should be option for watching videos from more cams in real time...I read something on google and I found that Swing framework has some options for this...

Thanks in advance

[peter_budo]

Have look on JTwain also there is plenty of resources in regards of Java Media Framework

[aldm]

Hi,

I found some code on the internet (application for linking on webcam). I modify it a little, but it doesn't work.
Code:

-----------------------------------------------------------

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 SwingCapture extends Panel implements ActionListener 
{
  public static 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 SwingCapture() 
  {
    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();
      try {
    	  Thread.sleep(1000);
    	  } 
      catch (Exception e) {
      }
      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) 
    {
      if (myimg != null) 
      {
        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_BGR);
    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"); 
    }
  }
  
}

---------------------------------------------------------------

It shows me a pink color space in the place where should show image.
I used JMF. I installed JMF and copie jmf.jar to lib folder of my project
The name of camera in JMF Registry is
vfw:Microsoft WDM Image Capture (Win32):0

Can somebody help me?

[sarxos]

Hi,

Some time ago I created generic Java library which can be used to take pictures with a PC webcam. The API is very simple, not overfeatured, can work standalone, but also supports additional webcam drivers like OpenIMAJ, JMF, FMJ, LTI-CIVIL, etc... and some web cameras (under development).

Link to the project is https://github.com/sarxos/webcam-capture

Documentation available here http://webcam-capture.sarxos.pl

Example code (take picture and save in test.png):

Webcam webcam = Webcam.getDefault();
BufferedImage image = webcam.getImage();
ImageIO.write(image, "PNG", new File("test.png"));

It is available in Maven Central repository as dependency:

<dependency>
    <groupId>com.github.sarxos</groupId>
    <artifactId>webcam-capture</artifactId>
    <version>0.3.2</version>
</dependency>

Or as a separate ZIP which includes all required dependencies and 3rd party JARs http://repo.sarxos.pl/maven2/com/github/sarxos/webcam-capture/0.3/webcam-capture-0.3-dist.zip

[gian88r]

click this link.. to have your own reference..
http://en.softonic.com/s/webcam-d-link-application:java