Problème de capture d'image à partir de la webcam
Salut,
Je développe une petite application qui doit lire la webcam de mon ordinateur pour prendre des photos et les enregistrer dans le disque. J’ai pris un code sur le net, j’ai installé toutes les librairies nécessaires mais je n’arrive toujours pas à ma fin.
Voici le code que j’ai utilisé, sachant que j’utilise l’API JMF pour lire à partir de ma webcam :
Code:
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|
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Panel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.image.BufferedImage;
import java.io.FileOutputStream;
import javax.media.Buffer;
import javax.media.CaptureDeviceInfo;
import javax.media.CaptureDeviceManager;
import javax.media.Manager;
import javax.media.MediaLocator;
import javax.media.Player;
import javax.media.control.FrameGrabbingControl;
import javax.media.format.VideoFormat;
import javax.media.util.BufferToImage;
import javax.swing.JButton;
import javax.swing.JComponent;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
public class WebcamCapture 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 WebcamCapture() {
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("Webcam Capture");
WebcamCapture cf = new WebcamCapture();
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_RGB);
Graphics2D g2 = bi.createGraphics();
g2.drawImage(img, null, null);
FileOutputStream out = null;
try {
out = new FileOutputStream(s);
} catch (java.io.FileNotFoundException io) {
io.printStackTrace();
System.out.println("File Not Found");
}
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bi);
param.setQuality(1.0f, false);
encoder.setJPEGEncodeParam(param);
try {
encoder.encode(bi);
out.close();
} catch (java.io.IOException io) {
io.printStackTrace();
System.out.println("IOException");
}
}
} |
Et voici le message d’erreur qui m’est balancé :
Code:
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java.io.IOException: Could not connect to capture device
java.io.IOException: Could not connect to capture device
javax.media.NoPlayerException: Error instantiating class: com.sun.media.protocol.vfw.DataSource : java.io.IOException: Could not connect to capture device
at javax.media.Manager.createPlayerForContent(Manager.java:1362)
at javax.media.Manager.createPlayer(Manager.java:417)
at javax.media.Manager.createRealizedPlayer(Manager.java:553)
at webcam.WebcamCapture.<init>(WebcamCapture.java:68)
at webcam.WebcamCapture.main(WebcamCapture.java:84) |
Votre aide me sera vraiment la bienvenue et utile…
Merci d'avance
