Java多媒体应用JMF

用于现场拍照，生成照片，主要用到Java Media Framework(JMF)。

　　首先到SUN下载最新的JMF，然后安装。http://java.sun.com/products/java-media/jmf/index.jsp

      或者在我的附件里面找到JMF下载安装。

　　然后，说一下需求

　　1． 用摄像头拍照

　　2． 按下拍照按钮，获取摄像头内的图像

　　3． 保存为本地图像为jpg格式，不得压缩画质

      4.    如果对当前照片不满意，可以重新拍摄。

 

相信也是大家最感兴趣的部分也就是如何让一个摄像头工作，并拍下一张照片了。

 

下面是一个已经实现了的示例。

 

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Panel;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.File;

import javax.media.Buffer;
import javax.media.CannotRealizeException;
import javax.media.CaptureDeviceInfo;
import javax.media.CaptureDeviceManager;
import javax.media.Manager;
import javax.media.MediaLocator;
import javax.media.NoPlayerException;
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.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;

import com.sun.image.codec.jpeg.ImageFormatException;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;
import com.sun.image.codec.jpeg.JPEGImageEncoder;

public class GetPhoto extends JPanel implements ActionListener{

 private CaptureDeviceInfo captureDeviceInfo=null;
 private MediaLocator mediaLocator=null;
 private static Player player=null;
 private ImagePanel imagePanel=null;
 private JButton jbok,jbcancel;
 private Buffer buffer=null;
 private VideoFormat videoFormat=null;
 private BufferToImage bufferToImage=null;
 private Image image=null;
 private JPanel jp=new JPanel();
 
 public GetPhoto()
 {
  //setLayout(new BorderLayout());
  this.setLayout(null);
  setSize(300,500);
  String str="vfw:Microsoft WDM Image Capture (Win32):0";
  captureDeviceInfo=CaptureDeviceManager.getDevice(str);
  mediaLocator=new MediaLocator("vfw://0");
  imagePanel=new ImagePanel();
  jbok=new JButton("拍   照");
  jbcancel=new JButton("重   拍");
  jbok.addActionListener(this);
  jbcancel.addActionListener(this);
  
  try {
   player=Manager.createRealizedPlayer(mediaLocator);
   player.start();
   Component comp;
   if((comp=player.getVisualComponent())!=null)
   comp.setBounds(0, 0, 240, 180);
   this.add(comp);
  } catch (NoPlayerException e)
  {
   e.printStackTrace();
  } catch (CannotRealizeException e)
  {
   e.printStackTrace();
  } catch (IOException e)
  {
   e.printStackTrace();
  }  
  jp.add(jbok);
  jp.add(jbcancel);
  jp.add(imagePanel);
  jp.setBounds(0, 180, 240, 200);
  this.add(jp);

 }

 public void print(Graphics g)
 {
  super.print(g);
  g.setColor(new Color(255,0,0));
  g.drawLine(0, 0, 100, 100);
 }
 public void actionPerformed(ActionEvent e)
 {
  if(e.getSource()==jbok)
  {
   FrameGrabbingControl fgc=(FrameGrabbingControl)player.getControl("javax.media.control.FrameGrabbingControl");
   buffer=fgc.grabFrame();
   bufferToImage=new BufferToImage((VideoFormat)buffer.getFormat());
   image=bufferToImage.createImage(buffer);
   imagePanel.setImage(image);
   saveImage(image,"temp.jpg");
  }
  if(e.getSource()==jbcancel)
  {
   imagePanel.setImage(null);
  }
   
 }

 public static void saveImage(Image image,String path)
 {
   BufferedImage bi=new BufferedImage(image.getWidth(null),image.getHeight(null),BufferedImage.TYPE_INT_RGB);
   Graphics2D g2 = bi.createGraphics();
   g2.drawImage(image, null, null);
   FileOutputStream fos=null;
   
   try {
    fos=new FileOutputStream(path);

   } catch (FileNotFoundException e)
   {
    e.printStackTrace();
   }
   JPEGImageEncoder je=JPEGCodec.createJPEGEncoder(fos);
   JPEGEncodeParam jp=je.getDefaultJPEGEncodeParam(bi);
   jp.setQuality(1f, false);
   je.setJPEGEncodeParam(jp);
   try {
    je.encode(bi);
    fos.close();
   } catch (ImageFormatException e)
   {
    e.printStackTrace();
   } catch (IOException e)
   {
    e.printStackTrace();
   }

 }
 public static File getImage()
 {
  File f=new File("temp.jpg");
  return f;
  
 }
 
 class ImagePanel extends Panel
 {
   public Image myimg = null;

   public ImagePanel()
   {
    setLayout(null);
    setSize(240,180);
   }

   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 main(String[] args)
 {
  JFrame f = new JFrame("FirstCapture");
  GetPhoto cf = new GetPhoto();

  f.addWindowListener(new WindowAdapter() {
   public void windowClosing(WindowEvent e) {
    player.close();
   System.exit(0);}});

  f.add("Center",cf);
  f.pack();
  f.setBounds(100,100,240,550);
  f.setVisible(true);
 }
 
}

安装的过程是个EXE文件我认为主要是要导入那个lib的包里面的jar文件。

附件里面也有JMF。