使用JMF可以同时提取视频流和音频流，然后通过数据源的混合，可以达到视频音频同时收集和播放的功能。其中主
要是通过数据源的混合，也就是视频流和音频流的数据源的混合。下面我们来写一个例子。通过开启摄像头的麦克风实
现同时收集视频和音频。
package com.bird.test;import java.awt.BorderLayout;import java.awt.Component;import java.awt.Dimension;import java.awt.Frame;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import javax.media.ControllerEvent;import javax.media.ControllerListener;import javax.media.EndOfMediaEvent;import javax.media.Manager;import javax.media.MediaLocator;import javax.media.Player;import javax.media.PrefetchCompleteEvent;import javax.media.RealizeCompleteEvent;import javax.media.Time;import javax.media.protocol.DataSource;public class MyVideoPlayer implements ControllerListener{ public static void main(String[] args) { MyVideoPlayer sp = new MyVideoPlayer(); sp.play(); } private Frame f; // private Player videoplayer; // private Player audioplayer; private Player dualPlayer; private Component visual; private Component control = null; private MediaLocator mediaLocator; private MediaLocator audioLocator; public void play() { f = new Frame("MyPlayer"); f.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent we) { if (dualPlayer != null) { dualPlayer.close(); } System.exit(0); } }); f.setSize(500, 400); f.setVisible(true); try { mediaLocator = new MediaLocator("vfw://0");// 此类描述媒体目录的地址???? audioLocator = new MediaLocator("javasound://44100"); } catch (Exception e) { System.out.println(e.toString()); } try { DataSource[] dataSources = new DataSource[2]; dataSources[0] = Manager.createDataSource(mediaLocator); dataSources[1] = Manager.createDataSource(audioLocator); DataSource ds = Manager.createMergingDataSource(dataSources); dualPlayer = Manager.createPlayer(ds); } catch (Exception e1) { e1.printStackTrace(); } dualPlayer.realize(); dualPlayer.addControllerListener(this); } private int videoWidth = 0; private int videoHeight = 0; private int controlHeight = 30; private int insetWidth = 10; private int insetHeight = 30; // 监听player的相关事件 public void controllerUpdate(ControllerEvent ce) { if (ce instanceof RealizeCompleteEvent) { // player实例化完成后进行player播放前预处理 dualPlayer.prefetch(); } else if (ce instanceof PrefetchCompleteEvent) { if (visual != null) return; // 取得player中的播放视频的组件，并得到视频窗口的大小 // 然后把视频窗口的组件添加到Frame窗口中， if ((visual = dualPlayer.getVisualComponent()) != null) { Dimension size = visual.getPreferredSize(); videoWidth = size.width; videoHeight = size.height; f.add(visual); } else { videoWidth = 320; } // 取得player中的视频播放控制条组件，并把该组件添加到Frame窗口中 if ((control = dualPlayer.getControlPanelComponent()) != null) { controlHeight = control.getPreferredSize().height; f.add(control, BorderLayout.SOUTH); } // 设定Frame窗口的大小，使得满足视频文件的默认大小 f.setSize(videoWidth + insetWidth, videoHeight + controlHeight + insetHeight); f.validate(); // 启动视频播放组件开始播放 dualPlayer.start(); } else if (ce instanceof EndOfMediaEvent) { // 当播放视频完成后，把时间进度条恢复到开始，并再次重新开始播放 dualPlayer.setMediaTime(new Time(0)); // videoplayer.start(); // audioplayer.start(); dualPlayer.start(); } }}其实代码中很多的GUI编程和 监听器，真正的JMF的东西并不是很多，主要是注意Player的状态问题。由realizing变成
relized;
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