使用JMF实现java写自己的视频播放器

Posted 2022-04-20 Bird

    JMF这个多媒体开发框架太牛了，简单的几句代码就能实现一个视频播放器的开发，厉害，就是支持的格式少了一些，没关系，这个视频播放器可以播放mpg，avi,fvl等等，想播放其他的请开发自己的插件，下面将代码贴上去

     

package com.bird.jmf;

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Frame;
import java.awt.Panel;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;

import javax.media.CannotRealizeException;
import javax.media.ControllerEvent;
import javax.media.ControllerListener;
import javax.media.EndOfMediaEvent;
import javax.media.Manager;
import javax.media.MediaLocator;
import javax.media.NoPlayerException;
import javax.media.Player;
import javax.media.PrefetchCompleteEvent;
import javax.media.RealizeCompleteEvent;
import javax.media.Time;

@SuppressWarnings( "restriction", "unused" )
public class JMFSample implements ControllerListener 
    public static void main(String[] args) 
        JMFSample sp = new JMFSample();
        sp.play();
    
   
    private Player mediaPlayer;
    private Frame f;
    private Player player;
    private Panel panel;
    private Component visual;
    private Component control = null;
   
    public void play()
        f = new Frame("JMF Sample1");
        f.addWindowListener(new WindowAdapter() 
            public void windowClosing(WindowEvent we) 
                if(player != null) 
                    player.close();
                
                System.exit(0);
            
        );
        f.setSize(500,400);

        f.setVisible(true);
        URL url = null;
        try 
            //准备一个要播放的视频文件的URL
            url = new URL("file:/d:/2.mpg");
         catch (MalformedURLException e) 
            e.printStackTrace();
               
        try 
            //通过调用Manager的createPlayer方法来创建一个Player的对象
            //这个对象是媒体播放的核心控制对象
            player = Manager.createPlayer(url);
         catch (NoPlayerException e1) 
            e1.printStackTrace();
         catch (IOException e1) 
            e1.printStackTrace();
         

        //对player对象注册监听器，能噶偶在相关事件发生的时候执行相关的动作
        player.addControllerListener(this);
       
        //让player对象进行相关的资源分配
        player.realize();
    
   
    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
            player.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 = player.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 = player.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
            player.start();
            mediaPlayer.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
            player.setMediaTime(new Time(0));
            player.start();
        
    

效果图如下