vlcj - 字幕

让我们进一步增强应用程序，我们将更新 vlcj - Audio Player 章节，使其支持 Marquee。我们可以在视频上添加文本作为覆盖层。

创建和构建 Marquee (字幕)

Marquee marquee = Marquee.marquee()
   .text("TutorialsPoint")
   .size(40)
   .colour(Color.WHITE)    		    
   .position(MarqueePosition.BOTTOM_RIGHT)
   .opacity(0.5f)
   .enable();

设置 Marquee

现在使用 marquee 方法，我们可以使用以下语法轻松地在我们的应用程序中的视频上设置一个 marquee −

mediaPlayerComponent.mediaPlayer().marquee().set(marquee);

示例

打开在 Eclipse 中的环境设置一章中创建的项目 mediaPlayer。

使用以下代码更新 App.java −

App.java

package com.tutorialspoint.media;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseWheelEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.border.Border;
import uk.co.caprica.vlcj.player.base.Marquee;
import uk.co.caprica.vlcj.player.base.MarqueePosition;
import uk.co.caprica.vlcj.player.base.MediaPlayer;
import uk.co.caprica.vlcj.player.base.MediaPlayerEventAdapter;
import uk.co.caprica.vlcj.player.component.AudioPlayerComponent;
import uk.co.caprica.vlcj.player.component.EmbeddedMediaPlayerComponent;

public class App extends JFrame {
   private static final long serialVersionUID = 1L;
   private static final String TITLE = "My First Media Player";
   private static final String VIDEO_PATH = "D:\Downloads\sunset-beach.mp4";
   private static final String AUDIO_PATH = "D:\Downloads\time-to-feel-good.mp3";
   private final EmbeddedMediaPlayerComponent mediaPlayerComponent;
   private final AudioPlayerComponent audioPlayerComponent;
   private final Marquee marquee;
   private JButton playButton;
   private JButton pauseButton;
   private JButton rewindButton;
   private JButton skipButton;
   private JButton playAudioButton;
   private JButton pauseAudioButton;

   public App(String title) {
      super(title);
      mediaPlayerComponent = new EmbeddedMediaPlayerComponent() {
         @Override
         public void mouseClicked(MouseEvent e) {
            super.mouseClicked(e);
            System.out.println("Mouse Clicked. (" + e.getX() + "," + e.getY() + ")");
         }
         @Override
         public void mouseWheelMoved(MouseWheelEvent e) {
            super.mouseWheelMoved(e);
            System.out.println("Mouse wheel moved. " + e.getScrollAmount());
         } 
         @Override
         public void keyPressed(KeyEvent e) {
            super.keyPressed(e);
            System.out.println("Key pressed. " + e.getKeyCode());
         }
         @Override
         public void playing(MediaPlayer mediaPlayer) {
            super.playing(mediaPlayer);
            System.out.println("Media Playback started.");
         }
         @Override
         public void finished(MediaPlayer mediaPlayer) {
            super.playing(mediaPlayer);
            System.out.println("Media Playback finished.");
         }
         @Override
         public void error(MediaPlayer mediaPlayer) {
            SwingUtilities.invokeLater(new Runnable() {        		
               public void run() {
                  System.out.println("Failed to load Media.");
               }        	       
            });
         }
      };		
      audioPlayerComponent = new AudioPlayerComponent();
      audioPlayerComponent.mediaPlayer().events().addMediaPlayerEventListener(new MediaPlayerEventAdapter() {
         @Override
         public void finished(MediaPlayer mediaPlayer) {
            System.out.println("Audio Playback Finished.");
         }
         @Override
         public void error(MediaPlayer mediaPlayer) {
            System.out.println("Failed to load Audio.");
         }
      });
	   marquee = Marquee.marquee()
         .text("TutorialsPoint")
         .size(40)
         .colour(Color.WHITE)    		    
         .position(MarqueePosition.BOTTOM_RIGHT)
         .opacity(0.5f)
         .enable();

      mediaPlayerComponent.mediaPlayer().marquee().set(marquee);
   }
   public void initialize() {
      this.setBounds(100, 100, 600, 400);
      this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      this.addWindowListener(new WindowAdapter() {
         @Override
         public void windowClosing(WindowEvent e) {
            mediaPlayerComponent.release();
            System.exit(0);
         }
      });    	
      JPanel contentPane = new JPanel();
      contentPane.setLayout(new BorderLayout());   	 
      contentPane.add(mediaPlayerComponent, BorderLayout.CENTER);

      //Create a video border
      Border videoBorder = BorderFactory.createTitledBorder("Video Controls");

      //Create an audio border
      Border audioBorder = BorderFactory.createTitledBorder("Audio Controls");

      JPanel videoControlsPane = new JPanel(); 
      videoControlsPane.setBorder(videoBorder);
      playButton = new JButton("Play");
      videoControlsPane.add(playButton);    
      pauseButton = new JButton("Pause");
      videoControlsPane.add(pauseButton);
      rewindButton = new JButton("Rewind");
      videoControlsPane.add(rewindButton);
      skipButton = new JButton("Skip");
      videoControlsPane.add(skipButton);
      JPanel audioControlsPane = new JPanel(); 
      audioControlsPane.setBorder(audioBorder);
      playAudioButton = new JButton("Play");
      audioControlsPane.add(playAudioButton);  
      pauseAudioButton = new JButton("Pause");
      audioControlsPane.add(pauseAudioButton);
      JPanel controlsPane = new JPanel();
      controlsPane.add(videoControlsPane);
      controlsPane.add(audioControlsPane);
      contentPane.add(controlsPane, BorderLayout.SOUTH);

      playButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            mediaPlayerComponent.mediaPlayer().controls().play();
         }
      });  
      pauseButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            mediaPlayerComponent.mediaPlayer().controls().pause();
         }
      });
      rewindButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            mediaPlayerComponent.mediaPlayer().controls().skipTime(-14000);
         }
      });
      skipButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            mediaPlayerComponent.mediaPlayer().controls().skipTime(4000);
         }
      });
      playAudioButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            audioPlayerComponent.mediaPlayer().controls().play();
         }
      });
      pauseAudioButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            audioPlayerComponent.mediaPlayer().controls().pause();
         }
      });

      this.setContentPane(contentPane);
      this.setVisible(true);
   }
   public void loadVideo(String path) {
      mediaPlayerComponent.mediaPlayer().media().startPaused(path);   	
   }
   public void loadAudio(String path) {
      audioPlayerComponent.mediaPlayer().media().startPaused(path);   	
   }
   public static void main( String[] args ){
      try {            
         UIManager.setLookAndFeel(
         UIManager.getSystemLookAndFeelClassName());
      } 
      catch (Exception e) {
         System.out.println(e);
      }
      App application = new App(TITLE);
      application.initialize(); 
      application.setVisible(true);  
      application.loadVideo(VIDEO_PATH);
      application.loadAudio(AUDIO_PATH);
   }
}

通过右键单击文件并选择以 Java 应用程序运行来运行应用程序。成功启动后，如果一切正常，则应显示以下结果 −