vlcj - 覆盖
让我们进一步增强应用程序，我们将在其中更新vlcj - 音频均衡器章节，使其支持覆盖。
创建覆盖
我们可以将覆盖创建为可显示在视频上的摇摆窗口。
class Overlay extends Window {
public Overlay(Window owner) {
super(owner, WindowUtils.getAlphaCompatibleGraphicsConfiguration());
setBackground(new Color(0, 0, 0, 0));
}
@Override
public void paint(Graphics g) {
super.paint(g);
}
}
创建并设置覆盖层
以下代码为媒体设置覆盖层。
Overlay overlay = new Overlay(this); mediaPlayerComponent.mediaPlayer().overlay().set(overlay);
按需启用/禁用覆盖层。
mediaPlayerComponent.mediaPlayer().overlay().enable(overlayEnabled);
示例
在 Eclipse 中打开在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.Dimension;
import java.awt.Font;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.Window;
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 java.util.List;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JToggleButton;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.border.Border;
import com.sun.jna.platform.WindowUtils;
import uk.co.caprica.vlcj.media.Media;
import uk.co.caprica.vlcj.media.MediaEventAdapter;
import uk.co.caprica.vlcj.media.MediaParsedStatus;
import uk.co.caprica.vlcj.media.TrackInfo;
import uk.co.caprica.vlcj.player.base.ChapterDescription;
import uk.co.caprica.vlcj.player.base.Equalizer;
import uk.co.caprica.vlcj.player.base.Logo;
import uk.co.caprica.vlcj.player.base.LogoPosition;
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.base.TitleDescription;
import uk.co.caprica.vlcj.player.base.TrackDescription;
import uk.co.caprica.vlcj.player.component.AudioPlayerComponent;
import uk.co.caprica.vlcj.player.component.EmbeddedMediaPlayerComponent;
import uk.co.caprica.vlcj.player.embedded.fullscreen.adaptive.AdaptiveFullScreenStrategy;
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 static final String LOGO_PATH = "D:\Downloads\logo.png";
private final EmbeddedMediaPlayerComponent mediaPlayerComponent;
private final AudioPlayerComponent audioPlayerComponent;
private final Marquee marquee;
private final Logo logo;
private final Equalizer equalizer;
private final Overlay overlay;
private boolean overlayEnabled = false;
private JButton playButton;
private JButton pauseButton;
private JButton rewindButton;
private JButton skipButton;
private JButton playAudioButton;
private JButton pauseAudioButton;
private JToggleButton toggleButton;
private JButton equalizerButton;
private JToggleButton overlayButton;
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);
logo = Logo.logo()
.file(LOGO_PATH)
.position(LogoPosition.TOP_LEFT)
.opacity(0.3f)
.enable();
mediaPlayerComponent.mediaPlayer().logo().set(logo);
mediaPlayerComponent.mediaPlayer().events().addMediaEventListener(new MediaEventAdapter() {
@Override
public void mediaParsedChanged(Media media,
MediaParsedStatus newStatus) {
if(newStatus == MediaParsedStatus.DONE) {
MediaPlayer mediaPlayer = mediaPlayerComponent.mediaPlayer();
List<TrackDescription> videoTracks = mediaPlayer.video().trackDescriptions();
System.out.println(videoTracks.get(1));
List<TitleDescription> titles = mediaPlayer.titles().titleDescriptions();
if(!titles.isEmpty()) {
System.out.println(titles.get(0));
}
List<ChapterDescription> chapters = mediaPlayer.chapters().descriptions();
if(!chapters.isEmpty()) {
System.out.println(chapters.get(0));
}
List<? extends TrackInfo> trackInfo = mediaPlayer.media().info().tracks();
if(!trackInfo.isEmpty()) {
System.out.println(trackInfo.get(0));
}
}
}
});
mediaPlayerComponent.mediaPlayer().fullScreen().strategy(new AdaptiveFullScreenStrategy(this));
List<String> presetNames = mediaPlayerComponent.mediaPlayerFactory().equalizer().presets();
System.out.println(presetNames);
equalizer = mediaPlayerComponent.mediaPlayerFactory().equalizer().newEqualizer("Dance");
overlay = new Overlay(this);
mediaPlayerComponent.mediaPlayer().overlay().set(overlay);
}
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");
//Create others border
Border othersBorder = BorderFactory.createTitledBorder("Others");
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 othersPane = new JPanel();
othersPane.setBorder(othersBorder);
toggleButton = new JToggleButton("Toggle Full Screen");
equalizerButton = new JButton("Equalizer");
overlayButton = new JToggleButton("Toggle Overlay");
othersPane.add(toggleButton);
othersPane.add(equalizerButton);
othersPane.add(overlayButton);
JPanel controlsPane = new JPanel();
controlsPane.add(videoControlsPane);
controlsPane.add(audioControlsPane);
controlsPane.add(othersPane);
controlsPane.setPreferredSize(new Dimension(400, 120));
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();
}
});
toggleButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
mediaPlayerComponent.mediaPlayer().fullScreen().toggle();
}
});
equalizerButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
mediaPlayerComponent.mediaPlayer().audio().setEqualizer(equalizer);
System.out.println("Using equalizer: " + equalizer);
}
});
overlayButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
overlayEnabled = !overlayEnabled;
mediaPlayerComponent.mediaPlayer().overlay().enable(overlayEnabled);
}
});
this.setContentPane(contentPane);
this.setVisible(true);
}
public void loadVideo(String path) {
mediaPlayerComponent.mediaPlayer().media().startPaused(path);
mediaPlayerComponent.mediaPlayer().media().parsing().parse();
}
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);
}
}
class Overlay extends Window {
public Overlay(Window owner) {
super(owner, WindowUtils.getAlphaCompatibleGraphicsConfiguration());
setBackground(new Color(0, 0, 0, 0));
}
@Override
public void paint(Graphics g) {
super.paint(g);
Graphics2D g2 = (Graphics2D)g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
GradientPaint gp = new GradientPaint(
180.0f, 280.0f,
new Color(255, 255, 255, 255),
250.0f,
380.0f,
new Color(255, 255, 0, 0)
);
g2.setPaint(gp);
g2.setFont(new Font("Serif", Font.PLAIN,32));
g2.drawString("TutorialsPoint",200, 200);
}
}
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 −
现在单击切换覆盖按钮并查看视频上的覆盖文本，如下所示。
