使用 Java 创建视频播放器

Creating video player using Java

提问by Anna

I need to create a video player using Java for my project. I have already checked many examples on the Internet. Some of them run, but do not show any screen, I can only hear the sound of the video. Please help me solve this...

我需要为我的项目使用 Java 创建一个视频播放器。我已经在网上查了很多例子。其中一些运行，但不显示任何屏幕，我只能听到视频的声音。请帮我解决这个...

I am using the below import

我正在使用以下导入

import javax.media.*;

EDIT: Below is the code that i use:

编辑：下面是我使用的代码：

import java.awt.*;
 import java.awt.event.*;
 import java.io.*;
 import javax.swing.*;
 import javax.media.*;

 public class MediaPlayerDemo extends JFrame 
 {
     private Player player;
     private File file;

     public MediaPlayerDemo()
     {
         super( "Demonstrating the Java Media Player" );

         JButton openFile = new JButton( "Open file to play" );
         openFile.addActionListener( new ActionListener() 
         {
             public void actionPerformed( ActionEvent e )
             {
                 openFile();
                 createPlayer();
             }
         });
         getContentPane().add( openFile, BorderLayout.NORTH );

         setSize( 300, 300 );
         show();
     }

     private void openFile()
     {
         JFileChooser fileChooser = new JFileChooser();

         fileChooser.setFileSelectionMode( JFileChooser.FILES_ONLY );
         int result = fileChooser.showOpenDialog( this );

         // user clicked Cancel button on dialog
         if ( result == JFileChooser.CANCEL_OPTION )
             file = null;
         else
             file = fileChooser.getSelectedFile();
     }

     private void createPlayer()
     {
         if ( file == null )
             return;

         removePreviousPlayer();

         try 
         {
             // create a new player and add listener
             player = Manager.createPlayer( file.toURL() );
             player.addControllerListener( new EventHandler() );
             player.start(); // start player
         }
         catch ( Exception e )
         {
             JOptionPane.showMessageDialog( this, "Invalid file or location", "Error loading file",
             JOptionPane.ERROR_MESSAGE );
         }
     }

     private void removePreviousPlayer()
     {
         if ( player == null )
             return;

         player.close();

         Component visual = player.getVisualComponent();
         Component control = player.getControlPanelComponent();

         Container c = getContentPane();

         if ( visual != null )
             c.remove( visual );

         if ( control != null )
             c.remove( control );
     }

     public static void main(String args[])
     {
         MediaPlayerDemo app = new MediaPlayerDemo();

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

     // inner class to handler events from media player
     private class EventHandler implements ControllerListener 
     {
         public void controllerUpdate( ControllerEvent e ) 
         {
             if ( e instanceof RealizeCompleteEvent ) 
             {
                 Container c = getContentPane();

                 // load Visual and Control components if they exist
                 Component visualComponent = player.getVisualComponent();

                 if ( visualComponent != null )
                     c.add( visualComponent, BorderLayout.CENTER );

                 Component controlsComponent = player.getControlPanelComponent();

                 if ( controlsComponent != null )
                     c.add( controlsComponent, BorderLayout.SOUTH );

                 c.doLayout();
             }
         }
     }
 }

回答by Petro Semeniuk

I used vlcjand it worked smoothly. It's java binding to vlcj player and the good thing that you don't have to provide any drives since vlcj already includes all of them in binary distribution.

我使用了vlcj并且运行顺利。它是对 vlcj 播放器的 java 绑定，而且您不必提供任何驱动器是一件好事，因为 vlcj 已经将它们全部包含在二进制分发中。

Give it a go, there is example of already working playerbuilt for you!

试一试，这里有为您构建的已经工作的播放器示例！

回答by Stefan Sprenger

Try a JavaFX Mediaplayer:

尝试 JavaFX 媒体播放器：

Usable Codecs:

可用的编解码器：

• Audio: MP3; AIFF containing uncompressed PCM; WAV containing uncompressed PCM; MPEG-4 multimedia container with Advanced Audio Coding (AAC) audio
• Video: FLV containing VP6 video and MP3 audio; MPEG-4 multimedia container with H.264/AVC (Advanced Video Coding) video compression .

• 音频：MP3；AIFF 包含未压缩的 PCM；包含未压缩 PCM 的 WAV；具有高级音频编码 (AAC) 音频的 MPEG-4 多媒体容器
• 视频：包含 VP6 视频和 MP3 音频的 FLV；具有 H.264/AVC（高级视频编码）视频压缩的 MPEG-4 多媒体容器。

Here an example from Oracle:

这是来自 Oracle 的示例：

import javafx.application.Application;
import javafx.collections.ListChangeListener;
import javafx.collections.MapChangeListener;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.media.Media;
import javafx.scene.media.MediaView;
import javafx.scene.media.Track;
import javafx.stage.Stage;

/**
 * A sample media player which loops indefinitely over the same video
 */
public class MediaPlayer extends Application {
private static final String MEDIA_URL = "http://someserver/somedir/somefile.mp4";

private static String arg1;

    @Override public void start(Stage stage) {
        stage.setTitle("Media Player");

// Create media player
        Media media = new Media((arg1 != null) ? arg1 : MEDIA_URL);
        javafx.scene.media.MediaPlayer mediaPlayer = new javafx.scene.media.MediaPlayer(media);
        mediaPlayer.setAutoPlay(true);
        mediaPlayer.setCycleCount(javafx.scene.media.MediaPlayer.INDEFINITE);

// Print track and metadata information
        media.getTracks().addListener(new ListChangeListener<Track>() {
public void onChanged(Change<? extends Track> change) {
                System.out.println("Track> "+change.getList());
            }
        });
        media.getMetadata().addListener(new MapChangeListener<String,Object>() {
public void onChanged(MapChangeListener.Change<? extends String, ? extends Object> change) {
                System.out.println("Metadata> "+change.getKey()+" -> "+change.getValueAdded());
            }
        });

// Add media display node to the scene graph
        MediaView mediaView = new MediaView(mediaPlayer);
        Group root = new Group();
        Scene scene = new Scene(root,800,600);
        root.getChildren().add(mediaView);
        stage.setScene(scene);
        stage.show();
    }

public static void main(String[] args) {
if (args.length > 0) {
            arg1 = args[0];
        }
        Application.launch(args);
    }
}

https://blogs.oracle.com/javafx/entry/mpeg_4_multimedia_support_in

https://blogs.oracle.com/javafx/entry/mpeg_4_multimedia_support_in

回答by G.Srinivas Kishan

Java Media Framework can be used to create multimedia applications like video and audio players.

Java Media Framework 可用于创建多媒体应用程序，如视频和音频播放器。

回答by techspl

Here is the working code.

这是工作代码。

package New;

import java.net.URL;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.HPos;
import javafx.geometry.Insets;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.effect.DropShadow;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.scene.media.MediaPlayer.Status;
import javafx.scene.media.MediaView;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;

public class FxMediaExample2 extends Application {
    public static void main(String[] args) {
        Application.launch(args);
    }

    @Override
    public void start(Stage stage) {
        // Locate the media content in the CLASSPATH
        URL mediaUrl = getClass().getResource("Test.mp4");
        String mediaStringUrl = mediaUrl.toExternalForm();

        // Create a Media
        Media media = new Media(mediaStringUrl);

        // Create a Media Player
        final MediaPlayer player = new MediaPlayer(media);
        // Automatically begin the playback
        player.setAutoPlay(true);

        // Create a 400X300 MediaView
        MediaView mediaView = new MediaView(player);

        mediaView.setFitWidth(400);
        mediaView.setFitHeight(300);
        mediaView.setSmooth(true);
        mediaView.setLayoutX(200);
        mediaView.setLayoutY(200);
        // Create the DropShadow effect
        DropShadow dropshadow = new DropShadow();
        dropshadow.setOffsetY(5.0);
        dropshadow.setOffsetX(5.0);
        dropshadow.setColor(Color.RED);

        mediaView.setEffect(dropshadow);

        Rectangle rect4 = new Rectangle(35, 55, 95, 25);
        rect4.setFill(Color.RED);
        rect4.setStroke(Color.BLACK);
        rect4.setStrokeWidth(1);

        // Create the HBox
        // HBox controlBox = new HBox(5, null, null);

        // Create the VBox
        VBox root = new VBox(1, mediaView);

        GridPane gridpane = new GridPane();
        gridpane.setPadding(new Insets(95));
        gridpane.setHgap(1);
        gridpane.setVgap(10);

        GridPane.setHalignment(rect4, HPos.CENTER);

        Group grp = new Group();
        gridpane.add(root, 1, 1);

        grp.getChildren().add(gridpane);

        // Create the Scene
        Scene scene = new Scene(grp);

        // Add the scene to the Stage
        stage.setScene(scene);
        // Set the title of the Stage
        stage.setTitle("A simple Media Example");
        // Display the Stage
        stage.show();
    }
}