Video doesn't play on loop or repeat (vlcj-java)

Question

I am using vlcj on my java program. I need the video to play repeatedly. I've used setRepeat(true); but it doesn't work for me. Is this any other to loop the video? Or am I doing it wrong? Please help me. Thanks a lot.

 public QueueMonitor() {
                    
        initComponents();
         
        //VIDEO
        chargerLibrairie();

        Canvas c = new Canvas();
        panel.add(c);
        MediaPlayerFactory mediaPlayerFactory = new MediaPlayerFactory();
        //Create a media player instance
        EmbeddedMediaPlayer mediaPlayer = mediaPlayerFactory.newEmbeddedMediaPlayer();
        mediaPlayer.setVideoSurface(mediaPlayerFactory.newVideoSurface(c));
        
        mediaPlayer.playMedia("Ospital1.mp4");
        mediaPlayer.setRepeat(true);
        mediaPlayer.setPlaySubItems(true);

       
    }


    public static void chargerLibrairie(){
        NativeLibrary.addSearchPath(
        RuntimeUtil.getLibVlcLibraryName(), "C:/Program Files/VideoLAN/VLC");
        Native.loadLibrary(RuntimeUtil.getLibVlcLibraryName(), LibVlc.class);
        LibXUtil.initialise();
    }

Also, how can I put some functions like pause, play, lower volume while the program is running? Like how a normal video player is able to do.

Answer 1

public class Video extends javax.swing.JPanel
{

  private EmbeddedMediaPlayerComponent video;
  private EmbeddedMediaPlayer mediaPlayer;
 
 public Video()
  {
    initComponents();
    initVideo();
  }

  private void initVideo()
  {
    video = new EmbeddedMediaPlayerComponent()
    {
      @Override
      public void finished(MediaPlayer mediaPlayer)
      {
        super.finished(mediaPlayer);
        System.out.println("FINISHED");
        new Thread(() -> {
          System.gc();
          mediaPlayer.controls().setTime(0);
          mediaPlayer.controls().play();
        }).start();
      }
    };
    mediaPlayer = video.mediaPlayer();
    mediaPlayer.input().enableKeyInputHandling(false);
    mediaPlayer.input().enableMouseInputHandling(false);
    add(video, BorderLayout.CENTER);

  }
  public void start(String path)
  {
    mediaPlayer.media().prepare(path);
    mediaPlayer.controls().play();
  }
  public void stop()
  {
    mediaPlayer.controls().stop();
    mediaPlayer.release();
    video.release();
  }
  @SuppressWarnings("unchecked")
  private void initComponents()
  {
    setLayout(new java.awt.BorderLayout());
  }
 }

Answer 2

Here are some minimal examples of how to get repeat play working with vlcj.

For current versions of vlcj, 4.x and later:

// vlcj 4.x+
public class RepeatPlayer {

    public static void main(String[] args) throws Exception {
        String mrl = "some-cool-video.mp3";

        EmbeddedMediaPlayerComponent mediaPlayerComponent = new EmbeddedMediaPlayerComponent();

        JFrame f = new JFrame("Repeat Player");
        f.setSize(800, 600);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                mediaPlayerComponent.release();
            }
        });
        f.setContentPane(mediaPlayerComponent);
        f.setVisible(true);

        mediaPlayerComponent.mediaPlayer().controls().setRepeat(true);

        mediaPlayerComponent.mediaPlayer().media().play(mrl);

        Thread.currentThread().join();
    }
}

Since it looks like you're using an ancient version of vlcj, this is how it was done previously:

// vlcj 3.12.1
public class RepeatPlayer {

    public static void main(String[] args) throws Exception {
        String mrl = "some-cool-video.mp3";

        final EmbeddedMediaPlayerComponent mediaPlayerComponent = new EmbeddedMediaPlayerComponent();

        JFrame f = new JFrame("Repeat Player");
        f.setSize(800, 600);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                mediaPlayerComponent.release();
            }
        });
        f.setContentPane(mediaPlayerComponent);
        f.setVisible(true);

        mediaPlayerComponent.getMediaPlayer().setRepeat(true);

        mediaPlayerComponent.getMediaPlayer().playMedia(mrl);

        Thread.currentThread().join();
    }
}

---

The code in the original question was therefore broadly correct at least with regards to the repeat-play functionality. The most likely problem with the original code is that the media player was garbage collected due to a failure to hold the object references.