Reproductor de video con VLCJ

import com.sun.jna.Native;
import com.sun.jna.NativeLibrary;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.io.File;
import javax.swing.AbstractButton;
import javax.swing.JFileChooser;
import javax.swing.JOptionPane;
import javax.swing.JSlider;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.filechooser.FileNameExtensionFilter;
import uk.co.caprica.vlcj.binding.LibVlc;
import uk.co.caprica.vlcj.component.EmbeddedMediaPlayerComponent;
import uk.co.caprica.vlcj.player.MediaPlayer;
import uk.co.caprica.vlcj.player.MediaPlayerEventAdapter;
import uk.co.caprica.vlcj.runtime.RuntimeUtil;

    private EmbeddedMediaPlayerComponent player;
    private File file;
    static{
        NativeLibrary.addSearchPath(RuntimeUtil.getLibVlcLibraryName(), "C:\\Program Files\\VideoLAN\\VLC\\");
        Native.loadLibrary(RuntimeUtil.getLibVlcLibraryName(), LibVlc.class);
    }
    //bandera para controlar la reproduccion de video y el cambio en el avance de video
    private boolean band = true;

public Reproductor() {
    initComponents();

    //codigo aqui 

}

setTitle("VLCJ Player");//nombre de reproductor
setLocationRelativeTo(null);//centrar en pantalla
player = new EmbeddedMediaPlayerComponent();
//se añade reproductor 
jPanel2.add(player);
player.setSize(jPanel2.getSize());
player.setVisible(true);
//slider control de volumen
sldVolumen.setMinimum(0);
sldVolumen.setMaximum(100);
//slider control progreso
sldProgress.setMinimum(0);
sldProgress.setMaximum(100);
sldProgress.setValue(0);
sldProgress.setEnabled(false);

        //Control abrir archivo 
        btnOpenFile.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                JFileChooser fileChooser = new JFileChooser();
                FileNameExtensionFilter filter = new FileNameExtensionFilter("Videos", "mp4","flv","webm","3gp","dat");
                fileChooser.addChoosableFileFilter(filter);
                //fileChooser.setCurrentDirectory(new java.io.File("C:\\videos\\tmp\\"));
                if ( fileChooser.showOpenDialog(null) == JFileChooser.APPROVE_OPTION ){            
                    file = fileChooser.getSelectedFile();                                     
                    btnPlay.doClick();
                }
            }            
        });

        //Control captura de ventana
        btnSnapshot.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                if(file!=null){
                    String absolutePath = file.getAbsolutePath();        
                    String newPath = absolutePath .substring(0, absolutePath .length()-4) + "_" + System.currentTimeMillis() + ".png";                
                    if( player.getMediaPlayer().saveSnapshot(new File(newPath)) )               
                       JOptionPane.showMessageDialog(null, "Snapshot: " + newPath );  
                }
            }            
        });

        //Control de reproduccion
        btnPlay.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e)
            {
                if (file!=null){                    
                    player.getMediaPlayer().playMedia(file.getAbsolutePath());    
                    sldVolumen.setValue(  player.getMediaPlayer().getVolume() );
                    sldProgress.setEnabled(true);
                    setTitle( file.getName() + " - VLCJ Player");    
                }
            }
        }); 

        //Control de pausa
        btnPause.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e)
            {
               player.getMediaPlayer().setPause( player.getMediaPlayer().isPlaying()?true:false );                                   
            }
        }); 

        //Control detener reproduccion
        btnStop.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e)
            {
              player.getMediaPlayer().stop();   
              sldProgress.setValue(0);
              sldProgress.setEnabled(false);
              setTitle("VLCJ Player");
            }
        }); 

       //Control silenciar 
       btnMute.addActionListener(new ActionListener() {            
            @Override
            public void actionPerformed(ActionEvent actionEvent) {
                AbstractButton abstractButton = (AbstractButton) actionEvent.getSource();                
                player.getMediaPlayer().mute( abstractButton.getModel().isSelected() );                
            }
        });

        //Control slider cambiar volumen
        sldVolumen.addChangeListener(new ChangeListener(){

            @Override
            public void stateChanged(ChangeEvent e) {
                Object source = e.getSource();                                
                player.getMediaPlayer().setVolume( ((JSlider) source).getValue() );
            }            
        });

        //Listener de reproductor para mostrar el progreso en la reproduccion del video 
        player.getMediaPlayer().addMediaPlayerEventListener(new MediaPlayerEventAdapter() {

            @Override
            public void positionChanged(MediaPlayer mp, float pos)
            {
                if(band){
                    int value = Math.min(100, Math.round(pos * 100.0f));            
                    sldProgress.setValue(value);                                                    
                }
            }

            @Override
            public void finished(MediaPlayer mediaPlayer){

            }

        });

        //Listener para el slider progress
        sldProgress.addMouseListener(new MouseListener(){

            @Override
            public void mouseClicked(MouseEvent e) {}

            @Override
            public void mousePressed(MouseEvent e) {
                band= false;
            }

            @Override
            public void mouseReleased(MouseEvent e) {
                band = true;
            }

            @Override
            public void mouseEntered(MouseEvent e) {}

            @Override
            public void mouseExited(MouseEvent e) {}

        });

        //Control para cambiar a posicion de reproduccion
        sldProgress.addChangeListener(new ChangeListener(){

            @Override
            public synchronized void stateChanged(ChangeEvent e) {
                if( !band ){
                    Object source = e.getSource();                                
                    float np = ((JSlider) source).getValue() / 100f;                    
                    player.getMediaPlayer().setPosition(np);    
                }

            }            
        });