Play a local file using URLDataSource

Question

Hi,
I need to play a local video file using URLDataSource, but i dont know why im getting the next error: Error loading the video: NoPlayerException. Cannot find a player.
But, with a file video on internet it works perfectly.
import javax.media.protocol.URLDataSource;
import java.net.URL;
import java.io.*;
public class TestDataSource extends URLDataSource {
     TestDataSource (URL url) throws IOException{
          super(url);
import java.awt.*;
import java.awt.event.*;
import java.util.Vector;
import java.io.*;
import javax.swing.*;
import javax.media.*;
import javax.media.protocol.ContentDescriptor;
import javax.media.protocol.DataSource;
import javax.media.protocol.URLDataSource;
import java.net.URL;
public class VideoPlayer extends JFrame {
     Player player = null;
     private JPanel contentPane;
     TestDataSource mcds = null;
     public static void main(String args[]){     
          String locator = "C:/video.avi";
          (new VideoPlayer(locator)).setVisible(true);
     public VideoPlayer(String locator) {
          super("Example");
          setSize(400,400);
          contentPane = (JPanel) this.getContentPane();
          addWindowListener(new myWindowAdapter());
          File file = new File(locator);
          URL url = null;
          try{
               if(file.exists()){
                    url = file.toURI().toURL();
                    System.out.println("exist");
          }catch(Exception e){
               System.err.println("Error: "+e);
          try{
               mcds = new TestDataSource(url);
               mcds.connect();
          }catch(Exception e){
               System.err.println("Error: "+e);
          try {
               player = Manager.createPlayer(mcds);
               player.addControllerListener(new controllerUpdate());
          }catch(Exception e){
               System.err.println("Error loading the media. ("+e+")");
          if(player != null) player.realize();      
     class controllerUpdate implements ControllerListener {      
          public synchronized void controllerUpdate(ControllerEvent e) {      
               if(e instanceof RealizeCompleteEvent) {
                    Component visualArea = player.getVisualComponent();      
                    Component controlPanel = player.getControlPanelComponent();      
                    if(visualArea!= null)      
                         contentPane.add(visualArea, BorderLayout.CENTER);      
                    if(controlPanel != null)      
                         contentPane.add(controlPanel, BorderLayout.SOUTH);      
                    validate();      
                    player.prefetch();
               if(e instanceof PrefetchCompleteEvent) {
                    player.start();
     class myWindowAdapter extends WindowAdapter {
          public void windowClosing(WindowEvent e){
               if(player != null) player.close();
                    System.exit(0);
}Sorry for my bad english
Thanks in advance

Answer 1

vagosvagos wrote: I need to play a local video file using URLDataSource, but i dont know why im getting the next error: Error loading the video: NoPlayerException. Cannot find a player.
But, with a file video on internet it works perfectly.
The difference is not between file system and internet, it is the format of the file itself that is the problem. When I run your code here, the only (significant) difference in this line..
String locator = "C:/video.avi"; .. and it works perfectly. I used the file you originally linked to on the internet (I had downloaded it to work with the earlier example - since my connection is sooo slow), so it became..
String locator = "dsr_arrow.mpg"; The problem in this case is that apparently that AVI was encoded using a codec that JMF does not support.
Check the [JMF Supported Formats|http://java.sun.com/javase/technologies/desktop/media/jmf/2.1.1/formats.html] page for further details of the codecs or media types that JMF will recognize.
What encoding is your AVI?