Quicktime for java- audio/video capture problem

[Paramjeet Rana]

Hello,
I am using windows xpsp3, latest version of java and quictime. I have a camera attached in my laptob(Lenovo) and using a mic for sound capture.

I Am trying to cature audio to the disk. There goes nothing wrong while compiling. I m using a button to stop grabbing audio and then saving that audio to the disk. but as soon as i click on the button the following exception appears and no audio is captured to the disk:--

exception occurred:-

quicktime.std.StdQTException[QTJava:7.4.0g],-2014=invalidDuration,QT.vers:7408000

The program is:-

    
import quicktime.*;
import quicktime.io.*;
import quicktime.std.*;
import quicktime.std.sg.*;
import quicktime.std.movies.*;
 
import quicktime.qd.*;
import quicktime.sound.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
 
import qtSessionCheck.*;
 

public class CaptureAudioToDisk implements ActionListener
{
 
    SequenceGrabber grabber;
    SGSoundChannel soundChannel;
   
    JFrame frmMain;
 
    JButton cmdStop;
 
    QTFile grabFile;
 
    public CaptureAudioToDisk() throws QTException
    {
        QTSessionCheck.check();
        setUpAudioGrab();
    }
 
    protected void setUpAudioGrab() throws QTException
    {
 
        frmMain=new JFrame("Capture Audio");
        frmMain.setSize(100,100);
        cmdStop=new JButton("Stop");
        cmdStop.addActionListener(this);
 
        frmMain.add(cmdStop);
        frmMain.setVisible(true);
        frmMain.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
        grabber=new SequenceGrabber();
        soundChannel=new SGSoundChannel(grabber);
        //prepare and start previewing
 
        grabber.prepare(true,true);
 
        soundChannel.setUsage(StdQTConstants.seqGrabPreview | StdQTConstants.seqGrabRecord | StdQTConstants.seqGrabPlayDuringRecord);
        soundChannel.setVolume(1.0f);
       
        grabber.startPreview();
       
        File audiograb=new File("d:/","audiograb.mov");
        grabFile=new QTFile(audiograb);
       
        grabber.setDataOutput(grabFile, StdQTConstants.seqGrabToDisk);
 

        grabber.startRecord();
        System.out.println("capture started....!");
 
    }
 
    public void actionPerformed(ActionEvent e)
    {
        try
        {
            if(e.getSource()==cmdStop)
                grabber.stop();
        }
        catch(Exception ex)
        {
       
            System.out.println("exception occurred:-"+ex);
        }
    }
 
    public static void main(String args[]) throws QTException
    {   
 
        new CaptureAudioToDisk();
    }
}       
 

When i am trying to capture video.. again some exceptions are shown.. which i am not able to understand.. the code compiles alright but not able to run the code..
the program is:-

    
import quicktime.*;
import quicktime.io.*;
import quicktime.std.*;
import quicktime.std.sg.*;
import quicktime.std.movies.*;
import quicktime.std.image.*;
import quicktime.qd.*;
import quicktime.sound.*;
 
import java.awt.*;
import java.awt.event.*;
import javax.swing.Timer;
 
import qtSessionCheck.*;
 

public class VideoCaptureToDisk extends Frame
  implements ActionListener {
  SequenceGrabber grabber;
  SGVideoChannel videoChannel;
  QDGraphics gw;
  QDRect grabBounds;
  boolean grabbing;
  Button stopButton;
  QTFile grabFile;
  public VideoCaptureToDisk( ) throws QTException {
      super ("Video Capture");
      QTSessionCheck.check( );
      setLayout (new GridLayout (2, 1));
      add (new Label ("Capturing video..."));
      stopButton = new Button ("Stop");
      stopButton.addActionListener (this);
      add (stopButton);
 

 

 
      setUpVideoGrab( );
  }
  public void actionPerformed (ActionEvent e) {
      if (e.getSource( ) == stopButton) {
          System.out.println ("Stop grabbing");
          try {
              grabbing = false;
              if (grabber != null) {
                  grabber.stop( );
              }
          } catch (Exception ex) {
              ex.printStackTrace( );
          } finally {
              System.exit (0);
          }
      }
  }
 
  protected void setUpVideoGrab( ) throws QTException {
      grabber = new SequenceGrabber( );
      System.out.println ("got grabber");
      // force an offscreen gworld
      grabBounds = new QDRect(320, 240);
      gw = new QDGraphics(grabBounds);
      grabber.setGWorld(gw, null);
      // get videoChannel and set its bounds
      videoChannel = new SGVideoChannel(grabber);
      System.out.println("Got SGVideoChannel");
      videoChannel.setBounds (grabBounds);
      // get settings
      // yikes! this crashes java 1.4.2 on mac os x!
 
      videoChannel.settingsDialog( );
 
      // prepare and start previewing
      // note - second prepare arg should seemingly be false,
      // but if it is, you get erroneous dskFulErr's
      videoChannel.setUsage (StdQTConstants.seqGrabRecord);
 
      grabber.prepare(false, true);
      grabber.startPreview( );
      // create output file
      grabFile = new QTFile (new java.io.File ("videograb.mov"));
      grabber.setDataOutput(grabFile,
                            StdQTConstants.seqGrabToDisk
                            //seqGrabDontAddMovieResource);
                            );
      grabber.startRecord( );
      grabbing = true;
      // set up thread to idle
      ActionListener timerCallback =
          new ActionListener( ) {
              public void actionPerformed(ActionEvent e) {
                  if (grabbing) {
                      try {
                          grabber.idle( );
                          grabber.update(null);
                      } catch (QTException qte) {
                          qte.printStackTrace( );
                      }
                  }
              }
          };
      Timer timer = new Timer (50, timerCallback);
      timer.start( );
  }
 
  public static void main (String[] args) {
      try {
          Frame f = new VideoCaptureToDisk();
          f.pack();
          f.setVisible(true);
      } catch (QTException qte) {
          qte.printStackTrace( );
      }
  }
}
 

Exceptions shown are:-
quicktime.std.StdQTException[QTJava:7.4.0g],-9405=couldntGetRequiredComponent,QT.vers:7408000
           at quicktime.std.StdQTException.checkError(StdQTException.java:38)
           at quicktime.std.sg.SGChannel.allocate(SGChannel.java:63)
           at quicktime.std.sg.SGChannel.<init>(SGChannel.java:56)
           at quicktime.std.sg.VisualChannel.<init>(SGVideoChannel.java:41)
           at quicktime.std.sg.SGVideoChannel.<init>(SGVideoToDisk.java:47)
           at VideoCaptureToDisk.setUpVideoGrab(VideoCaptureToDisk.java:65)
           at VideoCaptureToDisk.<init>(VideoCaptureToDisk.java:39)
           at VideoCaptureToDisk.main(VideoCaptureToDisk.java:108)
 

kindly help me.. i need audio and video capturing features in one of my softwares... waiting for your reply
mail me at- [e-mail]

[Meherdad Bomanbehram]

Hello Paramjeet Rana,
try for more info
http://www.java-tips.org/java-se-tips/javax.sound/capturing-audio-with-java-sound-api.html

or
http://java.sun.com/docs/books/tutorial/sound/sampled-overview.html
[ October 21, 2008: Message edited by: Meherdad Bomanbehram ]