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10/22/2010 9:07:13 PM
Title: how to capture the images from video file
Good Marning to all.
i have a requair ment for the capture the images from already saved local drive video file .When ever u play that video that time to click the capture button to get the image . I am trying to do this using frameGrabber.getFrame() showing null
pls suggest me any of the code is there pls send me .
Thankyou.
package com.medi;
import javax.swing.*;
import javax.swing.event.*;
import java.io.*;
import java.net.MalformedURLException;
import java.net.URL;
import javax.media.*;
import javax.media.format.*;
import javax.media.util.*;
import javax.media.control.*;
import javax.media.protocol.*;
import java.util.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import com.sun.image.codec.jpeg.*;
public class CaptureImage extends Panel implements ActionListener
{
public static Player player = null;
public CaptureDeviceInfo di = null;
public MediaLocator ml = null;
public JButton capture = null;
public Buffer buf = null;
public Image img = null;
public VideoFormat vf = null;
public BufferToImage btoi = null;
public ImagePanel imgpanel = null;
public CaptureImage(URL mediaURL)
{
setLayout(new BorderLayout());
setSize(320,550);
imgpanel = new ImagePanel();
capture = new JButton("Capture");
capture.addActionListener(this);
String str1 = "vfw:Logitech USB Video Camera:0";
String str2 = "vfw:Microsoft WDM Image Capture (Win32):0";
di = CaptureDeviceManager.getDevice(str2);
ml = di.getLocator();
try
{
player=Manager.createRealizedPlayer(mediaURL);
player.start();
try{
Thread.sleep(1000);
}
catch(Exception e)
{
}
Component comp;
if ((comp = player.getVisualComponent()) != null)
{
add(comp,BorderLayout.NORTH);
}
Component controls = player.getControlPanelComponent();
if (controls != null)
{
add(controls,BorderLayout.NORTH);
add(comp,BorderLayout.NORTH);
}
add(capture,BorderLayout.CENTER);
add(imgpanel,BorderLayout.SOUTH);
}
catch (Exception e)
{
e.printStackTrace();
}
}
public static void main(String[] args)
{
JFileChooser fileChooser = new JFileChooser();
int result = fileChooser.showOpenDialog( null );
URL mediaURL = null;
if ( result == JFileChooser.APPROVE_OPTION ) // user chose a file
{
try
{
// get the file as URL
mediaURL = fileChooser.getSelectedFile().toURL();
} // end try
catch (MalformedURLException malformedURLException )
{
System.err.println( "Could not create URL for the file" );
} // end catch
} // end outer if
Frame f = new Frame("SwingCapture");
CaptureImage cf = new CaptureImage(mediaURL);
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
CaptureImage.playerclose();
System.exit(0);}});
f.add("Center",cf);
f.pack();
f.setSize(new Dimension(320,550));
f.setVisible(true);
}
public static void playerclose()
{
player.close();
player.deallocate();
}
public void actionPerformed(ActionEvent e)
{
JComponent c = (JComponent) e.getSource();
if (c == capture)
{
// Grab a frame
FrameGrabbingControl fgc = (FrameGrabbingControl)player.getControl("javax.media.control.FrameGrabbingControl");
player.prefetch();
buf = fgc.grabFrame();
btoi = new BufferToImage((VideoFormat)buf.getFormat());
img = btoi.createImage(buf);
// show the image
imgpanel.setImage(img);
// save image
saveJPG(img,"c:\\test.jpg");
}
}
class ImagePanel extends Panel
{
public Image myimg = null;
public ImagePanel()
{
setLayout(null);
setSize(320,240);
}
public void setImage(Image img)
{
this.myimg = img;
repaint();
}
public void paint(Graphics g)
{
if (myimg != null)
{
g.drawImage(myimg, 0, 0, this);
}
}
}
public static void saveJPG(Image img, String s)
{
BufferedImage bi = new BufferedImage(img.getWidth(null), img.getHeight(null), BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = bi.createGraphics();
g2.drawImage(img, null, null);
FileOutputStream out = null;
try
{
out = new FileOutputStream(s);
}
catch (java.io.FileNotFoundException io)
{
System.out.println("File Not Found");
}
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bi);
param.setQuality(0.5f,false);
encoder.setJPEGEncodeParam(param);
try
{
encoder.encode(bi);
out.close();
}
catch (java.io.IOException io)
{
System.out.println("IOException");
}
}
}
1
I have some idea why it happens , the videos that are using hardware acceleration while playing are not available in screen buffer but rendered directly by video card. This kind of video will appear as black block if we try to capture using Print Screen key or some screen capturing application.
2
Hi,
Some probleam occures in my application that is when ever to play the video file that time capture the images this is my require ment. I am trying to this but get the null value from franegrabber().
Some of the my code to chane some of the local video files (mpeg) playing but not capture the images .
any soluation for this pls send trhe code .
I am send to my code
Some probleam occures in my application that is when ever to play the video file that time capture the images this is my require ment. I am trying to this but get the null value from franegrabber().
Some of the my code to chane some of the local video files (mpeg) playing but not capture the images .
any soluation for this pls send trhe code .
I am send to my code
package com.medi;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.FileDialog;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.awt.image.BufferedImage;
import java.awt.image.ImageObserver;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.util.Vector;
import javax.media.Buffer;
import javax.media.CannotRealizeException;
import javax.media.CaptureDeviceInfo;
import javax.media.CaptureDeviceManager;
import javax.media.Format;
import javax.media.Manager;
import javax.media.MediaLocator;
import javax.media.NoPlayerException;
import javax.media.Player;
import javax.media.control.FormatControl;
import javax.media.control.FrameGrabbingControl;
import javax.media.format.VideoFormat;
import javax.media.util.BufferToImage;
import javax.swing.AbstractAction;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JToolBar;
import javax.swing.UIManager;
import javax.swing.WindowConstants;
import javax.swing.border.EtchedBorder;
import com.medi.Capture.MySnapshot;
import com.medi.CaptureImage.ImagePanel;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
import com.sun.media.protocol.vfw.VFWCapture;
public class JWebCam extends JFrame
implements WindowListener, ComponentListener
{
protected final static int MIN_WIDTH = 100; // 320;
protected final static int MIN_HEIGHT = 100; // 240;
protected static int shotCounter = 1;
protected JLabel statusBar = null;
protected JPanel visualContainer = null;
protected Component visualComponent = null;
protected JToolBar toolbar = null;
protected MyToolBarAction formatButton = null;
protected MyToolBarAction captureButton = null;
protected Player player = null;
protected CaptureDeviceInfo webCamDeviceInfo = null;
protected MediaLocator ml = null;
protected Dimension imageSize = null;
protected FormatControl formatControl = null;
protected VideoFormat currentFormat = null;
protected Format[] videoFormats = null;
protected MyVideoFormat[] myFormatList = null;
protected MyCaptureDeviceInfo[] myCaptureDevices = null;
protected URL url=null;
protected boolean initialised = false;
protected FrameGrabbingControl fg=null;
protected Buffer buf=null;
protected BufferToImage btoi=null;
protected Image img=null;
protected ImagePanel imagepanel=null;
public JWebCam ( String frameTitle )
{
super ( frameTitle );
try
{
UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
}
catch ( Exception cnfe )
{
System.out.println ("Note : Cannot load look and feel settings");
}
setSize ( 320, 260 ); // default size...
addWindowListener ( this );
addComponentListener ( this );
getContentPane().setLayout ( new BorderLayout() );
visualContainer = new JPanel();
visualContainer.setLayout ( new BorderLayout() );
getContentPane().add ( visualContainer, BorderLayout.CENTER );
statusBar = new JLabel ("")
{
public Dimension getPreferredSize ( )
{
return ( new Dimension ( 10, super.getPreferredSize().height ) );
}
};
statusBar.setBorder ( new EtchedBorder() );
getContentPane().add ( statusBar, BorderLayout.SOUTH );
}
public boolean initialise ( )
throws Exception
{
MyCaptureDeviceInfo[] cams = autoDetect();
if ( cams.length > 0 )
{
if ( cams.length == 1 )
{
System.out.println ("Note : 1 web cam detected");
return ( initialise ( cams[0].capDevInfo ) );
}
else
{
System.out.println ("Note : " + cams.length + " web cams detected");
Object selected = JOptionPane.showInputDialog (this,
"Select Video format",
"Capture format selection",
JOptionPane.INFORMATION_MESSAGE,
null, // Icon icon,
cams, // videoFormats,
cams[0] );
if ( selected != null )
{
return ( initialise ( ((MyCaptureDeviceInfo)selected).capDevInfo ) );
}
else
{
return ( initialise ( null ) );
}
}
}
else
{
return ( initialise ( null ) );
}
}
public boolean initialise ( CaptureDeviceInfo _deviceInfo )
throws Exception
{
statusBar.setText ( "Initialising...");
webCamDeviceInfo = _deviceInfo;
if ( webCamDeviceInfo != null )
{
statusBar.setText ( "Connecting to : " + webCamDeviceInfo.getName() );
try
{
setUpToolBar();
getContentPane().add ( toolbar, BorderLayout.NORTH );
//ml = webCamDeviceInfo.getLocator();
//if ( url != null )
// {
url=new URL("file:E:/video10.mpeg");
player = Manager.createRealizedPlayer(url);
if ( player != null )
{
player.start();
Thread.sleep(1000);
formatControl = (FormatControl)player.getControl ( "javax.media.control.FormatControl" );
videoFormats = webCamDeviceInfo.getFormats();
myFormatList = new MyVideoFormat[videoFormats.length];
for ( int i=0; i<videoFormats.length; i++ )
{
myFormatList[i] = new MyVideoFormat ( (VideoFormat)videoFormats[i] );
}
Format currFormat = formatControl.getFormat();
visualComponent = player.getVisualComponent();
if ( visualComponent != null )
{
visualContainer.add ( visualComponent, BorderLayout.CENTER );
if ( currFormat instanceof VideoFormat )
{
currentFormat = (VideoFormat)currFormat;
imageSize = currentFormat.getSize();
visualContainer.setPreferredSize ( imageSize );
setSize ( imageSize.width, imageSize.height + statusBar.getHeight() + toolbar.getHeight() );
}
else
{
System.err.println ("Error : Cannot get current video format");
}
invalidate();
pack();
return ( true );
}
else
{
System.err.println ("Error : Could not get visual component");
return ( false );
}
}
// else
//{
// System.err.println ("Error : Cannot create player");
// statusBar.setText ( "Cannot create player" );
// return ( false );
//}
//}
else
{
System.err.println ("Error : No MediaLocator for " + webCamDeviceInfo.getName() );
statusBar.setText ( "No Media Locator for : " + webCamDeviceInfo.getName() );
return ( false );
}
}
catch ( IOException ioEx )
{
System.err.println ("Error connecting to [" + webCamDeviceInfo.getName() + "] : " + ioEx.getMessage() );
statusBar.setText ( "Connecting to : " + webCamDeviceInfo.getName() );
return ( false );
}
catch ( NoPlayerException npex )
{
statusBar.setText ("Cannot create player");
return ( false );
}
catch ( CannotRealizeException nre )
{
statusBar.setText ( "Cannot realize player");
return ( false );
}
}
else
{
return ( false );
}
}
public void setFormat ( VideoFormat selectedFormat )
{
if ( formatControl != null )
{
// player.stop(); // not needed and big performance hit
currentFormat = selectedFormat;
if ( visualComponent != null )
{
visualContainer.remove ( visualComponent );
}
imageSize = currentFormat.getSize();
visualContainer.setPreferredSize ( imageSize );
statusBar.setText ( "Format : " + currentFormat );
System.out.println ("Format : " + currentFormat );
formatControl.setFormat ( currentFormat );
// player.start();
visualComponent = player.getVisualComponent();
if ( visualComponent != null )
{
visualContainer.add ( visualComponent, BorderLayout.CENTER );
}
invalidate();
pack();
}
else
{
System.out.println ("Visual component not an instance of FormatControl");
statusBar.setText ( "Visual component cannot change format" );
}
}
public VideoFormat getFormat ( )
{
return ( currentFormat );
}
protected void setUpToolBar ( )
{
toolbar = new JToolBar();
// Note : due to cosmetic glitches when undocking and docking the toolbar,
// I've set this to false.
toolbar.setFloatable(true);
formatButton = new MyToolBarAction ( "Resolution", "BtnFormat.jpg" );
captureButton = new MyToolBarAction ( "Capture", "BtnCapture.jpg" );
toolbar.add ( formatButton );
toolbar.add ( captureButton );
getContentPane().add ( toolbar, BorderLayout.NORTH );
}
protected void toolbarHandler ( MyToolBarAction actionBtn )
{
if ( actionBtn == formatButton )
{
Object selected = JOptionPane.showInputDialog (this,
"Select Video format",
"Capture format selection",
JOptionPane.INFORMATION_MESSAGE,
null, // Icon icon,
myFormatList, // videoFormats,
currentFormat );
if ( selected != null )
{
setFormat ( ((MyVideoFormat)selected).format );
}
}
else if ( actionBtn == captureButton )
{
Image photo = grabFrameImage ( );
if ( photo != null )
{
MySnapshot snapshot = new MySnapshot ( photo, new Dimension ( imageSize ) );
}
else
{
System.err.println ("Error : Could not grab frame");
}
}
else
{
}
}
public MyCaptureDeviceInfo[] autoDetect ( )
{
Vector list = CaptureDeviceManager.getDeviceList ( null );
CaptureDeviceInfo devInfo = null;
String name;
Vector capDevices = new Vector();
if ( list != null )
{
for ( int i=0; i<list.size(); i++ )
{
devInfo = (CaptureDeviceInfo)list.elementAt ( i );
name = devInfo.getName();
if ( name.startsWith ("vfw:") )
{
System.out.println ("DeviceManager List : " + name );
capDevices.addElement ( new MyCaptureDeviceInfo ( devInfo ) );
}
}
}
else
{
for ( int i = 0; i < 10; i++ )
{
try
{
name = VFWCapture.capGetDriverDescriptionName ( i );
if (name != null && name.length() > 1)
{
devInfo = com.sun.media.protocol.vfw.VFWSourceStream.autoDetect ( i );
if ( devInfo != null )
{
System.out.println ("VFW Autodetect List : " + name );
capDevices.addElement ( new MyCaptureDeviceInfo ( devInfo ) );
}
}
}
catch ( Exception ioEx )
{
System.err.println ("Error connecting to [" + webCamDeviceInfo.getName() + "] : " + ioEx.getMessage() );
// ignore errors detecting device
statusBar.setText ( "AutoDetect failed : " + ioEx.getMessage() );
}
}
}
MyCaptureDeviceInfo[] detected = new MyCaptureDeviceInfo[ capDevices.size() ];
for ( int i=0; i<capDevices.size(); i++ )
{
detected[i] = (MyCaptureDeviceInfo)capDevices.elementAt ( i );
}
return ( detected );
}
public void deviceInfo ( )
{
if ( webCamDeviceInfo != null )
{
Format[] formats = webCamDeviceInfo.getFormats();
if ( ( formats != null ) && ( formats.length > 0 ) )
{
}
for ( int i=0; i<formats.length; i++ )
{
Format aFormat = formats[i];
if ( aFormat instanceof VideoFormat )
{
Dimension dim = ((VideoFormat)aFormat).getSize();
// System.out.println ("Video Format " + i + " : " + formats[i].getEncoding() + ", " + dim.width + " x " + dim.height );
}
}
}
else
{
System.out.println ("Error : No web cam detected");
}
}
public Buffer grabFrameBuffer ( )
{
if ( player != null )
{
FrameGrabbingControl fgc = (FrameGrabbingControl)player.getControl ( "javax.media.control.FrameGrabbingControl" );
if ( fgc != null )
{
return ( fgc.grabFrame() );
}
else
{
System.err.println ("Error : FrameGrabbingControl is null");
return ( null );
}
}
else
{
System.err.println ("Error : Player is null");
return ( null );
}
}
public Image grabFrameImage ( )
{
Buffer buffer = grabFrameBuffer();
if ( buffer != null )
{
// Convert it to an image
BufferToImage btoi = new BufferToImage ( (VideoFormat)buffer.getFormat() );
if ( btoi != null )
{
Image image = btoi.createImage ( buffer );
if ( image != null )
{
return ( image );
}
else
{
System.err.println ("Error : BufferToImage cannot convert buffer");
return ( null );
}
}
else
{
System.err.println ("Error : cannot create BufferToImage instance");
return ( null );
}
}
else
{
System.out.println ("Error : Buffer grabbed is null");
return ( null );
}
}
public void playerClose ( )
{
if ( player != null )
{
player.close();
player.deallocate();
player = null;
}
}
public void windowClosing ( WindowEvent e )
{
playerClose();
System.exit ( 1 );
}
public void componentResized ( ComponentEvent e )
{
Dimension dim = getSize();
boolean mustResize = false;
if ( dim.width < MIN_WIDTH )
{
dim.width = MIN_WIDTH;
mustResize = true;
}
if ( dim.height < MIN_HEIGHT )
{
dim.height = MIN_HEIGHT;
mustResize = true;
}
if ( mustResize )
setSize ( dim );
}
public void windowActivated ( WindowEvent e ) { }
public void windowClosed ( WindowEvent e ) { }
public void windowDeactivated ( WindowEvent e ) { }
public void windowDeiconified ( WindowEvent e ) { }
public void windowIconified ( WindowEvent e ) { }
public void windowOpened ( WindowEvent e ) { }
public void componentHidden(ComponentEvent e) { }
public void componentMoved(ComponentEvent e) { }
public void componentShown(ComponentEvent e) { }
protected void finalize ( ) throws Throwable
{
playerClose();
super.finalize();
}
class MyToolBarAction extends AbstractAction
{
public MyToolBarAction ( String name, String imagefile )
{
super ( name );
}
public void actionPerformed ( ActionEvent event )
{
toolbarHandler ( this );
}
};
class MyVideoFormat
{
public VideoFormat format;
public MyVideoFormat ( VideoFormat format )
{
this.format = format;
}
public String toString ( )
{
Dimension dim = format.getSize();
return ( format.getEncoding() + " [ " + dim.width + " x " + dim.height + " ]" );
}
};
class MyCaptureDeviceInfo
{
public CaptureDeviceInfo capDevInfo;
public MyCaptureDeviceInfo ( CaptureDeviceInfo devInfo )
{
capDevInfo = devInfo;
}
public String toString ( )
{
return ( capDevInfo.getName() );
}
};
class MySnapshot extends JFrame implements ImageObserver
{
protected Image photo = null;
protected int shotNumber;
public MySnapshot ( Image grabbedFrame, Dimension imageSize )
{
super ( );
shotNumber = shotCounter++;
setTitle ( "Photo" + shotNumber );
photo = grabbedFrame;
setDefaultCloseOperation ( WindowConstants.DISPOSE_ON_CLOSE );
int imageHeight = photo.getWidth ( this );
int imageWidth = photo.getHeight ( this );
setSize ( imageSize.width, imageSize.height );
final FileDialog saveDialog = new FileDialog ( this, "Save JPEG", FileDialog.SAVE );
final JFrame thisCopy = this;
saveDialog.setFile ( "Photo" + shotNumber );
addWindowListener ( new WindowAdapter()
{
public void windowClosing ( WindowEvent e )
{
saveDialog.show();
String filename = saveDialog.getFile();
if ( filename != null )
{
if ( saveJPEG ( filename ) )
{
JOptionPane.showMessageDialog ( thisCopy, "Saved " + filename );
setVisible ( false );
dispose();
}
else
{
JOptionPane.showMessageDialog ( thisCopy, "Error saving " + filename );
}
}
else
{
setVisible ( false );
dispose();
}
}
}
);
setVisible ( true );
}
public void paint ( Graphics g )
{
super.paint ( g );
g.drawImage ( photo, 0, 0, getWidth(), getHeight(), Color.black, this );
}
public boolean saveJPEG ( String filename )
{
boolean saved = false;
BufferedImage bi = new BufferedImage ( photo.getWidth(null),
photo.getHeight(null),
BufferedImage.TYPE_INT_RGB );
Graphics2D g2 = bi.createGraphics();
g2.drawImage ( photo, null, null );
FileOutputStream out = null;
try
{
out = new FileOutputStream ( filename );
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder ( out );
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam ( bi );
param.setQuality ( 1.0f, false );
encoder.setJPEGEncodeParam ( param );
encoder.encode ( bi );
out.close();
saved = true;
}
catch ( Exception ex )
{
System.out.println ("Error saving JPEG : " + ex.getMessage() );
}
return ( saved );
}
} // of MySnapshot
public static void main (String[] args )
{
try
{
JWebCam myWebCam = new JWebCam ( "Web Cam Capture" );
myWebCam.setVisible ( true );
if ( !myWebCam.initialise() )
{
System.out.println ("Web Cam not detected / initialised");
}
}
catch ( Exception ex )
{
ex.printStackTrace();
}
}
}
3
i want receive how System.out print work
Insert Code here
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