I have the following code it works for mpg files
But it grabs every frame of video
I want to grab Single particular frame or/at particular time
plz help me and post the modified code
Its urgent
Code:

import java.awt.*;
import javax.media.*;
import javax.media.control.TrackControl;
import javax.media.Format;
import javax.media.format.*;
import java.io.*;
import javax.imageio.*;
import javax.imageio.stream.*;
import java.awt.image.*;
import java.util.*;
import javax.media.util.*;

/**
* Sample program to access individual video frames by using a 
* "pass-thru" codec. The codec is inserted into the data flow
* path. As data pass through this codec, a callback is invoked
* for each frame of video data.
*/
public class FrameAccess implements ControllerListener {

    Processor p;
    Object waitSync = new Object();
    boolean stateTransitionOK = true;
    public boolean alreadyPrnt = false;

    /**
    * Given a media locator, create a processor and use that processor
    * as a player to playback the media.
    *
    * During the processor's Configured state, two "pass-thru" codecs,
    * PreAccessCodec and PostAccessCodec, are set on the video track. 
    * These codecs are used to get access to individual video frames 
    * of the media.
    *
    * Much of the code is just standard code to present media in JMF.
    */
    public boolean open(MediaLocator ml) {

        try {
            p = Manager.createProcessor(ml);
        } catch (Exception e) {
            System.err.println(
                "Failed to create a processor from the given url: " + e);
            return false;
        }

        p.addControllerListener(this);

        // Put the Processor into configured state.
        p.configure();
        if (!waitForState(Processor.Configured)) {
            System.err.println("Failed to configure the processor.");
            return false;
        }

        // So I can use it as a player.
        p.setContentDescriptor(null);

        // Obtain the track controls.
        TrackControl tc[] = p.getTrackControls();

        if (tc == null) {
            System.err.println(
                "Failed to obtain track controls from the processor.");
            return false;
        }

        // Search for the track control for the video track.
        TrackControl videoTrack = null;

        for (int i = 0; i < tc.length; i++) {
            if (tc[i].getFormat() instanceof VideoFormat) 
            videoTrack = tc[i];
            else    tc[i].setEnabled(false);
        }

        if (videoTrack == null) {
            System.err.println("The input media does not contain a video track.");
            return false;
        }
        String videoFormat = videoTrack.getFormat().toString();
        Dimension videoSize = parseVideoSize(videoFormat);
        System.err.println("Video format: " + videoFormat);

        // Instantiate and set the frame access codec to the data flow path.
        try {
            Codec codec[] = { new PostAccessCodec(videoSize)};
            videoTrack.setCodecChain(codec);
        } catch (UnsupportedPlugInException e) {
            System.err.println("The process does not support effects.");
        }

        // Realize the processor.
        p.prefetch();
        if (!waitForState(Processor.Prefetched)) {
            System.err.println("Failed to realise the processor.");
            return false;
        }

        p.start();
        return true;
    }

    /**parse the size of the video from the string videoformat*/
    public Dimension parseVideoSize(String videoSize){
        int x=300, y=200;
        StringTokenizer strtok = new StringTokenizer(videoSize, ", ");
        strtok.nextToken();
        String size = strtok.nextToken();
        StringTokenizer sizeStrtok = new StringTokenizer(size, "x");
        try{
            x = Integer.parseInt(sizeStrtok.nextToken());
            y = Integer.parseInt(sizeStrtok.nextToken());
        } catch (NumberFormatException e){
            System.out.println("unable to find video size, assuming default of 300x200");
        }
        System.out.println("Image width  = " + String.valueOf(x) +"\nImage height = "+ String.valueOf(y));
        return new Dimension(x, y);
    }


    /**
    * Block until the processor has transitioned to the given state.
    * Return false if the transition failed.
    */
    boolean waitForState(int state) {
        synchronized (waitSync) {
            try {
                while (p.getState() != state && stateTransitionOK)
                    waitSync.wait();
            } catch (Exception e) {
            }
        }
        return stateTransitionOK;
    }

    /**
    * Controller Listener.
    */
    public void controllerUpdate(ControllerEvent evt) {

        if (evt instanceof ConfigureCompleteEvent
            || evt instanceof RealizeCompleteEvent
            || evt instanceof PrefetchCompleteEvent) {
            synchronized (waitSync) {
                stateTransitionOK = true;
                waitSync.notifyAll();
            }
        } else if (evt instanceof ResourceUnavailableEvent) {
            synchronized (waitSync) {
                stateTransitionOK = false;
                waitSync.notifyAll();
            }
        } else if (evt instanceof EndOfMediaEvent) {
            p.close();
            System.exit(0);
        }
    }

    /**
    * Main program
    */
    public static void main(String[] args) {

        if (args.length == 0) {
            prUsage();
            System.exit(0);
        }

        String url = args[0];

        if (url.indexOf(":") < 0) {
            prUsage();
            System.exit(0);
        }

        MediaLocator ml;

        if ((ml = new MediaLocator(url)) == null) {
            System.err.println("Cannot build media locator from: " + url);
            System.exit(0);
        }

        FrameAccess fa = new FrameAccess();

        if (!fa.open(ml))
            System.exit(0);
    }

    static void prUsage() {
        System.err.println("Usage: java FrameAccess <url>");
    }

    /*********************************************************
    * Inner class.
    *
    * A pass-through codec to access to individual frames.
    *********************************************************/

    public class PreAccessCodec implements Codec {

        /**
        * Callback to access individual video frames.
        */
        void accessFrame(Buffer frame) {

            // For demo, we'll just print out the frame #, time &
            // data length.

            long t = (long) (frame.getTimeStamp() / 10000000f);

            System.err.println(
                "Pre: frame #: "
                    + frame.getSequenceNumber()
                    + ", time: "
                    + ((float) t) / 100f
                    + ", len: "
                    + frame.getLength());
        }

        /**
        * The code for a pass through codec.
        */

        // We'll advertize as supporting all video formats.
        protected Format supportedIns[] = new Format[] { new VideoFormat(null)};

        // We'll advertize as supporting all video formats.
        protected Format supportedOuts[] = new Format[] { new VideoFormat(null)};

        Format input = null, output = null;

        public String getName() {
            return "Pre-Access Codec";
        }

        //these dont do anything
        public void open() {}
        public void close() {}
        public void reset() {}

        public Format[] getSupportedInputFormats() {
            return supportedIns;
        }

        public Format[] getSupportedOutputFormats(Format in) {
            if (in == null)
                return supportedOuts;
            else {
                // If an input format is given, we use that input format
                // as the output since we are not modifying the bit stream
                // at all.
                Format outs[] = new Format[1];
                outs[0] = in;
                return outs;
            }
        }

        public Format setInputFormat(Format format) {
            input = format;
            return input;
        }

        public Format setOutputFormat(Format format) {
            output = format;
            return output;
        }

        public int process(Buffer in, Buffer out) {

            // This is the "Callback" to access individual frames.
            accessFrame(in);

            // Swap the data between the input & output.
            Object data = in.getData();
            in.setData(out.getData());
            out.setData(data);

            // Copy the input attributes to the output
            out.setFlags(Buffer.FLAG_NO_SYNC);
            out.setFormat(in.getFormat());
            out.setLength(in.getLength());
            out.setOffset(in.getOffset());

            return BUFFER_PROCESSED_OK;
        }

        public Object[] getControls() {
            return new Object[0];
        }

        public Object getControl(String type) {
            return null;
        }
    }

    public class PostAccessCodec extends PreAccessCodec {
        // We'll advertize as supporting all video formats.
        public PostAccessCodec(Dimension size) {
            supportedIns = new Format[] { new RGBFormat()};
            this.size = size;
        }

        /**
        * Callback to access individual video frames.
        */
        void accessFrame(Buffer frame) {

            // For demo, we'll just print out the frame #, time &
            // data length.
            if (!alreadyPrnt) {
                BufferToImage stopBuffer = new BufferToImage((VideoFormat) frame.getFormat());
                Image stopImage = stopBuffer.createImage(frame);
                try {
                    BufferedImage outImage = new BufferedImage(size.width, size.height, BufferedImage.TYPE_INT_RGB);
                    Graphics og = outImage.getGraphics();
                    og.drawImage(stopImage, 0, 0, size.width, size.height, null);
                    //prepareImage(outImage,rheight,rheight, null);
                    Iterator writers = ImageIO.getImageWritersByFormatName("jpg");
                    ImageWriter writer = (ImageWriter) writers.next();

                    //Once an ImageWriter has been obtained, its destination must be set to an ImageOutputStream: 
                    File f = new File(frame.getSequenceNumber() + ".jpg");
                    ImageOutputStream ios = ImageIO.createImageOutputStream(f);
                    writer.setOutput(ios);

                    //Finally, the image may be written to the output stream: 
                    //BufferedImage bi;
                    //writer.write(imagebi);
                    writer.write(outImage);
                    ios.close();
                } catch (IOException e) {
                    System.out.println("Error :" + e);
                }
            }
            //alreadyPrnt = true;
            long t = (long) (frame.getTimeStamp() / 10000000f);
            System.err.println(
                "Post: frame #: "
                    + frame.getSequenceNumber()
                    + ", time: "
                    + ((float) t) / 100f
                    + ", len: "
                    + frame.getLength());
        }

        public String getName() {
            return "Post-Access Codec";
        }
        private Dimension size;
    }
}

Edited 3 Years Ago by Reverend Jim: Fixed formatting

first thing I don' t know the way to post I was in hurry & it was urgent
second I want to grab the image on button click
when the video is being played.

This article has been dead for over six months. Start a new discussion instead.