Create Thumbnail From Flv File

Question

Hi to all,
I want to create a thumbnail image from flv video file.
I am reading the flv file via FileInputStream as a byte array and i try to create a image file from that array. But i get only Block Image. Is there anyother way to do it
import java.io.*;
import java.awt.*;
class sample
public static void main(String ars[])
try
Image temp = null;
File f=new File("sample.flv");
FileInputStream in=new FileInputStream(f);
byte a[]=new byte[(int)f.length()];
int offset = 0;
int numRead = 0;
while (offset < a.length
&& (numRead=in.read(a, offset, a.length-offset)) >= 0) {
offset += numRead;
temp = Toolkit.getDefaultToolkit().createImage(a);
java.awt.image.BufferedImage bufferedImage =
          new java.awt.image.BufferedImage(800,600, java.awt.image.BufferedImage.TYPE_INT_RGB);
     java.awt.Graphics g = bufferedImage.createGraphics();               
     g.setColor(java.awt.Color.white);
     g.fillRect(0, 0, temp.getWidth(null),temp.getHeight(null));
     g.drawImage(temp, 0, 0, null);
     g.dispose();
     f = new File("sample1.jpg");
     FileOutputStream out = new FileOutputStream(f);
     com.sun.image.codec.jpeg.JPEGImageEncoder encoder = com.sun.image.codec.jpeg.JPEGCodec.createJPEGEncoder(out);
     com.sun.image.codec.jpeg.JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bufferedImage);     
     param.setQuality(7.0f, true);
     encoder.setJPEGEncodeParam(param);
     encoder.encode(bufferedImage);
catch(Exception ex)
System.out.print(ex);
Please Help to Me

Answer 1

You may start looking at external tables if it is that you want. Here is a link.
http://otn.oracle.com/pls/db10g/db10g.drilldown?remark=&word=external+tables&book=&preference=