JSwiff Forum

Anonymous

Hi,

I've been able to extract GIF images no problem. The JPEG format is proving troublesome. Any ideas how to convert the byte array from getJpegData() to a .jpg file? I'll keep hacking away at it but I'd appreciate any help. (Most source code available on the net uses java.awt.image.Image, when I think java.awt.image.BufferedImage or java.awt.image.WritableRaster would be more appropriate in this case.)Will post source code when working.

Thanks in advance,

Alex

Anonymous

In case anyone else is curious, the byte[] from getJpegData() can be written to a file and read as valid jpg if you ignore the first 4 bytes.

Code:

 if (obj instanceof DefineBitsJPEG2) {
 	dbj = (DefineBitsJPEG2)obj;
 	id = dbj.getCharacterId();
 	bytJpeg = dbj.getJpegData();
 	try {
 		fos = new FileOutputStream(String.format("character_%1$03d.jpg", id));
 		// 
 		// skip first 4 bytes
 		// 
 		for (j = 4; j < bytJpeg.length; j += 256) {
 			if (bytJpeg.length - j < 256) {
 				fos.write(bytJpeg, j, bytJpeg.length - j);
 			} else {
 				fos.write(bytJpeg, j, 256);
 			}
 		}
 		fos.flush();
 		fos.close();
 	} catch (FileNotFoundException fnfe) {
 		System.out.println("fnfe");
 	} catch (IOException ioe) {
 		System.out.println("ioe");
 	}
 }

Ralf

Thanks a lot for sharing your code! If you want to share more, you can also use the wiki:
http://wiki.jswiff.com

jack · Joined: Apr 12, 2007 Messages: 2 Offline

if you ignore the first 4 bytes,the jpg which is from swf is nothing;
help?