On2's VP5

I was browsing around and ended up on On2's website. I found that they 
had some showcase of their java VP5 technology. The first link I found

http://www.on2.com/jplayer/index.php3

had a jar file containing a VP5Decoder.class and some file with the 
ending vp5J. I'm guessing the .vp5J file is just
some kind of raw stream. All in all this wasn't so interesting. But then 
I found the second link:

http://www.on2.com/applet/index.php3

Here On2 is showing a Harry Potter trailer in different resolutions. 
Here they didn't include the video in the jarfile. It was given as an 
argument to the applet. And the files where regular avi files with vp50 
fourcc and speex as the audio codec. And looking into the jarfiles 
reveiled alot more files this time. A complete speex decoder, a 
forgotten makefile, the VP5Decoder class and lots of other files. This 
was of MUCH more interest because it is working on regular avifiles. 
I've heard that java can be decompiled quite easy compared to other 
things. So I download a javadecompiler

http://www.geocities.com/kpdus/jad.html

and tried it on the VP5Decoder class. I was amased of the output from 
the decompiler. The source looks like regular code without the comments. 
So if anyone is going for VP5 this is a good startingpoint.

MvH
Benjamin Larsson



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