splitting 3gp file in JMF

I want to split a .3gp video into 2 separate .3gp file using java. so is it possible to do so? the .3gp file structure will also be a great help. i searched in google but did not find any suitable specification. thus if any one help, it would be great......
[264 byte] By [HybridBoya] at [2007-11-27 9:44:40]
# 1
please help me in this .... i am really stuck. i cant find any code to split 3gp file neither i can get any file format specification , byte wise....so please help ...
HybridBoya at 2007-7-12 23:51:50 > top of Java-index,Security,Cryptography...