Splitting/Merging 3gp files using a java library

I'm wondering if there's a java library out there that can manipulate 3gp files. Mostly I'm interested in splitting or merging existing video files.

I've looked at JMF (java media framework), but it doesn't support 3gp…and FFmpeg looks p开发者_开发百科romising, but it's not clear that the library allows splitting/merging of existing files.

Does such a library exist?

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Try Xuggler http://www.xuggle.com/ (its FREE btw)