I have searched a long time on the internet but i didn't find any interesting solution.
I'm thinking about writing a such codec using source code available but i have no idea how complex is the task.
Also i have no idea how to start...
http://www.3gpp.org/ftp/Specs/archive/26_series/26.073/26073-600.zip
http://www.sun.com/software/communitysource/jmf/download.xml