GPRS based Live video streaming via 2G network

[emelearner]

Hi!!
I want to provide live video streaming on my website through edge providing upload data rate of maximum 400kbps. We will compress our video for achieving good result. Can anyone here have any idea about best compression method for mpeg4 video and how much compression we would have to achieve for acquiring good results..
please let me know if any one have work on this...