I need two-way video communication for my application - it will be released on Apple's App Store so no private API's may be used.

I know nothing about video transmission but I need someone to do the heavy lifting in this part of my app. Essentially I am looking for a Facetime clone - I need the client to see both a small video from his camera and the majority of his screen to be filled with video from the other person.

I need the iOS code to be written for the video transmission and help to get my own servers up and running.