Programming Forums - Real Time Stream Video Library

Does anyone know of an open source, cross platform (Linux, Mac OS X, Windows) real time streaming video library?

What I am looking for is something that will allow me to take a video source I am already capturing, send it frames over the network, then give me back the frames so I can display them myself. I don't want something which connects to camera/movie file itself and streams the video to a special player. I want a *library*, not a set of applications that can stream video to each other.

The closest I have found is the Mpeg4IP project. It looks to be what I want, but I can't seem to find any documentation on its internals. The only "docs" for it are the implementations of the a real time streaming application, and a simple player. Those both use a decent amount of its internal libraries. So if someone could point in the direction of betters docs for it, that would be equivalent.