Send video stream from android device
There are two things involved in this.
 1. Implementation of RTSP
 2. Converting android camera output into RTSP source.

I could not find any open implementation while I was searching for it almost 6 months back. Here is the one which worked for me with little tuning. But you have to clone the repo and work on it directly to get it working
https://github.com/mutaphore/RTSP-Client-Server