simple rtsp broadcast example source

I want to broadcast the screen (not a static screen) of my program using rtsp/rtp since this way a mobile phone (at least the more recent ones) can view the stream. I'm looking for a simple example program which takes the frames I offer, encodes it with a codec and then sends this (using rtsp) to any clients attached. I've looked on the net and all I can find so far are full fledged opensource media servers (like darwin) which are just too complex to use as an example any help appreciated! R p.s. sending jpegs to the mobile phone is really not an option since this is non standard and would require a mobile app to be installed to interpret the 'stream'. p.s.2 C, C++ or C# would be fine.