"I think open source community already have something similar but not in one piece
CMUCAM4 (but more processing more library support is required) + Arduino Video Experimenter or some open source OSD should do the job, Again some hardware integrator…"
"Digital vs. Analog Wireless Video Transfer
In the following video they have compared a 500mw digial wireless output vs 2500mw analogue wireless system
upto a distance of 600 m Diffrence is pretty much clear in analogue system u have…"