🚀 go-pugleaf

A friend of mine is involved in a project in which he would like to be
able to use a genlock type device to scale the incoming video image
and adjust it's position on the screen electronically. The idea is to
hook some electronics up to, say, the serial port of the Amiga then
run a process which opens a window, collects window sizing and
movement messages and controls the genlock to place the incoming video
signal in the window. (Handling window overlapping may be a problem
here, but that is another issue...)

Does anyone know of a genlock (or a combination of video hardware)
which would make this possible ?

thanks, mike.