I have a 7" LCD which has a VGA and a RCA input.
It's going to go to in my car eventually. The RCA input will be connected to a reverse camera. I need to make something up to go between the RCA input and the reverse camera to mask (in black) parts of this input. So when you get a square picture of whatever's behind your car, I need some of it to be masked in black.
Is there a device or way of doing this at all?