Equipment and software for chromakey

Question

Adobe

A question for amateur photographers who are faced with this task:

Which camera is suitable, and what is the name of this function when it is connected to a computer, and its image is transmitted to the monitor?

And what kind of software is free (I found only expensive adobe ultra) for real-time processing of a picture from a chroma key, i.e. I replaced the background and actually saved the photo already with the background.

Answer 1

So dig television equipment for weather registration)
Comp if HD at least collect disks in a raid. Otherwise brakes with reading. And ost. the more expensive the better.