Hi, I'm totally newbie, I hope to post in the toght place.....
I have a PC with RGB (RCA) or HDMI output for TV or LCD (HDMI) screen.
I would like to grab a piece of output image (let's suppose the bottom left quarter) and send it to a device in digital mode.
My aint is to replicate a piece of screen on a graphic display.
Now, what's simplest way?
Use a chip to "decode" analog output from RCA output, trim it and send data to display, or do this in HDMI mode?