I'm looking to make something I can put between a video/audio source (DVI/DP) and a 240hz monitor that can, with precise timing, replace single frames with a solid color. (the application is around device testing and calibration and could be used with monitors that support other refresh rates)
So, say, every 100th (1/240)s long frames should display a solid red frame, but otherwise pass through the video/audio stream we're receiving during the rest of the time.
Are microprocessors sufficient for this application? An FPGA board feels overboard, but I'm unsure. Do you have any recommendations? What about if I wanted to modify the color of every pixel slightly in an independent way (increasing brightness, say), to help with calibration?
Thanks for pointing me in the right direction, most advice I've seen has been focused on more complicated processing requirements and I'm trying to avoid implementation complexity if possible.