Which analog video controller should I choose?

Question

Video

Hello.
Recommend a controller that can process online data from 4 sources at the same time, the simplest functions are to overlay pixels of certain colors, and access pixels from different inputs. So that you can synthesize one picture from several sources.
Only one video output is needed. But I would like 6-8 inputs so that you can switch between them. Video resolution is not very large 1024 * 768. controller for processing analog video

Answer 1

The best "controller" in this case is a stronger processor and gstreamer ffmpegovich to it.
Where do you want to dig analog video in 2015? Really with D-SUB VGA intend to grab?

Answer 2

alas, but for a number of reasons, it is the controller that is needed and not the computer, even single-board computers such as raspberry pie will not work. Need controller type like atmega. Those. no OS, fast boot, low power and all that stuff. Analog video from analog video cameras.