Can I use a Mini to import video from multiple sources and simultaneously record those videos as separates files (much like a video security system)??

Here's my idea: currently I use a digital camcorder to record video from numerous bullet cameras while riding my sportbike. I have to use a video switcher to select which camera I want to record from. I would much rather record from ALL video sources simultaneously AND have it saved in digital format.

Problems: Is there hardware available for the Mini to accept multi-source video input? Is there an application software (or developer's software) available to handle the video recording into separate files?

Additionally: Is there software available for the Mini that will work with an inexpensive touchscreen? - my ideal design would allow me to select any of the incoming video signals via the touchscreen and view what that camera sees.

I know its a lot, but any assistance would be very much appreciated!!