Are there any backup camera solutions for Android tablets using an already installed camera?

A

AC Question

So I'm installing a Samsung Galaxy TAB a 10.1 tablet into my dash, that will be removable as well. I need to find a solution for the backup camera so I can sell my double DIN head unit and get a single DIN standard radio instead. I want to mount the tablet on top of the single DIN head unit that juts out a little.

Anyways, my truck has a backup camera stock from factory. The video cable is a RCA cable that I currently plug into my head unit. How do I getc that video signal into my tablet? I plan on using my phone as a hotspot for the tablet, so I think wifi might be out of the question since it will already be connected to that. Thanks guys for anyou ideas!