Which compact computer to choose for computer vision tasks?

Question

Iron

Good afternoon.
Tell me, please, what compact solutions are there in the field of computer vision?
I have a task to receive a video stream in H.264 from two IP cameras, decode it, carry out analytics and output the analyzed video further "outside". The cameras are in 1080p.
What is needed is a small compact computer that will be installed next to these cameras.
Programmatically, it will be Linux and software in c ++ using openCV.
Now looking at http://www.lex.com.tw/products/2I610DW.html

Answer 1

And you test your system on a regular computer, understand what loads and resources will be needed, and then you can decide how to "compact" this whole thing.

Answer 2

Raspberry Pi 3 (+ MatLab)?
True, I see the speed is rather low.