How to stream video (and process) into FPGA

1. Ethernet.

well i am not really familiar with the streaming options.

i would really like to get a basic idea, high level view of the flow i need to go through...

this is the type of camera i want to use:

https://en.ids-imaging.com/store/ui-3140cp-rev-2.html

or equivalent to that..

now lets say the interface is GigE.

whats next, what my next stop from the camera?

I will dive into it, but first i need to understand the basics.. what am i dealing with.

especially if i want high resolution and high frame rate.

a note: please don't be discouraged from my knowledge in the subject.

i really want to get into this world, and even if i'll need to outsource this time, part of the things, i need and want to understand what i am facing.

2. if i want to do image differentiation, i don't really need to store both frames as i can subtract the pixel as i overwrite the old ones. ( i think).

3. budget will be up to 200$ but preferably lower ofcourse. lets assume that all the FPGA needs to do is what is described here.

what family should i look into? do i need something fancier then cyclon V?

4. used mainly FPGA as CPLD didnt use RAM's like DDR or high speed

Thanks!!