Advice and help on where to start

Good day,

I have an eye-tracking project I want to complete using jetson nano. I am planning on implementing this in c++.

However I would like to know if there are any other options other than using openCV in c++, I found some references to the Libargus API but I cant find any real time image processing examples using this in c++?

Will it be significantly faster to implement a real time camera system using something other than Opencv ?

Please refer me to the correct documents/repository to help me,

Thanks :)

Suggest to check those projects sharing at Latest Jetson & Embedded Systems/Jetson Projects topics - NVIDIA Developer Forums to see if can find some references or ideas.