How to import Pipewire DMA Buf to nvenc for encoding?

[Adonca2203]

Hi, I'm currently working on a personal project for screen capturing and hardware encoder using pipewire in rust using both pipewire rust bindings and this crate for hw accelerated encoding.

I currently have a capture pipeline set up with pipewire which gives me all the information I need to create an AVDRMFrameDescriptor and I have a working version of what I want for VAAPI here which works great on AMD GPUs.

However it seems this same approach does not work for nvidia and am unable to use the same logic, although not entirely sure why.

I'm unable to find sources online as to what I need to do or what I may be missing here. I'm unsure if DRM Prime format works here or because nvidia I need to do something with CUDA?

Any help would be greatly appreciated and thank you for your time.