Appreciate the input, so short of the second pc setup there isn't really an encoder card option or as you said a second GPU would not be a resolution, Even with the Ryzen 7 5700G GFU side sitting dormant and unused which seems to be a shame not to use that side of the cpu..
Correct. A dedicated 'encoder card' just causes a TON of problems. It splits the PCIe lanes from 16x to 8x/8x, and increases the now-reduced PCIe bus utilization significantly to boot, as all the video data has to be transferred to the second card, instead of handled in place on a 1-GPU setup.
A single-GPU, generally nVidia given how good NVENC is at video encoding with no rendering resource impact, is highly recommended. At this point, Turing NVENC has effectively rendered 2PC setups pointless newbie-bait aside from some very rare edge-case scenarios. The return on time, expense, additional power draw, complexity of setup, audio routing headaches, inflexibility of capture, and additional potential points of failure introduced do not measure up, when Turing NVENC encodes on-par with x264 Slow to begin with, with no performance hit.
The 'background remover' is going to be CPU-intensive regardless though. Get a greenscreen and light it properly. Chromakeying is a very simple and lightweight process, compared to CV-based 'removal'.
