Are you by any chance using OBS software. If you are then this website may be helpful: GitHub - Xaymar/obs-studio_amf-encoder-plugin: AMD Advanced Media Framework Encoder Plugin for Open Broadcaster Studio
See if this website on AMF is helpful: https://gpuopen.com/gaming-product/advanced-media-framework/
Thank you for replying.
I've looked through these links, but found nothing mentioning possible to be used chroma schemes.
I do use OBS Studio, but with the default plugin for AMF (I think it was forked from the Xaymar's version). While I have configured the colorspace to either RGB or I444 in the advanced settings + 709 set to full space, it still comes out as 4:2:0 chroma after the recorded video is saved.
Thus I thought there could be some sort of limit, since the encoder's settings do not have settings for the colorspace nor chroma.