I wonder if this OBS forum thread can help you? https://obsproject.com/forum/threads/true-constant-quality-mode-for-h264_nve... ==== rc=constqp and cq=2 ==== While how it work under the hood is question worth many threads .... our profile is veeeery basic, but it worked for me on GT710, so I suggest to put more advanced settings into another, new profile... mp4 h264_nvenc # encode for nvidia graphics hw only preset medium profile main