Well, you need to set the specific ffmpeg flags as stated in the readme… If you already know them, its easy.

Glad I helped!

IMU, GPU encoding is for streaming: it aims at fast, not so great, output quality without CPU usage. Exactly what you are getting.

Don’t use GPU encoding for storage… CPU encoding is much better.

Edit: since its aimed at streaming, GPU encoding only needs to achieve real time performance, no need to go any faster. CPU encoding instead can go as fast as your cores can push.