Extract the full RAR file, then simply drag a video file on one of the quality presets. The scripts will run FFmpeg, convert the video using NVENC and show you the output folder.
An existing FFmpeg installation is checked by the scripts. If FFmpeg is in the PATH environment variable (system or user), the scripts will refrain from downloading FFmpeg. If an existing FFmpeg install can't be found, the scripts will automatically proceed downloading FFmpeg before converting any file.
Copy and paste existing presets to the same directory, then rename and open the batch file with any text editor. Change the variables to whatever suits you. Example:
set width=852
set height=480
set cq=27
set maxrate=2.5M
set buffer=2.75M
set fps=30
set gop=15
set profile=main
Make sure to include the headers and footers of the scripts or they won't work.
Credits for the third party tools contained in this tool are due to the respective owners. I don't want in any possible existing (or non-existing) way to claim to be the owner of the third party tools, programs and scripts that are as well contained in this tool.