it’s located at : C:\ProgramData\Topaz Labs LLC\Topaz Video AI\models
(encoders.json)
if you prefer [lossless] in TVA instead, then HandBrake it to whatever you like.
You can set this Lossless Method in TVAI.
this is my method I use, Lossless encoding in TVAI -then-> Handbrake to x265 (libx265) crf 23.
In general libx265 (aka CPU / Software encoding) is much smaller in file size compared to NVEnc (GPU / Hardware encoding) x265 encoding at the same crf level/settings, some claim also it is better image quality, even though the size is smaller.
In general; CPU/libx265 generates smaller file size at the same image quality or even better image quality, then GPU/NVEnc encoding if same settings is used (crf).