Improving CodeFormer videos

[Selur]

In any case it could be a big enhancement to introduce "ffmpeg" as Video encoder like "nvenc"

a. Hybrid already supports this on Linux
b. don't see any gain in it compared to NVEncC

In this case it will be possible to skip "vspipe" providing to Hybrid a more robust alternative in case of "unknown" problems with filters.

In my eyes, ffmpegs Vapoursynth support is not more stable than vspipe.
=> not planning to support directly loading the a vapoursynth script through ffmpeg

Cu Selur