[HELP] How to convert video to higher bit depth before running certain filter

[Selur]

You can enable "Filtering->Vapoursynth->Misc->UI->Show 'Gimmick'-controls", this will show additional controls next to most of the filters.

There you can set 'Restrict bit depth' to a bit depth.
Hybrid will then convert to the selected bit depth before applying the filter.
Assuming the filter you apply does not support the bit depth, Hybrid will convert down to a bit depth the filter does support.
Any denoising, degrain and similar filter that does smooth in some way or another can lead to banding when using low bit depth precision.
Note that, if your output is 8bit the output might still contain banding, even if your whole chain beforehand is in i.e. 32bit, unless you add debanding/dithering/noise to the video. Simply due to the calculation precision and what banding is and how happens.
see: https://en.wikipedia.org/wiki/Colour_banding

I try to insert the following script to Vapoursynth - custom - Insert before [smdegrain]:

clip = core.resize.Point(clip, format=vs.YUV420P16)

unless you let Hybrid know that you changed the color format (see tool-tip of 'Insert before'), this can cause issues in itself.

Cu Selur