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

[andrewschen]

I'm just curious about how things work, experimenting.... 

BTW If put # requires colorformat YUV444P10 in custom script, the result shows

# adjusting output color from YUV444P10 to YUV420P10 for SvtAv1Model
clip = core.resize.Bicubic(clip=clip, format=vs.YUV420P10, range_in_s="limited")

If it's # requires colorformat YUV444P12:

# adjusting output color from YUV444P12 to YUV420P10 for SvtAv1Model
clip = core.resize.Bicubic(clip=clip, format=vs.YUV420P10, dither_type="error_diffusion") 

and if it's # requires colorformat YUV444P16:

# adjusting output color from YUV444P16 to YUV420P10 for SvtAv1Model
clip = core.resize.Bicubic(clip=clip, format=vs.YUV420P10)

why there's no dithering if it's 16bit->10bit? because it's already too good?