Sangtian with sangnom

[Selur]

Sangtian with sangnom

elif type == 'sangnom':
            if dh:
                cshift = -0.25
                if c.format.color_family != vs.GRAY:
                    cshift = [cshift, cshift * (1 << c.format.subsampling_h)]
                c = Resize(c, w, h * 2, sy=cshift, dmode=1)
            return c.sangnom.SangNom(order=field, aa=aa)

gives

SangNom: the _FieldBased frame property must be either 1 (bottom field first) or 2 (top field first) when order is 0 (double rate output). Did you forget to invoke DoubleWeave before SangNom?

works fine when using SangNomMod (https://github.com/HomeOfVapourSynthEvolution/VapourSynth-SangNomMod which is YUVP8/Y8 only.
-> so either:
a. the sangnom option should be removed, or
b. SandNomMod should be used in the script, or
c. That script part needs to be changed to properly use 'Sangnom'