Rounding error in motion interpolation functions

[emotion3459]

There appears to be a rounding error in the motion interpolation functions which result in a green tint on the image.

[dubhater]

Which functions exactly? And what's the input bit depth?

[emotion3459]

Minimal repro:

sup = clip.mv.Super()
bVec = sup.mv.Analyse(isb=True, delta=1)
fVec = sup.mv.Analyse(isb=False, delta=1)
interp = clip.mv.FlowInter(sup, bVec, fVec)

Affects up to the highest supported bitdepth (int16)