QTGMC VapourSynth bob option

[retractOffer]

Hello,
I am looking for the command line option that corresponds to the "Bob" option for QTGMC VapourSynth in Hybrid.

import havsfunc as haf
clip = haf.QTGMC(clip, Preset='Slower', TFF=True)
clip = <insert the bob option here>

[Selur]

QTGMC by default bobs so there is no additional script line for it.
Hybrid adds:

# make sure content is perceived as frame based
clip = core.std.SetFieldBased(clip, 0)
clip = clip[::2]

to only use half of the created frames, which makes it in a normal deinterlacer.

Cu Selur