Am So., 19. Apr. 2020 um 16:31 Uhr schrieb pdr0 <p...@shaw.ca>:
>
> Carl Eugen Hoyos-2 wrote
> > Am 19.04.2020 um 08:08 schrieb pdr0

> >> Other types of typical single rate deinterlacing (such as yadif) will
> >> force you to choose the top or bottom field
> >
> > As already explained: This is not true.
>
> How so?  Assuming you're actually applying it (all frames), or deint=1
> and the frame is marked as interlaced in ffmpeg parlance:
>
> If you use mode=0  (single rate), either it auto selects the parity, or
> you explicitly set it top or bottom

Yes, but this does not imply (in any way) "choose the top or bottom field".

> If you use mode =1 (double rate) , it's a non issue because both
> fields are retained

The (visually horrible) issue of wrong parity is especially noticeable
for double rate.

Carl Eugen
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