How to properly separate fields

[Le Furet]

Hello all

I'm working with a PAL movie @ 25 fps, I want to properly separate fields to reach 50 fps.

The problem is there is a 1 pixel vertical shifting between odd and even frames, whein I deinterlace them. I don't find an Avisynth function that compensate this shifting.

Manao suggested me to convert to RGB, crop differently odd and even frames, and then to convert back to YV12, but I'd rather not doing this double conversion.

Any idea ?

[scharfis_brain]

this vertical shift on every other field is normal.

use bob() instead of separatefields().
If you want to get field-size, use verticalreduceby2() afterwards.

btw: no bobbing-deinterlacer known to me has a vertical shift....