[MPlayer-dev-eng] [PATCH] vf_crop to pass on field-order

[Zoltan Hidvegi]

The following patch passes on the mpi->fields information to any
filter after crop, which shold allow you to use softpulldown or pullup
after cropping.  It inverts the field-parity if odd number of lines
are cut from the top, but the interlacing could still be messed up if
chroma is half-height, since you can end-up with top-field-first in
chroma but bottom-field-first in luma.

Zoli
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