Interpolating missing field, which is the best way?

Try either Sangnom ( ) or TDeint ( ). Edit : but if you want t o watch it on an interlaced display, you should keep it interlaced.

your method equals to: Code:

Ahhh i see, i never had the idea to turn motioncompensation off. I will check that! hanfrunz

please do not mix up motion compensation with motion checking.

hm.. this may be the issue, you are receiving with all avisynth-internal resizers: they seem to change all lines on size doubling to maintain the correct spatial position of the frames. so, forget about that 1st method I described above. try the other three ones, to see, how they do perform for your needs.