Will IVTC work on a clip after it has been deinterlaced?

[LisaB]

I have a 29.97 clip that has the telltale 5-frame pattern of telecining....except that it has already been deinterlaced, so the once interlaced frames are now blurry progressive frames.

I would like to IVTC so I could encode at 23.976....but can even a good IVTC filter, like Decomb, work with fields that have already been blurred? How well do its field matching algorithms work in cases like this?

[borghe]

Decomb will work perfectly. Just skip the telecide() portion and just use decimate(cycle=5).

[SLK001]

DECOMB will do a good job, BUT you will still have to use TELECIDE and DECIMATE. Just use the POST=TRUE to do some blending of your "blends". I run across one of these occassionally, and this is what I do. My source is animation, and it turns out pretty good.