Recommended deinterlacing filters for natively-interlaced content?

Can anyone recommend a/some good avisynth filter(s) for deinterlacing video that's NOT telecined from film, but was in fact created as interlaced video in the first place? In particular, badly-edited/captured video whose field order itself is mangled and volatile? Preferably, one that strives to to smart deinterlacing (using both fields in stable areas for maximum resolution, falling back to other strategies for areas that are changing/in motion)?

I'm not aware of interlacers that check the field order and see whether or not the field order changes. The 2 deinterlacers I recommend for deinterlacing true interlaced video are MVBob and MCBob. Both are very slow. MVBob is a bit faster. If you want a faster filter, Yadif is also good if your content is pretty static.

You might try TFM: LoadPlugin("TIVTC-1.0.2.dll") LoadPlugin("TDeint_1.1.dll") avisource("movie.avi") deint = tdeint(mode=2,mtnmode=3) tfm(clip2=deint,cthresh=4,mi=64,order=1) tdecimate(chroma=false) filters here: