That scene is setting off tfm's combed frame detection. If you use tfm(display=true,pp=1) you can see that it is being set off by the upper story window of the leftmost house (the block tfm draws is hard to see since it is behind the text). Possible solutions are to increase cthresh or increase MI so that the combed frame detection isn't triggered. Another option is to use a script that wont artifact as much on false positives, such as: mpeg2source("dvd.d2v") interp = nnedi(field=-2) deint = tdeint(mode=2,edeint=interp) tfm(d2v="dvd.d2v",clip2=deint,slow=2) tdecimate(mode=1,denoise=true) The downside is that in the case of true interlaced frames mode 2 of tdeint will output a blended frame (since no two frames in the bobbed stream will match), but personally I'd rather live with that.