I've been tackling a stubborn video from a VHS-C camcorder and the interlacing is sending me in circles. Normally I leave things interlaced and handle that at playback, but that has with glaring combing on the edges here.
That leads me to cleaning it up in avisynth with QTGMC, but when I do and leave it at doubled frame rate, it seems to introduce (or maybe just accentuate?) jitter in the capture. It's noticeable on playback, but also when you progress through frame by frame in virtualdub
When I selecteven() the output, it doesn't seem to have that effect, although I do get some ghosting on the edges.
Attached are three samples to illustrate. One as captured, one with QTGMC at 59.97, and another with QTGMC at 29.97. They are in need of levels and color work, but I turned all that off to isolate QTGMC for the moment. Just using basic qtgmc(preset="faster") nothing fancy.
Is there something I'm missing with QTGMC, or should I be tackling this another way in avisynth? Is this an error in the underlying capture that's just being accentuated by the deinterlacing?