CatBus said:
I thought crappy old 4:3 letterboxed DVDs would be hard-telecined, but maybe they just have the pulldown flag just like modern DVDs... I'll try the whole process without deinterlacing/interlacing, but still using the interpolated scale, and report back.
Even if the video is 29.97 fps hard-telecined, performing IVTC is the correct solution, it should never be deinterlaced.