Family Channel uses 4:1 pulldown? Ughh, how do I fix this in handbrake
I noticed something strange about Family channel HD that I've never seen any other channel ever do. During shows like, "Shake it Up", they seem to be using some sort of 4:1 pulldown telecine.
The show is originally a Disney Channel show, and like all Disney Channel shows these days it's shot in 720p24. The Disney Channel in the US broadcasts in this native format. In Canada, Family Channel broadcasts in 1080i and instead of doing proper 2:3 pulldown telecine they seem to be doing some odd form of 4:1 pulldown that I've never seen before. That is, repeating every 4th frame of the original 23.976 show to bump it up to 29.97 but with no interlacing artifacts.
This is the completely WRONG way of doing a standards conversion from 720p24 to 1080i30 as it causes some very strange judder. In any case, how do I get Handbrake to deal with this? The pullup filter assumes 2:3 pulldown and it doesn't seem to work properly on episodes of "Shake it Up" recorded from Family Channel. I tried just forcing the framerate down to 23.976 during my transcode without using the pullup filter, but that seems to drop the completely wrong frames causing even worse judder. What I need is some type of 4:1 decimation filter I think.