Heh heh. So I thought maybe something like TDecimate might do the job. It gives the ability to open up the cycle size. Typically you decimate 1 in 5 frames. I set it to 6 in 30 to make up for the irregularity of the pattern.
No luck. So I found a clip noticeably bad and counted frames... 90 of them.
Subtracting duplicates, the frame rate was 19 fps!!!
Crazy. Maybe THAT'S why the movie hasn't been to DVD.