Just for clarity, NTSC DVD is always CRF after pulldown -- 29.97 (30000/1001) fps as digital frames, 59.94 (60000/1001) fields per second as interlaced analog output. But the underlying frame rate before soft pulldown can vary anywhere from 19.98 (20000/1001) and 29.97 (30000/1001) fps.
And any DVD can be a mix of true interlaced frames at 29.97 fps, hard pulldown (ie pulldown before being digitized at 29.97 fps), and soft pulldown (progressive frames with flags that tell the player how to produce 29.97 fps interlaced frames from the progressive frame rate).
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Sorry for the lack of responses, ended up busy, but I did get some experimentation and investigations in between. Turns out me using FFmpeg to handle the pull-down removal was the issue. When examining the video frames, there were scenes that ended up having duplicate frames inserted, as well as leaving behind combed frames still. As such, the end result ended up coming out to being 24.000 FPS instead of 23.976 FPS. I used TFM and TDecimate in tandem with the D2V made by DGIndex (using the VOB videos instead of the MKV), and that seemed to do the trick. I'm thinking FFmpeg works fine so long as the material has proper pull-down handling and such, but the moment you end up with a source that isn't as simple, it freaks out a bit. I'm not sure what to adjust to fix that issue exactly, but it is what it is, point is I got the second film worked out in 23.976 FPS without any messed up frames. Thanks for the advice guys and gals.
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