Need help with odd combing in seemingly telecined source

[morca007]

I'm currently working on backing up Vanishing Point (Retail NTSC) using x264, and am having some trouble.
In some scenes it looks telecined (standard 3p, 2i pattern), in others there are frames which are more combed than others, but all have residual combing (creating a pattern of 3 slightly combed frames, 2 full interlaced). However, I'm loathe to call it hybrid content as: A. It doesn't appear fully interlaced in any scenes, B. The film was made far before the advent of digital editing (effects, etc.)

I've tried IVTC and the residual combing remains (as expected), and also tried straight up deinterlacing (Yadifmod + nnedi), which just seems wrong.

DGIndex log:

Stream Type: MPEG2 Program
Profile: main@main
Frame Size: 720x480
Display Size: 720x480
Aspect Ratio: 16:9 [3]
Frame Rate: 29.970030 fps
Video Type: Film
Frame Type: 
Coding Type: 
Colorimetry: 
Frame Structure: 
Field Order: 
Coded Number: 
Playback Number: 
Frame Repeats: 
Field Repeats: 
VOB ID: 2
Cell ID: 3
Bitrate: 
Bitrate (Avg): 
Bitrate (Max): 
Audio Stream: 80: AC3 2/0 192
Audio Stream: 81: AC3 2/0 192
Audio Stream: 82: AC3 2/0 192
Audio Stream: 83: AC3 2/0 192
Audio Stream: 84: AC3 2/0 192
Timestamp: 0:09:22
Elapsed: 0:00:00
Remain: FINISH
FPS: 
Info:

Source Sample (14.7mb)

Any ideas what the combing is?
Thanks.

[Guest]

Cross-posting not allowed, per forum rule 8. Please read and follow the forum rules.

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I'm looking at your stream and will answer in the other thread.