Telecined or Interlaced? (IVTC Trouble) AviSynth

[expo_]

Hi, so I've been working to IVTC some ntsc dvd rips from the early 2000s and I'm having trouble with some of the video tracks.

This is the video I want to IVTC (MakeMKV): https://drive.google.com/file/d/1wjsTRyR9lF9EF4CTD_HLYFwNll0QyMpZ/view?usp=sharing

and this is the script I have been using. I have tried changing the cthresh and pp, which helped slightly but intermittent scanlines are still present after all is done.

LWLibavVideoSource("AcceleRacers CCG Promo.mkv")
assumeTFF()
tfm().tdecimate()
crop(10, 56, -12, -56)

Output Example: https://drive.google.com/file/d/1amzigMX9aAWUgLZnu9r7Sh77zHXHlm8k/view?usp=sharing

I checked the original video and it appears to have scanlines when there is motion. I couldn't note any pattern, but the large majority of frames have scanlines, usually only separated by one progressive frame.

What is the best course to take here? Any help will be very appreciated. Thanks!

I should also note that some of the video tracks from the NTSC DVD (29.97FPS) are restored well using that inverse telecine script, and on a different note, some of the tracks from the PAL versions (25FPS) which I think shouldn't have telecining still appear to have scanline type stuff.

[davexnet]

Try srestore for 25 fps

lwlibavvideosource("C:\Users\davex\Downloads\AcceleRacers CCG Promo.mkv")
bwdif(field=3)
srestore()
return last

[expo_]

thanks, that seems to have done it. I am noticing some dot crawl/grid pattern though. Any remedy for this?
[Attachment 75608 - Click to enlarge]

[Sharc]

Dotcrawl can be hard to remove without damaging the picture. Better to avoid it by capturing via S-Video rather than composite.

You may try Avisynth's dotcrawl filters.

Or this one has proven to be quite effective for NTSC sources
http://web.archive.org/web/20180505194328/http:/home.earthlink.net:80/~tacosalad/video/dotcrawl.html

[expo_]

Thanks, I'll check that filter out.

Tbh, I fear the source is already so low in quality (360p) and contains so many tiny details that are already on the brink of being blurred beyond recognition after IVTC that I may just chalk this one up to being unrecoverable.