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Some advise needed on NTSC > PAL (IVTC)

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I'm doing a transfer of two NTSC LD's (Van Morrison and Blade Runner). And have found out how annoying the format is. As a complete noob on the field of NTSC, I just started working on it, without doing any research. I noticed the last two of every 5 frames had interlace problems, so I designed an AVS script to get 4 good frames out of every 5 NTSC frames:

separatefields
selectevery(10,0,1,2,3,4,5,6,9)
weave

And that worked perfectly, but only for short pieces, because apparently those groups of 5 frames aren't consistent throughout a 2 hour movie. After reading ADM's tutorial I discovered what I had been trying to do is known as IVTC. I let GordianKnot spit out an IVTC script, which comes down to:

LoadPlugin("D:\PROGRA~1\GORDIA~1\DGMPGDec\DGDecode.dll")
mpeg2source("E:\Van Morrison\s1.d2v")
Telecide(order=1,guide=1).Decimate()

And added this to make it PAL:

Lanczos4Resize(720,576)
assumefps(25,1,true)

Now, the IVTC script does a pretty good job, but there are still some frames here and there that have interlace problems. Is there a better (flawless) way to IVTC? Or is this as good as it gets?

That's no moon. It's a LaserDisc.

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How often does the field order change? Manual IVTC, using different arguments for pulldown() for each different range may be a hassle, but it may also be the only way to achieve a 100% success rate.

But if you need to do automatic IVTC, you might want to look at TDeint and EEDI2 instead of Telecide.

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Thanks a lot, TDeint works nicely. But converting a music LD from NTSC to PAL wasn't one of my brightest ideas: the helium effect is unbearable. As far as I know there is no pitch preserver that gives a decent result, and time stretching the video doesn't sound like a good idea either. So I'll leave Van Morrison in NTSC. I encoded it with CCE at 23,976 fps, 2:3 pulldown, GOP sequence: M=3, N/M=5. Burnt it to a DVD, plays good, but it looks as if there is more motion judder that on the LD itself, and when I demux the DVD with DGIndex it marks it as progressive, while I didn't select that in CCE of course. Am I missing something here, NTSC isn't supposed to be progressive right?

That's no moon. It's a LaserDisc.

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Most people who live in PAL land do not need to convert, most moderen equipment over here will quite happily play NTSC material, either in native NTSC as PAL-60.

Yes, NTSC (film) is encoded as progressive. The 23.976 (progressive) frames per second are converted to 29.97 fps by applying 3:2 (or 2:3) pulldown during playback. The pulldown is implemented by flags in the MPEG stream.

(BTW I think the GOP sequence for 23.976fps should be M=3, N/M=4.)

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I'll try N/M=4, see if that makes a difference. I got the 5 from the CCE guide at doom9. The reason I was converting to PAL is to get rid of the motion judder, it always bugs me when I'm watching a NTSC movie. But that's hardly an issue on a concert film anyway.

That's no moon. It's a LaserDisc.