Confused on interlaced footage & needing help

[XXRageX1]

I've been working on video footage from both Bacano! and Serial Experiments Lain. When working with these I noticed an interlacing I didn't quite understand. Both videos are 29.97FPS, showed as interlaced on DGIndex.

What I'm seeing is a pattern of frame 4, frame 15, frame 19, frame 30 are interlaced. It also appears frames 13 & 14 along with frame 28 & 29 are the exact same frame duplicated. I'm not quite sure how this works are far as trying to deinterlace or telecine.

Taking out the interlaced frames and the duplicates I can see I'm at the 24 or 23.976 FPS. I'm guessing by main question should be, whats the best way to bring it from the 29.97 FPS to the 23.976? Also, is this a hybrid source or something else?

[mirkosp]

Sounds like you've got a telecined DVD. In this case, you have to IVTC. Add

Code: Select all

tfm(d2v="your file.d2v")
tdecimate()

to your avisynth script. Use that instead of any deinterlacing you're currently doing.
Basically, telecine presents itself with the repeated frame pattern - doin IVTC makes sure the fields get properly matched and the duplicate frame in every group of 5 gets dropped. Also, even if they were hybrid sources, you couldn't really do your AMV vfr (not without going through some hell in avisynth). Basically, for the sake of keeping stuff easy, just IVTC it all even if there were to be some full field interlaced bits.
Alternatively you could make a second script in which you full field denterlace and assumefps(23.976) and see which script looks better with the scene you need to use.

INB4 Mister Hatt rages at me for suggesting the d2v parameter of tfm instead of proper settings... <.<

[XXRageX1]

Is this type of telecined/interlaced common for the DVDs? Just finding it weird its in both series I'm starting out on. Sorry for the newbish questions.

While trying to play with that I'm getting a weird error message "d2v frame count does not match filter frame count (173973 vs 162398)! (<filepath>/<filename>, line 2)

Looking through the TFM page to see if I may need to change a parameter or something.

[mirkosp]

Telecined footage is really common on NTSC DVDs, yeah.
And well, if d2v parameter gives you error, I guess just remove the parameter and call the filter just as tfm(), it's fine.
If you see some bad matching, though, try to look at the tfm documentation and tweak the parameters to fit your source's needs best.

[XXRageX1]

Oh wow, fast reply. Yeah that did it. Removed the line and it fixed it. When comparing the original the one w/ the tfm and tdecimate it surely did fix it and VirtualDub even shows it down to the 23.97. Thanks for all the help.

Now knowing this is what telecined footage would look like, would the AMVITC in the AMV App package do the same? Also is this similar to the
Telecide()
Decimate()
That is gone over in the VicBond's?

Trying to get a betterr grasp of these as some of them seem to be for the samething but with minor differences.

[mirkosp]

AMVIVTC uses tfm+tdecimate with certain specific settings depending on the mode. You're better off using tfm and tdecimate directly and tweaking the parameters by yourself, amvivtc presets aren't even the best anyway.
Telecide+tdecimate are another way to ivtc. They are older so results tend to be worse, however if you want to manually override, they are equally fine or perhaps better, especially if you plan to use YATTA to ivtc. However, for all means and purposes of AMVs, doing IVTC with tfm+tdecimate is the easiest and best choice.