de-interlacing

[gsharad007]

the question is wat is the best method of de-interlacing those badly interlaced movies.

i ususally use avisynth doubleweave/pulldown combo but it isnt working on these files. i am using TomsMoComp but still i get lots of ghost frames. wat i did was use doubleweave then TomsMoComp and then selectodd/selecteven. though there was considerable decrease in ghosting it is still there and now it takes alomost double the time.

wat other methods do u think wud give me better results. (quality is a priority)

[scharfis_brain]

1) which video standard are you working with? PAL / NTSC?
2) is your video a standards converted one?
3) was it originally FILM (24fps)
4) try restore24

[gsharad007]

Originally posted by scharfis_brain
1) which video standard are you working with? PAL / NTSC?
2) is your video a standards converted one?
3) was it originally FILM (24fps)
4) try restore24

i am in india but usually i get NTSC material
second question i dont understand
no dvd2avi show ntsc
restore24 is plugin to avisynth???

[ChronoCross]

@gsharad007

what he means by #3 is that was it originally film material or was it just straight telecined material. #4 is a AVS function that can be found by doing a search on Restore24.

@scharfis_brain

Please clarify #2. even I don't know what that means.

[Mug Funky]

NTSC and PAL are both standards.

therefore "standards conversion" is converting 1 standard to another one :)

so if for example an NTSC DVD came off a PAL master (25fps progressive). it would have been changed to 29.97fps interlaced, and the individual fields would have been blended together, causing the ghosting.

the most commonly seen standards conversion is the NTSC->PAL one, but they basically all give the same result - watchable on an interlaced TV, terrible on anything else.

to check for it, use this script:

mpeg2source("blah.d2v")

assumeTFF() # DVD is TFF by convention, but can be made BFF

bob()


step through the frames in VirtualDub, and if you see stuttering motion change assumetff to assumebff. if you see blended frames (well, actually fields because we're working with bobbed output) then you've most probably got a standards converted movie, in which case Restore24 can help you.

there's another possibility though: analog telecine. these look rather similar to standards converted videos, but the field-blends will vary in opacity from top to bottom of the picture (like peculiarblend in avisynth). this is caused by a particular type of telecine that was popular right up until digital telecine took over - it uses internal reflection in a spinning prism (synchronized with the film source) to mix different frame rates together. this is what causes the top-to-bottom field blending. in these cases, restore24 might also help you.

[Boulder]

Sorry for entering the thread with my own question, but what is the correct way to get back to truly interlaced 25fps PAL (the original material) from an interlaced 29.97fps NTSC source. Is RePAL the way to go or are there other possibilities?

[scharfis_brain]

currently, it is NOT possible, to recreate 50i out of a 50i to 60i converted video.
(it is mathematically possible, but it is hard to set up in AVISYnth...)

only 25p -> 60i will be recoverable.

[gsharad007]

[scharfis_brain] i am not sure about perfect reconstructions but using doubleweave/pulldown combination u can get back the most accurate (my opinion) movie.


also back to my question all the threads on restore 24 are long and confusing.

wat u say is it wud be better than tomsMoComp ???

my movie is Matrix 2 NTSC 29.976fps. (badly interlaced is my opinion)

[Boulder]

I think you should create the d2v project with Force FILM enabled.

[Mug Funky]

that's not badly interlaced at all! that's telecine.

use a field matcher, or Force FILM if it's not hard-telecined (that is encoded as 29.97 rather than 23.976 with repeat-field flags in the stream, which are what DVD2AVI reads as "film")

[gsharad007]

force film doesnt seem to fix it.


a field matcher ???

[Boulder]

Field matcher = Telecide() for example.

Download the latest Decomb package (v5.2.1 IIRC) and read the documents. They contain a good tutorial for doing the IVTC which is probably the answer to your problem.