How to Deinterlace?

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truerachel
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How to Deinterlace?

Post by truerachel » Thu Apr 01, 2004 7:14 pm

Ok, I've made most of my video in premiere...but does anyone know how I deinterlace the dvd footage? Does Premiere have a built in deinterlacer? Should I deinterlace it?

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SS5_Majin_Bebi
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Re: How to Deinterlace?

Post by SS5_Majin_Bebi » Thu Apr 01, 2004 7:25 pm

truerachel wrote:Ok, I've made most of my video in premiere...but does anyone know how I deinterlace the dvd footage? Does Premiere have a built in deinterlacer? Should I deinterlace it?
Read <a href=http://www.a-m-v.org/guides/avtech31/>ErMaC & AbsoluteDestiny's Friendly AMV Guides</a>

truerachel
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Post by truerachel » Thu Apr 01, 2004 7:29 pm

Oh, so I can just run decomb afterwards? Cool. Thanks.

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Post by mckeed » Thu Apr 01, 2004 7:40 pm

you can, but you won't get as good results. You should have done it beforehand.
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SS5_Majin_Bebi
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Post by SS5_Majin_Bebi » Thu Apr 01, 2004 8:06 pm

mckeed wrote:you can, but you won't get as good results. You should have done it beforehand.
Thats not true. As long as she doesnt resize before deinterlacing, and as long as she doesnt change the framerate or field order, it doesnt matter whether its before or after.

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Zarxrax
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Post by Zarxrax » Thu Apr 01, 2004 8:14 pm

It does actually.
After yu edit the video, you have essentially completely screwed any sort of pattern that may have existed in the telecine, making it much harder for decomb to do a proper job on it. And if you do stuff like flashing effects or frame by frame editing like lip sync, then there can be parts that are totally unable to be IVTCed properly.
Also I think doing effects or motion could screw up the stuff too, but I'm not really sure.

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Post by trythil » Thu Apr 01, 2004 8:20 pm

truerachel wrote: Oh, so I can just run decomb afterwards? Cool. Thanks.
Is your DVD interlaced or telecined?

NTSC telecined video streams usually follow a pattern that looks something like

... non-combed non-combed combed combed non-combed ...

whereas interlaced video looks like

... combed combed combed combed combed ...

If your video looks like case #1, then Telecide *beforehand* is the best option. If it looks like case #2, you can use Decomb's FieldDeinterlace function to do deinterlacing (before or after) and it'll probably look just fine, but you might get better results with other deinterlacing filters such as KernelDeint [0]. Give them a try.

SS5_Majin_Bebi wrote:
mckeed wrote:you can, but you won't get as good results. You should have done it beforehand.
Thats not true. As long as she doesnt resize before deinterlacing, and as long as she doesnt change the framerate or field order, it doesnt matter whether its before or after.
If the footage is telecined, it does make a difference.

Deinterlacing NTSC telecined footage will produce progressive frames, but it also creates duplicate frames. In some cases this isn't noticable, but with things like pans and zooms it is very obvious.



[0] Quick warning: this can make things look pretty good, but it requires that your source be in the same field order the whole way. The easiest way to ensure this is to put KernelDeint in the AVISynth script that you load into your editing program, although with some stuff even this doesn't work all the time.

truerachel
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Post by truerachel » Thu Apr 01, 2004 8:32 pm

trythil wrote:
Is your DVD interlaced or telecined?
It's ripped Kenshin DVD footage, so I assume interlaced...It looks interlaced anyway.

I have done flashing effects and one quick zoom. And of course, being anime, there are panning shots...but I've already edited so much together that I think I'll just take my chances de-interlacing afterwards. It probably won't turn out that horribly.

Thanks, though.

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Post by Eek-1 » Thu Apr 01, 2004 10:19 pm

Preview the DVD through DVD2AVI.

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SS5_Majin_Bebi
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Post by SS5_Majin_Bebi » Thu Apr 01, 2004 11:34 pm

ek1 wrote:Preview the DVD through DVD2AVI.
Ignore that advice. That wont remove the interlacing.

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