Avisynth: Interlaced sources guide? [See pg2]
I find this topic a very confusing one! When it comes to interlaced sources and MA scripts, it just seems like there are too many suggestions floating around. I hope by asking these questions someone could make a "definitive" sticky for dealing with interlaced sources.
- Boulder has a thread MA script for interlaced sources, but for the life of me I just can't get it to work. I guess I am too used to Moviestacker. He mentions stuff like mod4, mod2, and height/2, and despite my best efforts to try that out I can't for the life of me get his script to work. - Incredible has the thread Interlaced / Progressive ... and what it means: which deals with deinterlacing sources. - So does Kwag in the stickyConverts 60fps Video into 24fps, but then Incredible makes some suggestions - and finally, what about Kwag's latest MA optimal script? My problem with Boulder's MA script for interlaced sources is I simply cannot get it to work as it is. So I combined Incredible's deinterlacing with Kwag's MA script but the encoding right now is sllllloooowwwww. I'm sorry if I have asked similar questions in the past, but I still feel in the dark on this! I hope someone can shed some light on this issue for me. Thanks |
I think the same. And maybe a taslation to spanish language.
:D |
I really hope someone can help me. I'm trying to encode a DVD of the movie "Camp". DVD2AVI reports that it is NTSC and interlaced, I do see combing during high action scenes when I preview with DVD2AVI. But I'm so confused by
a) which script should I be using? Kwag's MA optimal? b) How should I treat this interlaced material? Telicide/Decimate? Bob? Smoothdeinterlace? convert60ito24p? or the multitude of OTHER deinterlacing means? Despite all the guides out there I still have no way of telling whether my source is "true" interlaced or not, and what the implications of that are. And what about IVTC? Basically if my source isn't Film I am 100% confused about what to do! |
Well, if your source is 29.970fps interlaced you have some alternatives:
1- Encode it as Interlaced and keep the 29.970fps. In this case you can use Boulder's script 2- Deinterlace it and keep the 29.970fps. In this case you just use a deinterlacer, like TomsMoComp, FieldDeinterlace, Telecide (without Decimate) and others. You have to choose the one you prefer. After that you can use the MA script. 3- Deinterlace and change to 23.976fps. In this case you can use the convert60ito24p script and than use the MA script. I have not tested the convert60ito24p script, so I don't know if the results are good. But if they are... I would certainly choose the third alternative. |
After a long day of experimenting, here are my results. I tried using convert60ito24p on my film but the results were horrible, with either Bob or SmoothDeinterlace. During camera panning scenes I could definately see where the interlaced fields have been combined (I believe the term is ghosting?). I had the best results using telecide() and decimate(). I'm not certain why you said not to use decimate, but with it my encode was converted to 23.976fps. I then enabled 2:3 pulldown in DVD-lab as I'm making KDVDs. Oh, and I am then using the MA script.
The results so far have been fantastic. I'm encoding with CCE at Q=15, min/max = 64/4500. This compressed a 6 Gb movie down to around 2.5 Gb with really no noticeble difference. In fact the source was rather grainy with noise, and the MA script seemed to do a good job of smoothing the film out. |
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I've done some movies exact like you describe. Many friends didn't notice the problem at all. But some noticed, and I almost have headaches watching a 2 hours movie like this. |
convert60ito24p script must *ONLY* be used on a 100% interlaced source :!:
-kwag |
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I just wish there would be a simple and easy way to figure out what to do with Interlaced material. For progressive film material, the criteria are so clear cut. Just check out doom9.org |
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I asked this elsewhere, but didn't get a clear response.
If I use my DV cam to capture from VHS, will the new "source" be 100% interlaced regardless of the original source? |
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You'll get your capture at 29.97fps which you should Inverse Telecine for best quality. So you have to find out if your capture's original material is FILM or interlaced. -kwag |
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So my suggestion is .... if "real" interlaced source is present: - you can deinterlace but you also then should bring it to 23.976 (60iTo24p function) - to keep the quality you can encode directly as interlaced but in case of even 29.97 this means a veeeery lot avg bitrate needed ;-) |
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HI J-Wo
This is no solution because i am in the same boat as you i have no idea ,i go to doom9 and search the title of the movie and sometimes you can get clues what people did to get it to work. |
This version of the MA script should work well with interlaced sources:
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## DLL Section ## |
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can a castaway up a board?...thanks. now we need a navy.... more will come ! :wink: |
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The more the merrier :D |
Jorel your link to http://www.doom9.org/ivtc-tut.htm was extremely helpful! I suggest a sticky should be put up either linking to that article or some bold person do a summerization of it, incorporating changes as needed to suit KVCD/KDVDs.
It did a REALLY good job of explaining whether your source is 100% 29.97 interlaced or 23.976 telecined to 29.97. Turns out my source was the latter, so a simple IVTC (inverse telecine) worked. That page provides some excellent avs samples to check your source. For example, load your source with Code:
LoadPlugin("mpeg2dec.dll") I ended up making a script with the following IVTC lines: Code:
Telecide(Guide=1,Post=False) Anyway admitadly this topic is much more complicated than I first imagined, but with the help of this forum I'm learning more day by day! |
oh yes J-Wo, a long time i posted this :
http://www.kvcd.net/forum/viewtopic.php?t=5664 that have links to that page and some more. i read it thousands..... i know that this page is amazing but my poor english don't help me... Boulder a few months, send me good explanations but it still confuse to me. in the end of the tutorial is wroten: "CONCLUSION The subject is not an easy one if you’re just learning it for the first time. It will take practice and experimentation to gain a better understanding of the concepts and methods involved. But we hope this tutorial will help some of you. " then i'm out of the "some of you" in the phrase.... i really need a "how to" for stups....like: "do this" if.....and "do that" if don't... :oops: |
Jorel: I think I'll start working on just such a guide! It'll be really simple with straight forward steps, not getting into any complicated scenarios but hopefully will be enough for most users. I'll post a reply to this thread later, let me know what you think!
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