Diablo II DVD and IVTC

[ChAoS Overlord]

So far I have only encoded pal DVD's this is my first NTSC one, so I should do IVTC. Unfortunately I don't know how.

What I have found out: frames are duplicated, but the interval doesn't necesarily remain the same, and it is a non-interlaced NTSC DVD. So the question is, how do I ivtc this using avisynth preferably. Has anybody done the Diablo II cinematics dvd yet?

EDIT: maybe it should be moved to the avisynth forum, sorry for this.

[Acaila]

Uhm, I didn't know there was one until I read your post :)

Sorry, can't help you with the IVTC.

[jggimi]

Chaos, you used to use GKnot. If you still do, you can determine what Inverse Telecine procedure to use from dvd2avi. You can either follow Doom9's guide, or try out my more complex procedure.

This process eliminates errors from using Force FILM on content that should be manually Inverse Telecined:[list=1] I turn Force FILM off
I use the "[" button to start a test project in the middle of the content, in a scene with motion
I then use the "]" key to make a short .d2v project ... 10 to 30 seconds long
I preview the project (F5). If it shows "FILM" without a percentage (100%), I save the project (F4) and open it in Gknot, then examine it frame-by-frame, to ensure that it is actually Telecined -- see www.doom9.org/synch.htm -- before I set Force FILM. I'll then set Force FILM and re-save the small project and examine it again, to make sure that the metadata actually removes the blended frames. Once satisfied, I re-open the .vobs to clear the "[]" buttons, save the complete project, and proceed as per Doom9's guide.
With any other setting (FILM %, or NTSC %), I save the project and use GKnot to examine it frame by frame. If it is telecined I choose one of several IVTCs -- and I use the test project and Gknot's preview .avs to see which looks better. I do the same with de-interlacing if the content is fully interlaced.
[/list=1] For manual IVTC's, I start with DeComb (which GKnot will turn on in the .avs if you select IVTC in the GUI). If I can't get acceptable results with Decomb's many Telecide/Decimate options, I'll then switch to GreedyHMA, which is built-in to the .avs but commented out. I've only switched once. :-)

For De-interlacing only, I'll use either Field or Fast de-interlace, whichever looks better, using that small test project and Gknot's preview .avs capability. In this fashion, I can see what the results will look like, without doing any encoding.

[ChAoS Overlord]

Thank you, that was very helpfull!

[ChAoS Overlord]

There is also a trailer on the dvd, it seems to be made up like this

frame 1 = frame 2
frame 3 = frame 4
frame 5 = frame 6
...

but they are interlaced, I want to add the odd and the even lines together, so that the framerate gets cut in half, and de lines get shared.

[jggimi]

I have no idea -- as I can't remember any Telecide operand the day after I've used it -- and have to continually refer to the doc. (Documentation for it is in your GKnot Docs folder.)

However, I just saw in Doom9's news today that Decomb 3.9 was announced that does more decimation of duplicate frames. Haven't tried it, of course, just saw the note. But it might help you.