IVTC or Deinterlace?

[DVDragon]

I've tried to read as much on this subject as I could find but I'm still having trouble applying what I've read. I think I've confused myself more than anything. I'm not sure whether to IVTC or Deinterlace. I'm trying to burn some shows to DVD that I got from my Media Center PC. I'm not quite sure which method to use. I've tried Deinterlace on a similar project and when I burned it to a DVD it looked awful on my TV. I'm not sure if I used the wrong method or if my settings just need to be altered either in my avs script or in CCE. Can someone please give me an example .avs script to use and what settings should be used in CCE for this http://webpages.charter.net/gabeg/clip.m2v ?
I think I'll understand a little better if I have an example of what I should do to this clip. I am using CCE 2.50. Thanks for any help.

[Blue_MiSfit]

Well, that clip is telecined. It's easy to tell because when you load it with a simple MPEG2Source in AviSynth, and drop that into VirtualDub, then step through it frame by frame - you see the classic 3,2 cadence pattern.

In other words, I see three frames with interlacing artifacts, and two perfect, progressive frames.

It's very obvious in scenes with high motion.

In this case, the easiest option is usually to enable force film in DGIndex. If this doesn't work, then disable force film, and add IVTC to your AviSynth script. I usually use:

#Note these filters are from the TIVTC.dll package
TFM() #Match Fields
TDecimate #Kill duplicate frames


That should return the original 23.976p frame rate :)

If it was pure interlaced video, each step in VirtualDub would exhibit combing artifacts.

~MiSfit

[neuron2]

In this case, the easiest option is usually to enable force film in DGIndex. If this doesn't work, then disable force film, and add IVTC to your AviSynth script. Preview the video in DGIndex and watch the field repeats box. If it stays at 0, then it is not soft telecined and so Force Film *cannot* be used.

I'm not thrilled with categorising video by looking frame by frame. There are some video signatures that are hard to recognize that way, but are easy to recognize when looking at the fields. So I always recommend separating the fields for diagnosis.

[DVDragon]

Thanks for the replies. So if the field repeat box stays at 0, then I would need to use IVTC? Would this be a suitable script?

Telecide(Guide=1,Post=False)
Decimate(Cycle=5)

If I wanted to run this through CCE 2.50 what settings would I need to set up in CCE? I have seen different guides suggest different settings but I'm not quite sure what to use on a project like this.

[neuron2]

Thanks for the replies. So if the field repeat box stays at 0, then I would need to use IVTC? Not quite. If you are sure that it is 3:2 telecined (by examining the fields and looking for the signature of 3:2 pulldown), *and* the field repeats box stays at 0, then you would want to perform external IVTC instead of using Force Film.

Would this be a suitable script?

Telecide(Guide=1,Post=False)
Decimate(Cycle=5)
No, because the post parameter is not a boolean.

If I wanted to run this through CCE 2.50 what settings would I need to set up in CCE? I have seen different guides suggest different settings but I'm not quite sure what to use on a project like this. Start a new thread for that; it's off-topic for this one.