Writing an AVS script, progressive DVD?

[ks32561]

I've been using Gordian Knot to rip dvd's to xvid format, I haven't had any problems yet. But one of my DVD's are in Progressive format and the tutorial I am following doesn't clearly discuss this format. I'm at the stage of writting the avs script file to be used by virtualdubmod. Here is an excerpt from the tutorial

If the video is telecined, replace the first # symbol with the line Telecide(order=1,guide=1).Decimate()
If the video is interlaced, replace the second # symbol with the line FieldDeinterlace()
Leave the other # symbol in.
If the video is neither interlaced nor telecined, you can leave both # symbols in.

Now the disc is NTSC Progressive 29.97fps, I used DGIndex to force film the dvd to 23.976fps. The tutorial requested I do this if the FILM precentage was equal or higher than 90% in DGIndex. My question is this. Looking at the quote above, is my DVD telecined, interlaced, or neither? Sorry if this has been asked before, I haven't seen the answer.[/b]

[manono]

Hi-

Are you sure it's NTSC Progressive 29.97fps? I'm not doubting you, but that's pretty rare.

If it's true, then you'll have 0% Film, and you don't use Force Film as that'll make it 23.976fps, and it will play jerky because you're knocking out 20% of the frames. You set it up for Honor Pulldown Flags and keep it at 29.97fps and don't use Telecide/Decimate or FieldDeinterlace at all. It hasn't been telecined and it's not interlaced.

The answer is neither.

[ks32561]

Here are some screen shots so you can judge for your self. I had video on "Honor Pulldown Flags" when I took the screen shots. Also, the Disc has NTSC logo on the front.



Another thing I just noticed. Every few mins while I preview the film it will jump to video instead of film. Any idea? Screen shot below

[manono]

So why did you say it was NTSC Progressive? It's 98% Film Progressive if those shots are from the end. To find the real final figure, open the D2V in Notepad, scroll to the bottom, and read what it says.

There are 2 ways to use NTSC, and the way you used it (what it says on the DVD case) doesn't have a whole lot to do with its meaning in DGIndex.

Anyway, it's usually safe with 98% Film to use Force Film and then not to IVTC or deinterlace. There are no guarantees that you won't get a few interlaced frames unless it's 100% Film. This doc is a bit out of date, but the information in it is still good:

http://www.doom9.org/ivtc-tut.htm

This one may also give you some good information:

http://forum.doom9.org/showthread.php?t=87809

Another thing I just noticed. Every few mins while I preview the film it will jump to video instead of film. Any idea?

Yes, often that means a chapter change (the Vob Cell ID will change at the same time), and it also means that it's dropping to video for a few frames. It's at those places that you may or may not get a frame or 2 of interlacing after using Force Film.