What should be an simple Interlaced Question

[BlueFlame]

Hello
I read the guides, and have no problems with non Interlaced films. They also come out 700mb every time. Good job doom & WEF.:)

I have been getting some Interlaced DVDs, but cannot get them to come out smooth, and they come out around 130mb smaller then the 700mb I set it for.
I hope if I give you the DVD2AVI preview readings, it should be easy for someone to provide straight forward settings.
I would greatly apresheate someons help that is knowledgeable about Interlaced films.

Ok, running DVD2AVI preview with Field Operation set to none, I get this:

Aspect Ratio: 16:9
Frame Rate: 29.970fps
Video Type: NTSC
Frame Type: Interlaced
It also shows the real smAll horizonal blame lines.

With that info, is it just a matter of choosing the same settings every time?

Settings:
1-What do I set the Field Operations to when I "Save Project"?
2-In the "Save & Encode" panel what do I choose in the "Field Operation" section? Fast? Field?
3-Do I run that setting in my 5% Compressability Check?
4-And put a check mark in the "IVTC in avs -> correct Frame Count" box, correct?

I thank anyone that can tell me the steps with the info I provided above. Thank you.
:)

[manono]

Hi-

Lots of questions. What DVD2AVI is telling you isn't enough to determine what kind of material you have. But in this case you definitely need to use No Field Operation when making the .d2v. You should read hakko504's Sticky (http://forum.doom9.org/showthread.php?s=&threadid=23776) on the subject so you can learn more. Down at the bottom of it it says that based on what DVD2AVI tells you, you may have either a pure interlaced source, or an IVTCable source. To determine which, open the .d2v in GKnot. Scroll to a place with movement, and then advance frame by frame. If every frame is interlaced, then it is pure interlace, and then you can only deinterlace using either FieldDeinterlace, or Fast Deinterlace (choice is up to you-I prefer FieldDeinterlace). If you see interlacing in 2 of every 5 frames, then it can be IVTC'd. So you'll tick the IVTC button when setting up your .avs. Just deinterlacing will keep it at 29.97fps, whereas IVTCing will reduce the frame rate to it's original 23.976fps.

As for the compress test. With pure interlace deinterlaced material, read the resulting percentage with 29.97fps. If IVTCing, read the resulting percentage at 23.976fps.

If IVTCing, yes, put the check mark in the "Correct Frame Count" box. If only deinterlacing, then don't check the box. I suspect you came out undersized (and probably missed the last part of the movie) because you checked the box and didn't actually use IVTC.

Come back if you have more questions. Or, you could actually do a little searching for the guides or the many threads on the subject.:)

[aramo]

Hi BlueFlame,

I've had good results dealing with interlace issues by totally avoiding any settings in gknot and using the decomb.dll filter.

There is no; afaik; 'one fix does all' but - and it took me a long time to figure this out - you can do an instant spot check by opening the movie.avs file created by gknot in vdub.

Links to decomb.dll are on doom9s link section.

Three quick tips after installiong decomb.dll:
Frame with must be multiple of 4
Using facourite text editor edit movie.avs file and add line for decomb.dll near the top and a line for Telecide() just before sustitles line
If you want to deinterlace credits you'll have to edit the credits.avs as well as the movie.avs [sometimes I forget]

When adding to gknot queue tell gknot not to process immediately - then use text editor on avs file - then open vdub/nandub and tell that program to open the avs file - step thru file to see if current settings take care of interlace problem - you may need to add decimate() etc see the decomb-help file. Processing a short clip is usually a good idea.

e.g.
#
# Created with Gordian Knot
#
# http://thewef.nav.to
#
# PLUGINS
# get them from http://users.win.be/dividee
LoadPlugin("C:\PROGRA~1\GORDIA~1\mpeg2dec.dll")
LoadPlugin("C:\PROGRA~1\GORDIA~1\decomb.dll")
# SOURCE
mpeg2source("D:\dvd301\casino\casino_43tele127.d2v")
#
# TRIM
trim(0,247539)
#
# IVTC
#InverseTelecine(40,10,15)
# or use
#GreedyHMA(1,0,4,0,0,0,0,0)
#
# CROPPING
crop(24,126,672,320)
#
# DEINTERLACING
#SmartDeinterlace(2,15,true,true,true)
# or use
#VerticalReduceBy2
# or maybe
#GreedyHMA(1,0,0,0,0,0,0,0)
Telecide(guide=2)
#
# SUBTITLES
#VobSub("FileName")

etc etc

[BlueFlame]

WOW manono...that had to be the best reply I have ever got, really. Normaly I would have got, "I would use Field", and that's all.
Thanks for your help. :)

Ps: I have been reading up on this. Not all previous posts or guides click whin I read them. ;)

[manono]

Hi BlueFlame-

Thanks-I appreciate it. I hope it helps you in your hobby. Posts, even the best written ones, often don't "click" if you're unfamiliar with what's going on. It took me about a year or so before I finally understood most of the Interlace-IVTC puzzle, and there are still some areas that absolutely baffle me. Good Luck.