Problems with IVTC [Archive]

humax

15th December 2007, 05:17

Hi
I have a Problem with IVTC . I have a DVD Source with 29.97 fps . After IVTC it has 23.97 fps . But i want that it has 29,97 fps . Whats my fault ? DgIndex says that the source is interlaced with 29.97 fps .

thx for help.

Script :
# Created with Gordian Knot
#
# http://gknot.doom9.org

# PLUGINS
LoadPlugin("H:\GORDIA~1\DGMPGDec\DGDecode.dll")
LoadPlugin("Y:\Tools\decomb521.dll")

# SOURCE
mpeg2source("Y:\test2.d2v", idct=0)

# TRIM
#trim(startframe,endframe)

# IVTC
# or use
#IVTC(44,11,95)
#GreedyHMA(1,0,4,0,0,0,0,0)
Telecide(order=1,guide=1).Decimate()

# CROPPING
crop(4,4,712,476)

# DENOISING: choose one combination (or none)

# RESIZING
BicubicResize(640,352,0,0.5)

setarip_old

15th December 2007, 05:41

Hi!I have a Problem with IVTC . I have a DVD Source with 29.97 fps . After IVTC it has 23.97 fps . But i want that it has 29,97 fps . Whats my fault ? DgIndex says that the source is interlaced with 29.97 fps .I am not a user of AVISynth but, you might try simply applying a deinterlace filter INSTEAD of performing IVTC...

Guest

15th December 2007, 06:09

DGIndex never says that the content is interlaced. It only tells you how the frames are encoded. Often progressive content is encoded as interlaced. You have to inspect the video to find out.

If it is truly interlaced, then you shouldn't apply IVTC, and you should deinterlace as setarip_old suggested, if you need progressive output.

If it is telecined progressive, and for some reason you want 29.97fps, you can use a field matcher like Telecide() and omit any decimation.

hartford

15th December 2007, 06:11

Hi
I have a Problem with IVTC . I have a DVD Source with 29.97 fps . After IVTC it has 23.97 fps . But i want that it has 29,97 fps . Whats my fault ?

IVTC gives the film rate of 23.97. Do a pulldown to get it back to 29.97 fps. DGPulldown will do this for you.

(only posted if you don't know what setarip_old and neruron2 make sense to you :)) Just kidding.

Guest

15th December 2007, 06:14

IVTC gives the film rate of 23.97. Do a pulldown to get it back to 29.97 fps. Why bother removing the pulldown with IVTC just to add it back again?

If it is to convert hard pulldown to soft pulldown, it could make sense.

I assumed he wanted progressive output, but we'll have to wait for the OP to clarify his question.