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View Full Version : Gordin knot inverce telecine?

ilitherian
24th July 2002, 22:14
should i use inverse telecine or field deinterlace to get rid of those dang horizontal motion lines? i find that both work okay. . . does anyone have an opinion (by the way, it goes without saying that i am ripping DVD's)
Thanks
Cody
DJ Bobo
24th July 2002, 22:21
movie or anime -> IVTC (+ eventually fielddeinterlace)
other things -> fielddeinterlace alone
ilitherian
24th July 2002, 22:49
so i encode my dvd movie with IVTC, then do it AGAIN with field deinterlace?. . . ?
DJ Bobo
24th July 2002, 23:56
No, if you're using Decomb to IVTC, it uses FieldDeinterlace automatically, without telling you.

If you use the IVTC 2.2 filter, you won't have to use FieldDeinterlace if you use the settings (44,11,95) which are very effective.
On some rare cases, on DVDs like the US-DVDs of Evangelion, where a real framerate conversion was done, you may follow the ivtc line with FieldDeinterlace, because the output won't be clean anyway (FieldDeinterlace will have here the function of cleaning remaining interlaced frames)

Look into some threads in the AviSynth & DivX5 forums for more details, I don't wanna reexplain the whole thing again.

Basically, if you want a simple answer:
Movies + Anime -> IVTC
other things -> FieldDeinterlace
jggimi
26th July 2002, 19:26
There's a more accurate way. Use the preview window in DVD2AVI. Hakko504 wrote this incredibly wonderful description of what all those fields mean. Click on this! (http://forum.doom9.org/showthread.php?s=&threadid=23776)

Force FILM is an IVTC process, by the way. It just uses the mpeg2 metadata to remove the blended frames, rather than examining the frames themselves.

I find that if the FILM % IS LESS THAN 100, I need to do some checking before I turn Force FILM on. The usual cause is non-telecined leaders in front of the film itself; if that's the cause, I typically run with Force FILM. Whenver I have telecined content that can't use Force FILM, I use an IVTC process, usually DeComb.

Regardless of the mpeg2 metadata, I now always manually check, frame-by-frame, to determine if content is telecined or not, due to problems I've incountered with incorrect metadata.

For telecine details, read www.doom9.org/synch.htm, under the "35mm Film to NTSC Video Conversion" section.