IVTC DVD9 To DVD5

oso2k6 · 21st July 2008, 08:01

Hi, how are you, i would like to know if it is recommended to ivtc a dvd when converting dvd9 to dvd5, or is this necessary only when ripping dvds to avi? Because there are a lot of R1 NTSC dvds of chinese and japanese movies that are hard telecined. I assume my movie is hard telecined because when loading the vob with virtualdubmod i have 3 progressive frames and 2 interlaced frames, is always the same pattern. Tried decomb option in rebuilder and that worked but i didn't like the final result, lost some detail, then i tried with Telecide(guide=1).Decimate() and i liked the result but i had synch problems (maybe caused by the removed dupe frame. Correct me if i'm wrong please), movie was playing too fast, then i tried TFM().TDecimate() and had the same synch problems.
How should i configure those filters to correctly remove the hard telecine without causing synch problems?

Thanks in advance

I uploaded a sample made with dgindex

http://uploaded.to/?id=teugjz

http://www.filefactory.com/file/2b61..._1_demuxed_m2v

manono · 21st July 2008, 10:05

Quote:

How should i configure those filters to correctly remove the hard telecine without causing synch problems?

You can't, not within DVD-Rebuilder, as it doesn't support IVTC or any other kind of framerate change. If you wish to IVTC, encode manually. You seem to be knowledgeable enough so it shouldn't be a big deal for you.

setarip_old · 21st July 2008, 18:21

@oso2k6

Hi!

Quote:

i would like to know if it is recommended to ivtc a dvd when converting dvd9 to dvd5

No, not if the original DVD(9) plays properly for you...

steptoe · 21st July 2008, 19:49

This is a very complex subject as it seems to be an issue with Anime mainly, but try these links

http://www.animemusicvideos.org/guid...ech/video2.htm
http://www.animemusicvideos.org/guid...h/avsivtc.html

Or these filters that 'might' be what you are looking for

http://avisynth.org.ru/docs/english/...ers/uncomb.htm
http://avisynth.org.ru/docs/english/...ters/tivtc.htm

Forgot about this one, try this function that is very specifically for Anime and various telecine that is used in Anime DVDs, but 24FPS only

http://forum.doom9.org/showthread.php?t=138305

manono · 22nd July 2008, 04:47

Quote:

Originally Posted by setarip_old

@oso2k6

Hi!No, not if the original DVD(9) plays properly for you...

Boy, do I ever disagree with that. You'll get a huge quality boost when compressing to DVD5 size by IVTCing and encoding as progressive 23.976fps as opposed to keeping it interlaced 29.97fps. You just can't use DVD-RB for the job. In addition, many progressive scan DVD players (such as the popular Philips DVP-642 and other flag reading players) will only deinterlace the video, rather than performing an "IVTC", when outputting to a progressive display such as an HDTV. Just try a hard telecined DVD in PowerDVD on your computer and step through the frames to see what I'm talking about.

steptoe, I don't think these are anime he's talking about, and he seems to know how to IVTC already. It's not an issue confined to anime. As he says, many HK and Japanese (and other country) NTSC DVDs are hard telecined.

czerro · 30th July 2008, 06:02

If no amount of IVTC+blend technique will work, the best option I have found in that situation is to perform a high grade bob through avisynth (mvbob,mcbob) and subtract every other frame with a SelectEven() or SelectOdd(). This simply returns you to your original framerate but subtracts the hard interlacing. You can then try to decimate the frames to 23.976 and perform some sort of temporal blending the remove the choppiness (mvtools contains a flowfps function that I believe works in some sort of similar manner). This is obviously a suboptimal solution, BUT looks better than the source.

turbojet · 2nd June 2009, 20:31

Sorry to revive an old thread but thought it would be better then making a new one.

But is there any plans to add a manually set IVTC function in DVD-RB using tivtc and the d2v function of tdecimate or decomb would do too?
Well hidden of course, maybe accessible only through the new segment viewer / editor along with blank, slideshow, no reencode options, also could these options be showing on a VTS level as well?

21st July 2008, 08:01	#1 \| Link
oso2k6 Registered User Join Date: Feb 2006 Posts: 14	IVTC DVD9 To DVD5 Hi, how are you, i would like to know if it is recommended to ivtc a dvd when converting dvd9 to dvd5, or is this necessary only when ripping dvds to avi? Because there are a lot of R1 NTSC dvds of chinese and japanese movies that are hard telecined. I assume my movie is hard telecined because when loading the vob with virtualdubmod i have 3 progressive frames and 2 interlaced frames, is always the same pattern. Tried decomb option in rebuilder and that worked but i didn't like the final result, lost some detail, then i tried with Telecide(guide=1).Decimate() and i liked the result but i had synch problems (maybe caused by the removed dupe frame. Correct me if i'm wrong please), movie was playing too fast, then i tried TFM().TDecimate() and had the same synch problems. How should i configure those filters to correctly remove the hard telecine without causing synch problems? Thanks in advance I uploaded a sample made with dgindex http://uploaded.to/?id=teugjz http://www.filefactory.com/file/2b61..._1_demuxed_m2v

21st July 2008, 19:49	#4 \| Link
steptoe Registered User Join Date: Mar 2003 Location: UK Posts: 360	This is a very complex subject as it seems to be an issue with Anime mainly, but try these links http://www.animemusicvideos.org/guid...ech/video2.htm http://www.animemusicvideos.org/guid...h/avsivtc.html Or these filters that 'might' be what you are looking for http://avisynth.org.ru/docs/english/...ers/uncomb.htm http://avisynth.org.ru/docs/english/...ters/tivtc.htm Forgot about this one, try this function that is very specifically for Anime and various telecine that is used in Anime DVDs, but 24FPS only http://forum.doom9.org/showthread.php?t=138305 Last edited by steptoe; 21st July 2008 at 21:20.

30th July 2008, 06:02	#6 \| Link
czerro Registered User Join Date: Feb 2008 Posts: 31	If no amount of IVTC+blend technique will work, the best option I have found in that situation is to perform a high grade bob through avisynth (mvbob,mcbob) and subtract every other frame with a SelectEven() or SelectOdd(). This simply returns you to your original framerate but subtracts the hard interlacing. You can then try to decimate the frames to 23.976 and perform some sort of temporal blending the remove the choppiness (mvtools contains a flowfps function that I believe works in some sort of similar manner). This is obviously a suboptimal solution, BUT looks better than the source.

2nd June 2009, 20:31	#7 \| Link
turbojet Registered User Join Date: May 2008 Posts: 1,615	Sorry to revive an old thread but thought it would be better then making a new one. But is there any plans to add a manually set IVTC function in DVD-RB using tivtc and the d2v function of tdecimate or decomb would do too? Well hidden of course, maybe accessible only through the new segment viewer / editor along with blank, slideshow, no reencode options, also could these options be showing on a VTS level as well?