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View Full Version : demuxing with "honour pull down flags" vs "forced film" means DIFFERENT m2v files ?


spectrvm
7th August 2008, 22:03
Assuming a DVD which is 100% film for sure, demuxing with "honour pull down flags" vs "forced film" means dgIndex produces DIFFERENT m2v files or; despite the selection they are the SAME and the only real changes go into the d2v file ?

I often use dgIndex to demux DVDs to be later stored on mkv files like:

mkvMerge --output movie.mkv --default-track 0:yes --vtracks 0 movie.m2v --default-track 0:yes \
--delay 0:(whatever)ms --atracks 0 movie.ac3

... where movie.m2v and movie.ac3 are the output files demuxed by dgIndex

I always used the "honour pull down flags" option meaning I have all my mkv files with 29.970fps which now I'm not sure it's OK, they should be 23.976 fps since all are films. I suppose I misunderstood this option to begin with but what done is done. (but I kept all the d2v files)

So second question is: can I fix this with the m2v/ac3 streams currently stored on my mkv files or I'm lost without ripping the original discs once again ?

Note that I don't want to re-encode anything, just keep the originals, that's why I'm not using aviSynth

Guest
7th August 2008, 23:52
The M2V files are the same in both cases. If you want to use the demuxed file and return it to film rate, you can do it with DGPulldown. You strip the pulldown flags as described in the help document. Obviously this is suitable only for a stream that is 100% normal flagged 3:2 pulldown throughout.

spectrvm
11th August 2008, 01:56
The M2V files are the same in both cases. If you want to use the demuxed file and return it to film rate, you can do it with DGPulldown. You strip the pulldown flags as described in the help document. Obviously this is suitable only for a stream that is 100% normal flagged 3:2 pulldown throughout.

Downloaded dgPullDown, stripped the pulldown flags with src=dest ... worked like a charm ... THANKS :) !

When you're saying "100% normal flagged 3:2" you mean files on which dgIndex is reporting "progressive 100% film" ?

Can I do it on progressive >= 95% film files also ?

Guest
11th August 2008, 02:37
When you're saying "100% normal flagged 3:2" you mean files on which DGIndex is reporting "progressive 100% film" ? "Throughout" means during the portions of the clip during which you might be concerned about audio sync. Ignoring pulldown flags during periods of irregular pulldown can destroy audio sync. Forced Film mode can help with that but not for demuxed M2V streams.

Can I do it on progressive >= 95% film files also ? Probably, because in such cases, it's usually the intro and credits that account for the 5% non-film. You may need an audio offset adjustment if the intro has thrown it off, however. Give it a try, what's to lose?

EDIT:

I see you're the developer, thanks for the reply to a newbie

I'm just a coder. Users are equally important, because without their valuable feedback, the program could never reach useful maturity. So, thank you!

spectrvm
12th August 2008, 07:58
"Throughout" means during the portions of the clip during which you might be concerned about audio sync. Ignoring pulldown flags during periods of irregular pulldown can destroy audio sync. Forced Film mode can help with that but not for demuxed M2V streams.

Probably, because in such cases, it's usually the intro and credits that account for the 5% non-film. You may need an audio offset adjustment if the intro has thrown it off, however. Give it a try, what's to lose?

EDIT:



I'm just a coder. Users are equally important, because without their valuable feedback, the program could never reach useful maturity. So, thank you!

crystal clear :)