dvd decrypter + telecine

orbisvicis · Post by **orbisvicis** » Sat Jun 28, 2008 10:16 pm

the vobs on the dvd are 24/1.001 fps (reported by DGIndex). They're also encrypted so they get really blocky, but still its 24 fps. I assume there are 3:2 pulldown flags as well on the dvd.

When I rip a pgc with DVD Decrypter, i combine the result into one large .M2V and enable stream processing to demux the audio. According to DGIndex, the resultant file now is at 29.97 fps. Furthermore, 2 out of 5 frames are interlaced (in VDub).`

So, why does DVD Decrypter follow the 3:2 pulldown and telecine my 24 fps content? It really bugging me, b/c the the "forced film" option in DGIndex doesnt do a good job at inverse telecine, and there's no need to do IVTC in avisynth when i have perfectly good 24fps material anyway.

Scott Green · Post by **Scott Green** » Thu Jul 03, 2008 8:38 am

first of all a dvd has either
25 fps (PAL) or
29.97 fps (NTSC)
it's a standard and i think no DVD has 24 fps anywhere. Even if they make a 3:2 pulldown if they make a DVD they have to convert it to those standards.
Assuming DGIndex shows you that your vobs have 29.97, you probably have a NTSC DVD.
DVD Decrypter does absulutely nothing to the .vob files. It simply copies the .vobs from the DVD to your HDD.
DGIndex also does no deinterlacing or whatever filtering you think it does.
You have to do the deinterlacing, telecide, filtering, etc with avisynth on the .d2v file dgindex creates.
thus your vobs remain as they are on the DVD (unfiltered, interlaced, 25 or 29.97 fps) till you stream them through the d2v file and avisynth (depends on what your avs script looks like)

badmartialarts · Post by **badmartialarts** » Sat Jul 05, 2008 12:20 am

Hmm, I've seen DVDs that claim to be 24 fps progressive footage in DGIndex but are quite obviously not once you take a look at them. I'm not sure if they were just misflagged or what. They tend to have some of the most horrible interlacing patterns too, sounds like you got lucky if it's a nice repeating pattern. One of the fancier deinterlacers, like the TIVTC package, can actually search your .d2v file and compare it to the .vob to find misflagged areas and fix them.