Miixed NTSC/Film in a single VOBID - How?

[HyperYagami]

Hi,

I have this problem and wonder if anyone has a solution.

I have a anime movie where the 1st VOB is like a mixed kind, where the company logo and such (like the first 20 seconds or so) are NTSC, but once the file starts it switches to FILM. I didn't even know that is possible. How do I defeat this? Another thing is that because of that the duration of the audio and video aren't the same anymore, which makes the movie totally out of sync.

Thanks!

[r6d2]

Hi, HyperYagami.

What you describe is not unusual and in fact is very frequent. Please read this tutorial, you will find plenty of info on this matter:

http://www.doom9.org/ivtc-tut.htm

Hope this helps.

[HyperYagami]

thx for the reply.

however, I'm looking for the info regarding how to convert the cce generated .m2v file back into mixed mode, since pulldown makes the whole thing 29.97. also, what is the relationship between dvd2avi (.d2v), avisynth (.avs) and docce4u? because of this, all the chapter points are wrong since the timestamps are wrong, however since I fed docce4u the correct i-frame values i shouldn't need to reencode the whole .m2v am i right?

or am I missing something in the guide? thx!

[r6d2]

Sorry. I don't get your point.

What you tipically want is to have it all in film mode (24fps), not with mixed frame rates! Keeping it on 30 fps is not good either: you waste 20% bitrate on the encoding.

If you have an hybrid source (which I'm not sure it is the case) as the tutorial says, there is no perfect solution. However, it is possible that most of the source may be reverse-pulldowned (or IVTCed).

If that is what you want, that tutorial will show you how to detect if that is possible and how to do it. A properly IVTCed movie will have audio in sync, subtitles in sync, and chapters in sync.

If that is not what you want, I don't know how to help you.

Also, since you don't seem to be familiar with avisynth and its relationship to DVD2AVI, you may find useful to visit www.avisynth.org. Search for IVTC there, and also read "Section 2: AviSynth and frameserving".

Do your homework! :D

Regards,

[HyperYagami]

Originally posted by r6d2
What you tipically want is to have it all in film mode (24fps)

Thx. I'm starting to know what you're talking about.

Originally posted by r6d2
A properly IVTCed movie will have audio in sync, subtitles in sync, and chapters in sync.

Correct me if I'm wrong, but I thought once you IVTC'd the 29.97 part you don't get same the # of frames anymore as the frames are removed? As the result, the i-frame points for DoCCE4U are not right as well.

[r6d2]

Originally posted by HyperYagami
Correct me if I'm wrong, but I thought once you IVTC'd the 29.97 part you don't get same the # of frames anymore as the frames are removed? As the result, the i-frame points for DoCCE4U are not right as well.
(Just to clarify: the fact that DVD2AVI alternates between "Film" and "NTSC" does not mean that the fps is mixed on the source. It's all in 30fps. What DVD2AVI tells you when labeling a section as "film" is that it can reverse the Telecine with no much work. But it's still at 30fps.)

If you force-film (or if you IVTC), you will get 24 fps, which is what you want. And yes, the extra frames are removed. And the chapter entry points are fixed.

I know it's hard to believe, but the guys who wrote all these pieces of software are really good.

Your qualification for this assignment: C+. Keep the good work :D