Two (PCGs) of same movie in One VTS?

[recoil47]

Has anyone seen this, and how can I fix it? I am trying to make a backup of Die Hard 1 (yes, still. I had other things come up and am trying to do this again)

I think I have my previous problem licked, but when I started messing with the customer bitrate settings in Scenaid as was suggested, I noticed that my MAIN bitrate was a lousy 1.4. Of the roughly 8GB ISO all but 100MB of it is in the main VTS. Looking closer I noticed there were 2 PCGs of the movie itself. There was a small difference....one version of the movie was approximately one minute longer than the other. Other than that, they were the same. Both were widescreen versions.

So it occured to me, that if I somehow elimimated one of those, my bitrate would be a much better. Two questions come to mind regarding doing this. Can someone answer?

1) Why would they build 2 almost identical copies of the same movie into one dual layer DVD? Whats the point? 1min extra isnt exactly an "extended edition"

2) How can I "strip out" or remove one of those versions to get a better bitrate for the final product?

Thanks!

[influenza]

Could you post the ifo sturcture? Usually you just demux by vobid and you won't have the problem, unless both pgcs have different vobids offcourse.

Before I can give any sound advice I would like to see the layout of the ifo.

[FreaQ]

I think he is talking aubout the Special Edition of DH1.
The movie has seamless branching with one scene which was not finished and so it is in black/white (s.th. with the FBI cutting off the power)
So I think demuxing by VobID will resolve the problem.

[influenza]

Yeah I believe a vobid demux is the way to go, but without the ifo structure I can't tell.

[recoil47]

How can I post the IFO structure for you to review? Not sure how that's done.

Also, if by Demuxing by VOBID you meant unchecking one of the PCGs in DIF4U, then thats what I did last night...and it appeared to work. From what I can tell it only demuxed the PCG I still had checked, and the other one wasnt re-encoded and part of the final result.

[FreaQ]

No. You mark your VTS and check on the left side in dif4u demux by: VobID
This will help you. Or the Guides on the main page.

[recoil47]

Ahhh I see what you are talking about. Odd thing is, all I did was uncheck the particular PCG that I didn't want and it seemed to work OK. Here is a screenshot of my DIF4U before hitting the "Do It" button.

Can you explain why this worked?

http://www.thepeacemakers.com/images/dif4u.jpg

[influenza]

unchecking the pgc makes scenaid dummy it. You haven't reproduced the structure this way though. You could have done a vobid demux, which would have kept both pgc and would have lowered the bitrate only very slightly. Because the extra vobid is very small.

[recoil47]

So in the future when something like this comes up, the better way to do it (to get the highest bitrate and best quality) is to check all of the PCGs in the VTS instead of doing what I did. Then check the demux by VOBID button, and run the program, then run Scenaid?

So my way let Scenaid make a dummy of that second large PCG. But it did not keep the original structure of the DVD intact.

The VOBID Demux will also remove the second PCG, but keep the structure intact?

Question: If I do the VOBID Demux, what do I do so Scenaid doesn't encore both PCGs (how do I remove the one I dont want).

Thanks

[influenza]

Well you need a little lesson in dvd structure ;).

The pgcs contain cells and the cells make up vobids. Those vobids can be shared throughout different pgcs. so let's assume the movie is vobid1 and the little extra part is vobid2.

now pgc1 will contain vobid1 and pgc2 will contain pgc1 and pgc2. SO this does not mean that much more space is required, because pgc1 and pgc2 simply share vobid1. So the only extra thing is that little vobid2.

When you demux by vobid you'll get a vobid1 (once) and a vobid2. Both will be encoded and muxed. In your final product you'll have both pgc1 and pgc2.

What you did is only keeping pgc1, while you could have kept both and the bitrate would be a bit lower (but only slightly, irrelevant I would say).

[recoil47]

I think I see what you are saying. So the first time around, when I had both PCGs checked with default DIF4U settings, what I did was make two complete demuxes of the movie, one the original, the other having that added scene, which is why the file size was so big.

By doing it the way you suggest, it uses only that extra scene for the second PCG instead of the entire thing, and keeps its structure intact.

Is that more or less it?

[influenza]

yup ;)

[recoil47]

Awesome.

Thanks for your help as well as the explainations. Everytime I run into an issue I usually learn something new like this. :)

[[SLiM]D12]

off topic, but i just watched this last weekend for the first time.......great flick.......