Fake video_ts.vob??

[influenza]

I've run into this interesting problem:

On the lion King DVD there's a video_ts.vob of about 650 MB. Rather Big so I wanted to make it smaller. I used numenu for that.

The encoding using numenu took forever so I decided to take a closer look.

The demuxing of the video_ts.vob resulted in 14 cells of about 50 MB.

Reencoding those cells resulted in interesting things: cce reports the m2vs as being 30007 frames. Since it's Pal that would mean the clip is 20 minutes. I would like to know how to put 20 minutes of dvd video into 50 MB ;)

I thought at first it was a flaw in numenu so after consulting Zeul I demuxed the original video_ts.vob from the dvd manually with dvddecryptor and then ran dvd2avi manually. This resulted in the same result: a rather big d2v file (about 80 Kb, normally for a file like this maybe 4 KB).

So I openend the m2v files (demuxed from the video_ts.vob). All they are is 20 minutes of nothing!

So it seems the video_ts.vob is completely fake, only there to use sspace. The video_ts.vob doesn't seem to be called from anywhere either. So I deleted the video_ts.vob and replaced it by a small one.
Result: dvd just plays ok.

SO it seems to be there to just bother us, if so it's pretty cleverly done. Although pretty easily circumvented in this case.

[coona]

Really nice and interesting analysis :).

[idbirch2]

Does the extra 650MB included in the video_ts.vob push the size of the disc over 4.37GB? If so they must have done this to prevent casual copying. If not, why did they do this?

[influenza]

It doesn't push the dvd as whole over it (it's more than 8GB totally). But maybe movie + video_ts.vob is more than 4,37 don't know should check that.

[influenza]

Just a small update:

simply using the video_ts.vob caused the navigation to mess up. Simple changing the foisrt play pgc wasn't an option either. SO I just decided to strip all vobids from the video_ts.vob except the first one.

Lost more than 600 MB and everything plays flawlessly now ;)

[D3s7]

Ran into somewhat the same thing my self recently....

400mg VIDEO_TS.VOB file that after running through NuMenu it resulted in a 14mg file... puzzled I did a little looking and found that it was the FBI warning + Rating then rest was just a black screen.....

Must be new efforts to stop the clueless from DVD duping

[influenza]

Problem with this one is that if you run in through numenu you have to wait a very long time :( It's 14 vobids of 20 minutes! So that's about 5 hours of video (although just black) to encode, this takes forever (imagine doing a 2 or 3 pass)

[whaqatac]

Disney seem to have tried to be clever with this DVD on region 2. On top of the VIDEO_TS.VOB being full of 20 minute blank VOB-ids, they have also added two twenty minutes blank PGC's in VTS05 worth about 100mb.

I found that if you look at the menu from VTS20 in IFOEDIT you can remove the hebrew menu option and this reduces the file from 759mb to 402mb and the DVD plays fine. If you choose the hebrew option at the startup screen when you play the DVD it just jumps straight to the English menu. You can then run it through NuMenu4U if you need to compress it further.

By stripping the VIDEO_TS and the hebrew menu option, plus removing the Disney trailers and the blank PGC's from VTS05 you can save over 1.3GB of space with no loss of any options.

[influenza]

Ah I didn't notice this in vts5, but I think I didn't reencode that vtsset.

I didn't have a hebrew menu. (Dutch and English) and decided to keep both. Unfortunately numenu doesn't seem to like this menu so I used dvdshrink to compress it a couple of hundred MBs because it was really too big. All together I saved about 1 GB I think and It all came out quite nicely.

[dcking]

just tried this before using dvdshrink and im getting a error when i open files in it

---------------------------
DVD Shrink 3.0
---------------------------
DVD Shrink encountered an error and cannot continue.
The error is:

Failed to open file

The reason is: Unknown
---------------------------
OK
---------------------------

any ideas on what could be going wrong?

[D3s7]

Well for one your posting a DVD Shrink question in the DIF forum...