question about VOB file structure on DVD

[jimdagys]

I made a DVD with 4 titles using Gui For DVD Author. When I open the VIDEO_TS folder with Media Player Classic I see the following. (See screenshot 1)
However, I have another DVD that I bought which is also 4 titles and the same length and with a 10 second introduction clip, but when I open the VIDEO_TS folder in Media Player Classic, (see screenshot 2) there are many fewer files. It seems to me that both DVDs ( since both are 4 titles and same length) should have about the same number of files. Can someone tell me why the file structure is so different between seemingly similar DVDs? Which file structure is more standard?

[DB83]

They are both standard dvds.

It's just the way the authoring process has handled the VTS's.

I authoured a dvd with some 25 titles. But it still only had 1 VTS

[Baldrick]

The first one has multiple vts(video title set), if you for example have video clips in different resolutions or with different audio you must use multi vts but if you all your clips are in same they can be stored in one vts. See http://www.digitalfaq.com/dvdguides/authorburn/intro.htm

[guns1inger]

You are confusing titles with titlesets. A title is a single movie. a Video TitleSet, or VTS, is a collection of titles that all share common features. For multiple titles to co-exist in a single VTS they must share the same resolution, aspect ratio, framerate and audio formats.

[AlanHK]

The first has four different titles.

The second has a single title. Probably it has a menu with chapter entries for each part.
It probably will play continuously through all parts (chapters).

Both should total about the same size though. the *_0.VOB and *.IFO files should be pretty small.

Looking at each disk with tools like DVDShrink or PGCEdit would let you know for sure.

[guns1inger]

The first has four different titles.

The second has a single title. Probably it has a menu with chapter entries for each part.
It probably will play continuously through all parts (chapters).

Looking at each disk with tools like DVDShrink or PGCEdit would let you know for sure.

You cannot tell from a file list how many titles it has, only titlsets. A single titleset can have many titles in it, but all you will see from Windows Explorer is a single VOB set. I have created many discs with a single titleset (for simplicity) and multiple titles. It is bread and butter stuff.

[Alex_ander]

Guns1inger is right, you can't tell by file structure how many titles a VTS has and in which order they are played. A very illustrative way of exploration a complicated DVD structure is opening it in DVDRemake, it shows in DVD tree how each VTS is organized inside, how its PGC's are grouped in same or different titles, etc.

[AlanHK]

You cannot tell from a file list how many titles it has, only titlsets. A single titleset can have many titles in it, but all you will see from Windows Explorer is a single VOB set. I have created many discs with a single titleset (for simplicity) and multiple titles. It is bread and butter stuff.

OK. I know that GfD does make a new titleset for each title, I assumed this was the general rule.

Anyway, the various tools mentioned (DVDShrink, PGCEdit, DVDRemake, etc) will tell you explicitly what titles are in which VOB.