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View Full Version : Get VTS sectors: IFOEDIT VS IFOUPDATE


U977
9th March 2004, 12:40
Hi all,

Some of you may have read my subtitle problem. In short, when I author a DVD using IFOEDIT, I'm not able to select the subtitles stream I want to play if I play it with PowerDVD.

So, I got that idea: use DVDShrink to strip unwanted audio and subtitles streams (reauthor mode on main movie only, no compression). The IFO files I get would be very similar to the ones I get if I reauthor my audio and video files using IFOEDIT.
I thought that I would just need to use IFOUPDATE to get needed data from IFOEDIT authored IFO files, and import them into my DVDShrink IFO files.
In addition, I had to check the subtitles ratio value and subtitles colors using IFOEDIT.

It worked once already, for the first movie I tried that on. The result could be played fine both on PowerDVD and standalone players. ANd IU could select all of my subtitles streams.

However, this time, using exactly the same method, my resulting IFO files are refused by Nero.
Tests on IFOs obtained from DVDShrhink: subtitles are working 100% fine, as expected.
Tests on IFOs obtained from IFOEDIT: I can't select the subtitles stream in PowerDVD (but it works with the IFOEDIT DVD player).

By real luck, and I don't know how anymore, IFOUPDATE finally gave me a working file (accepted by Nero, and playing subtitles fien in PowerDVD) after some play with IFOUPDATE and IFOEDIT. Everything is fine when playing it on PowerDVD (so I'm about to burn and check on a standalone).
However, if I use IFOEDIT to do a "Get VST sectors" on the main movie IFO, several items get corrected, but the result is refused by Nero (version 6.3).
Yet, right before, as I used IFOUPDATE and its "automatically get VTS sectors", it was already done. So IFOEDIT shouldn't have found something else, I think.

Hence I wonder: is there a difference in the "Get VTS sectors" of IFOEDIT and IFOUPDATE?
Can I trust my working IFO file, since using IFOEDIT and its Get VTS sectors will render the movie unburnable?

As a matter of a fact, I noticed those:
The layerbreak of the original movie will be "compiled" by DVDShrink as a cell without an associated program.
But if I extract celltimes from the original movie, and use them for authoring with IFOEDIT, the layerbreak will be "compiled" as a cell with an associated program.

Hence, I have problems with IFOupdates, and I needed to manually remove the layerbreak in celltimes.txt, so that I have the same number of programs in IFOs from IFOEDIT and DVDShrink. But the resulting authored files do not have the same number of cells.
Hence only "standard method" is working in IFOUPDATE. Anyway, that's the one I needed, according to my first successful attempt on another movie.

That makes a long post... But I'm in quest for explanations on what happens, or more details on how the tools work.

I can also mention that I tried Rejig authoring (latest version, 0.5e I think), and the resulting files are crashing PowerDVD when I try to play them. Rejig produces two VOB file sets (VTS_01_xx and VTS_02_xx), while DVDShrink and IFOEDIT produces only one VOB files set.

I think I have to learn a lot from those attempts, but as I did not manage to get anything working yet, except by luck (and I don't trust the result, since I did not do anything special to get this working IFO file). In addtiotion, IFOEDIT finds thinsg to correct in it, as I said.

This is why I'm looking for help so that I learn what can be learned from those attempts.

Using IFOEDIT to watch at the IFO files, I don't find anything that could cause the problem.

U977
9th March 2004, 12:59
I noticed that IFOEDIT corrected things in VIDEO_TS.IFO too, when I press "Get VTS sectors". I feel that this may be the event that renders the movie unburnable in Nero.

I really feel lost. I thought that a kind of "autostart" IFO was simple enough to allow me to use my idea.

Or if I could find the difference about subtitles between IFO files from DVDShrink and IFOEDIT...

violao
9th March 2004, 15:52
Originally posted by U977
... I'm not able to select the subtitles stream I want to play if I play it with PowerDVD.


Did you mean to say that you couldn't select subtitle through DVD menu button command while you play it with PowerDVD or through PowerDVD's internal subtitle selection (right click on video, choose subtitle...)?

U977
9th March 2004, 16:19
Violao,

In answer to your question, I meaned by right click on the video, and then choose subtitle.

Btw, a search revealed another topic about "Get VTS sectors": IFOEDIT VS IFOUPDATE. It seems that several of us noticed a difference.

Keywords: VTS IFOEDIT IFOUPDATE.

violao
9th March 2004, 16:40
Originally posted by violao
Did you mean to say that you couldn't select subtitle through DVD menu button command ...

OK, I see now that you even don't have menus (from your last post).

1. Follow Doom9 guide for Subtitle stripping with IfoEdit and it should work fine, unless you have a very special case where there is a "hole" in subtitle streams between your interesting subtitles in original IFO. By hole I mean that certain subpicture stream is not present/defined in IFO file. If that is the case you first need to remap interesting subtitle streams in IfoEdit to consecutive stream numbers starting from 1 and only then you can strip streams. Final IFO will have exactly those subtitles that you have selected mapped to 1, 2, 3... and your software player will be satisfied.

2. DVDShrink to my knowledge does not remap streams, so in this case you will have to remap them to 1, 2, 3 after stripping.

In any case you need to have subtitles of your choice with consecutive stream numbers 1, 2, 3, ... defined in IFO file.

BTW, don't simply delete menu VOB files. This will definitely confuse Nero and probably players too. Replace them with blank vobs instead.

U977
9th March 2004, 16:54
Violao,

I actually started the whole thing another way:
I demuxed all audio and subtitle streams, re-encoded the VIDEO (smaller size, of course), and now my last step was to author the new content.

Well, I'll proceed another way, I think: use the whole output of IFOEDIT, and feed DVDShrink with it (reauthor maode) in hopes that it will produces a new IFO file working with PowerDVD.

U977
10th March 2004, 13:19
Hello again,

I don't have an answer for the difference between IFOUPDATE and IFOEDIT.
But I found a solution for my subtitles, if interested (should someone arrive here because of a search):
http://forum.doom9.org/showthread.php?s=&threadid=72416

violao
10th March 2004, 16:18
Originally posted by U977
...Well, I'll proceed another way, I think: use the whole output of IFOEDIT, and feed DVDShrink with it (reauthor maode) in hopes that it will produces a new IFO file working with PowerDVD.

After IfoEdit stripping I normally use Backup Mode of DVDShrink, since it preserves IFO files. Therefore if you test your DVD in IfoEdit prior to transcoding, it should work the same way afterwards.