Log in

View Full Version : 'Unlock' second audio stream in ifos generated by DVDlab from reauthored eps


Chetwood
15th December 2003, 09:58
I'm currently still in the process of approaching different ways to backup certain eps from my original Buffy & Angel DVDs. My most recent attempt aims at DVDlab and Ifoedit, I did it like this:


reauthor the original DVD with DVDshrink to get 4 eps with 2 audio, 2 subtitle streams each and no menus whatsoever
import those into DVDlab 1.4 beta, joining vobs of each titleset
design a simple still menu with 4 buttons each of which jumps to the corresponding ep
used ifoedit to edit the subpicture stream status to make em both visible according to 2Cool's guide 'Creating a Multi-audio and Subtitle Menus using DVD Lab'


The compiled DVD runs fine, I can select any episode from the menu BUT I do not have more than 1 audio stream to select from during playback even though the second audio stream is in the vob. I'm sure of this as the vob joined by DVDlab is of the same length as the two vobs done by DVDshrink. So there was no demultiplexing done by DVDlab.

IMO there are two possible explanations for this behavior:


As it turns out DVD Decrypter mysteriously added a third subpicture stream that's physically not there to the ifos when ripping the complete DVD in File Mode. It must be DVD Decrypter since both DVD Shrink and DVD2ONE show this additional stream and they also carry it with them during reauthoring. Result: I end up with ifos that point to a non-existing third subpicture stream.

Yet, upon playback both reauthored versions run flawlessly with two audio and two subtitle streams. When I select the third subtitle no subpicture is shown.

DVDlab either carried on this bug or messed up the ifos by itself when compiling the DVD. Cause apart from the additional subtitle stream, the video_ts file only shows one audio stream whereas the corresponding vts_01_0.ifo shows both audio streams. Plus their stream status is exactly as the one in the ifos generated by DVDshrink.


So how come the video_ts does not reference the second audio stream and what can I do to get this stream played back? In case you wanna take a look at my ifos please donwload the small zip file from my page (http://chetwood.netfirms.com/angel.htm). Thanks.

Dave82
15th December 2003, 13:26
To add an audio stream in your VIDEO_TS.IFO have a look at this thread (http://forum.doom9.org/showthread.php?s=&threadid=64555) where I answered a question similar to yours.
BTW, I suggest you to correctly specify the language for all the streams, since I saw that in your reauthored VTS_01_0.IFO both your audio streams are labeled as English (that should cause no problem, but just in case... ;))
As for the third subpicture stream that is added by DVDDecrypter, why don't you simply reauthor your DVD directly with DVD Shrink without previously copying it on your HD? Maybe it won't add anything if you just select the streams you want (even if I can't imagine why DVD Decrypter behaves like that :confused: )

Chetwood
20th December 2003, 09:32
Originally posted by Dave82
(even if I can't imagine why DVD Decrypter behaves like that :confused: )

As it turns out the original Angel DVD was badly authored so it was
referencing a 3rd subpicture stream that just wasn't there. This seems to have confused both DVDShrink and DVDlab. Once I did an additional rip
with DVD2One eliminating that stream I could use the vobs in DVDlab
and add a menu that worked.

I've also been doing some tests on my original DS9 DVDs and it seems that if there are several subtitles (> 2) and some of them only in one or so episode (say a director's comment) then DVDshrink has problems in recognizing them correctly. So later on it's always wise to check em and correct them in Ifoedit where necessary.