Topic: Has anyone used dvda-author to extract wav files back from a dvda disc?

[Digital Quality]

Hi, I used the dvd-audiofile program to create a dvda disc and now I'd like to get the wav files back out. There is an option for this in the dvda-author program (which dvd-audiofile uses under the hood to make the disc file) but I got an error.

     [ERR] Cannot open ATS_01_4.AOB

I looked on the disc and indeed there only exists AOB files 1-3. It extracted pieces of the 1st and last file but the rest are just headers. I used the windows version 09.05 of dvda-author program to try this extraction.

Thanks.


Edit to add log file. It looks to be working but then it goes back and tries to extract a second time for some reason and clobbers the files.

Code: [Select]

 

dvda-author.exe --extract e:\,1 -o c:\recordings\wsp



[WAR]  Could not open settings file, creating one...

------------------------------------------------------------

============================================================

 -----------------   DVD-A author 09.05   -----------------

Current time is: 26 Jul, 22h 33m 54s
============================================================
Copyright Dave Chapman 2005-Fabrice Nicol 2007-2009
<fabnicol@users.sourceforge.net>-Lee and Tim Feldkamp 2008
This file is part of dvda-author.
dvda-author is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
dvda-author is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with dvda-author.  If not, see http://www.gnu.org/licenses/.


------------------------------------------------------------
[PAR]  Output directory is: c:\recordings\wsp
[INF]  Extracting audio from e:\/AUDIO_TS
[MSG]  Output directory 'c:\recordings\wsp/g1' already created

[INF]  Extracting c:\recordings\wsp/g1/track02.wav
       96000Hz, 24 bits/sample, 2 channels - 61278720 samples
[INF]  Extracting c:\recordings\wsp/g1/track03.wav
       96000Hz, 24 bits/sample, 2 channels - 48291840 samples
[INF]  Extracting c:\recordings\wsp/g1/track04.wav
       96000Hz, 24 bits/sample, 2 channels - 46629120 samples
[INF]  Extracting c:\recordings\wsp/g1/track05.wav
       96000Hz, 24 bits/sample, 2 channels - 56853760 samples
[INF]  Extracting c:\recordings\wsp/g1/track02.wav
       96000Hz, 24 bits/sample, 2 channels - 61278720 samples
[INF]  Extracting c:\recordings\wsp/g1/track03.wav
       96000Hz, 24 bits/sample, 2 channels - 48291840 samples
[INF]  Extracting c:\recordings\wsp/g1/track04.wav
       96000Hz, 24 bits/sample, 2 channels - 46629120 samples
[INF]  Extracting c:\recordings\wsp/g1/track05.wav
       96000Hz, 24 bits/sample, 2 channels - 56853760 samples
[INF]  Extracting c:\recordings\wsp/g1/track06.wav
       96000Hz, 24 bits/sample, 2 channels - 31754240 samples
[INF]  Extracting c:\recordings\wsp/g1/track07.wav
       96000Hz, 24 bits/sample, 2 channels - 34812160 samples
[INF]  Extracting c:\recordings\wsp/g1/track08.wav
       96000Hz, 24 bits/sample, 2 channels - 60082270 samples
[INF]  Extracting c:\recordings\wsp/g1/track09.wav
       96000Hz, 24 bits/sample, 2 channels - 21768960 samples
[INF]  Extracting c:\recordings\wsp/g1/track02.wav
       96000Hz, 24 bits/sample, 2 channels - 61278720 samples
[INF]  Extracting c:\recordings\wsp/g1/track03.wav
       96000Hz, 24 bits/sample, 2 channels - 48291840 samples
[INF]  Extracting c:\recordings\wsp/g1/track04.wav
       96000Hz, 24 bits/sample, 2 channels - 46629120 samples
[INF]  Extracting c:\recordings\wsp/g1/track05.wav
       96000Hz, 24 bits/sample, 2 channels - 56853760 samples
[INF]  Extracting c:\recordings\wsp/g1/track06.wav
       96000Hz, 24 bits/sample, 2 channels - 31754240 samples
[INF]  Extracting c:\recordings\wsp/g1/track07.wav
       96000Hz, 24 bits/sample, 2 channels - 34812160 samples
[INF]  Extracting c:\recordings\wsp/g1/track08.wav
       96000Hz, 24 bits/sample, 2 channels - 60082270 samples
[INF]  Extracting c:\recordings\wsp/g1/track09.wav
       96000Hz, 24 bits/sample, 2 channels - 21768960 samples
[ERR]  Cannot open ATS_01_4.AOB



[Digital Quality]

Update: I got this working, with a bit of finagling. Essentially, there seems to be a bug in the dvda-author program with regard to extracting from multiple AOB files (the files that contain the actual audio data on a dvda disc). I got around the problem with these steps.

• Create a copy of the disc with only the 1st AOB file present. I used a flash card but you can probably use any dir.
• Extract the data from your new copy using the normal dvda-author extract options (dvda-author.exe -x <input> -o <output>)
• Save all but the last file extracted to a safe place.
• Copy the last file to new name so it won't get overwritten.  Realize that the last file in an AOB stream is probably split across multiple AOBs.
• Copy the 2nd AOB file to your new disc and rerun dvda-author extraction.
• Concatenate the 2 parts of the wav that's split across AOB streams.
• Repeat from "Save all but the last file" step until you've exhausted the AOB streams.

This isn't the ideal situation but if there is a problem with your "backup" data it can be recovered from your dvda disc.

I've sent a note to Fabrice but haven't heard anything back yet.  Maybe there is a better way to handle this or some special switch that will help but I think I've tried everything.

[libfab]

Hi,
I've got your report in late July and having a look at it now I'm back home for a few days.
Fabrice

[libfab]

Could you please redo your test (with original disc) using: --extract e:
instead of --extract e:\,1 then report?
Thanks.
Fab

[libfab]

Issue is fixed in source code, downloadable from usual location (http://dvd-audio.sourceforge.net) as file dvda-author-09.05-10.tar.bz2
Normally this direct link should work: https://sourceforge.net/projects/dvd-audio/files/dvda-author/dvda-author-09.05%20src/dvda-author-09.05-10.tar.bz2/download
A Windows binary will be uploaded this Saturday.
Fab

[bgalizio]

I don't know anything about using terminal, but would also like to do this... could you post a dummies version of how to extract the audio from a DVD-A disc?

[libfab]

Once I've upgraded the files, (let's say over the week-end) you'll be able to extract without the above bug using my graphical user interface. You can already extract nicely for dvda-author/DVD-Audiofile made discs, using the currently available packages, if your data is such that no audio group has more than 1GB of data.

The how-to for the dvda-author interface is here:
http://dvd-audio.sourceforge.net/GUI.shtml.
Use the "Decode" icon as indicated.

Download the package under dvda-author-package > dvda-author-package-09.05 win32 for windows from here:
http://sourceforge.net/projects/dvd-audio/files/.

Note: This is not to compete with DVD-Audiofile, which is a nice front-end, it's just that the extraction feature has not been integrated in it.

Otherwise, you can use a possibly illegal application (at least in some countries) called DVD-A Explorer. There's no institutional site to download but you'll find a discussion here
http://www.hydrogenaudio.org/forums/index.php?showtopic=61928

DVD-A Explorer is a bit slower than dvda-author --extract but it extracts MLP tracks and "encrypted/protected" tracks, which dvda-author does not, being on a strictly legal path.

Fab

[bgalizio]

Thanks for the help! Now, how do I change MLP files to WAV?

[libfab]

There is an extensive discussion here:

http://avisynth.org/mediawiki/DVDAGuide#Decrypting_DVD-Audio

Please note that DVD Fab violates the FFMPEG project licensing policy, and that DVD-A Explorer may be illegal in some countries for some features, as said above, as well as other decrypting tools mentioned on the above page.

[bgalizio]

Gotcha. I thought all of our homemade DVD-A discs from DVD-Audiofile/etc. used this MLP format. Sounds like that's only the commercial discs, so I won't need to convert it!

[libfab]

Yes, actually MLP is only useful for 96kHz multichannel. It is a proprietary lossless compression format, akin to FLAC 'below the hood'. So, if you need compression, just flac the files to DVD-ROM, otherwise straight wav format is good enough for disc authoring.

[libfab]

The bug mentioned in this thread was fixed and new builds uploaded to the sourceforge file release system (packages are under dvda-author > dvda-author-09.05 win32 and dvda-author-package > dvda-author-package-09.02), here: http://sourceforge.net/projects/dvd-audio/files/

BTW, new development is under way, with release builds expected in Sept, to accommadate the following new features:

- so-called "gapless" titles (either by anti-gap strategies or by merging consecutive tracks into a bigger one, when possible)
- top-level menus, with menu subtitles (still-image menus with sound and hopefully, animated video menus).

Fab