Error in the extraction

[remenor]

An error occurs when trying to extract the 2nd title in this DVD-A (Alan Parsons: I Robot)

 Title  Track  Length  PTS Length  First Sector  Last Sector
    1      1    6:07    33075000             0       126878
    1      2    3:19    17955000        126879       198916
    1      3    4:06    22140000        198917       285843
    1      4    3:53    20970000        285844       369036
    1      5    4:26    23980649        369037       463065

    2      1    5:25    29250000        463066       577445
    2      2    3:31    18990000        577446       651499
    2      3    3:51    20790000        651500       733477
    2      4    3:05    16650000        733478       796768
    2      5    3:33    19253324        796769       871731

Title 1 is extracted smoothly. Passing the title 2, this error occurs:

* Extracting MLP track  2 channels  192000 Hz  24 bps
* Wrote: "./track-02-01.wav"
* Extracting MLP track  2 channels  192000 Hz  24 bps
parity mismatch
dvda2wav: src/mlp.c:476: decode_mlp_frame: Assertion `0' failed.
fish: Job 1, 'dvda2wav -A /media/060830_1400/AUDIO_TS --title 2' terminated by signal SIGABRT (Abort)

The error occurs whether the title 2 is selected, like ripping the entire DVD-A is selected.
Sorry for my english

[tuffy]

Once my own copy of that disc arrives within a few days, I will attempt to reproduce your error on my end.

[remenor]

Thank you! I just hope it's not an unrecoverable error in the ISO image ...
But I fear that it is possible.
vgtmpeg output:

encoder         : Lavf56.25.101
    Stream #0:0: Audio: flac, 192000 Hz, stereo, s32 (24 bit), 128 kb/s
    Metadata:
      encoder         : Lavc56.26.100 flac
Stream mapping:
  Stream #0:0 -> #0:0 (mlp (native) -> flac (native))

Press [q] to stop, [?] for help

[mlp @ 0xb846100] Substream 0 parity check failed.ts/s    
[mlp @ 0xb846100] Substream 0 checksum failed.
[mlp @ 0xb846100] Lossless check failed - expected ab, calculated bc.
[mlp @ 0xb846100] End of stream indicated.415.6kbits/s    
size=  655142kB time=00:16:31.17 bitrate=5414.7kbits/s    
video:0kB audio:655134kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.001235%

I'll be awaiting your results

[tuffy]

Unfortunately, I wasn't able to reproduce your error with my copy of that disc; all 10 tracks across both titles ripped correctly both using dvda2wav and the Windows-based DVDAExplorer program. Perhaps cleaning your disc or trying a different optical drive might be of some use.

$ dvda2wav -A /media/cdrom/AUDIO_TS/ -c /dev/sr1 -T 1 -d tracks3/
* Extracting MLP track  2 channels  192000 Hz  24 bps
* Wrote: "tracks3/track-01-01.wav"
* Extracting MLP track  2 channels  192000 Hz  24 bps
* Wrote: "tracks3/track-01-02.wav"
* Extracting MLP track  2 channels  192000 Hz  24 bps
* Wrote: "tracks3/track-01-03.wav"
* Extracting MLP track  2 channels  192000 Hz  24 bps
* Wrote: "tracks3/track-01-04.wav"
* Extracting MLP track  2 channels  192000 Hz  24 bps
* Wrote: "tracks3/track-01-05.wav"
$ dvda2wav -A /media/cdrom/AUDIO_TS/ -c /dev/sr1 -T 2 -d tracks3/
* Extracting MLP track  2 channels  192000 Hz  24 bps
* Wrote: "tracks3/track-02-01.wav"
* Extracting MLP track  2 channels  192000 Hz  24 bps
* Wrote: "tracks3/track-02-02.wav"
* Extracting MLP track  2 channels  192000 Hz  24 bps
* Wrote: "tracks3/track-02-03.wav"
* Extracting MLP track  2 channels  192000 Hz  24 bps
* Wrote: "tracks3/track-02-04.wav"
* Extracting MLP track  2 channels  192000 Hz  24 bps
* Wrote: "tracks3/track-02-05.wav"

[remenor]

I do understand. The downside is that I only have the ISO image at this time...
DVDAExplorer - and ffmpeg- effectively with no problems. But as reported in the log:

[32] ### MLP Stream (channels: 2, sample_rate: 192000, bits_per_sample: 24) ###
[16] Substream 0 parity check failed.
[16] Substream 0 checksum failed.
[24] Lossless check failed - expected ab, calculated bc.
[32] ### MLP Stream (channels: 2, sample_rate: 192000, bits_per_sample: 24) ###

dvda2wav may behave the same way? That is, allowing the ripping disks even with parity mismatch -reporting when they occur-?

[jeremywh7]

Fwiw, I was getting a parity mismatch error and core dump at first (on a DVD-A disc, not ISO):

[t1700@T1700 tmp]$ dvda2wav -A /run/media/t1700/SINATRASANDS/AUDIO_TS/
* Extracting MLP track  6 channels  96000 Hz  24 bps
parity mismatch
dvda2wav: src/mlp.c:476: decode_mlp_frame: Assertion `0' failed.
Aborted (core dumped)

But adding the -c device option fixed it:
[t1700@T1700 tmp]$ dvda2wav -c /dev/sr0 -T 1 -A /run/media/t1700/SINATRASANDS/AUDIO_TS

* Extracting MLP track  6 channels  96000 Hz  24 bps
* Wrote: "./track-01-01.wav"
[...]

I see this repo hasn't had an update in a long time, but if there any future improvements, I'd suggest a message for when a file name already exists (and maybe suggest an auto-appended name?) instead of:

*** Error: unable to open "./track-01-01.wav" for writing

Which initially took me a second to realize the issue, since the (zero-length) file is created when getting the parity mismatch. :-P

[brianbehlendorf]

Just to add to the last comment here, I get the same behavior - I can't rip from DVDA disks ripped as ISOs, even when mounted using "mount -o loop"; I can only rip from a physical disc, and when using the -c flag to point to the drive holding the disc. Worth updating the docs at least, but I do suspect there's a bug here worth fixing, as I am sure I'm not the only one who ripped my DVDAs to ISO hoping/expecting I'd be able to extract files from them later when I no longer had the physical discs.

[dwatteau]

FWIW, I've also needed to add the -T 0 option for the parity mismatch / decode_mlp_frame assertion to go away.

As in:

$ dvda2wav -c /dev/sr0 -T 0 -A /media/AUDIO_TS

That what for the 2007 Young Americans DVD-Audio (Bowie).

[...] I am sure I'm not the only one who ripped my DVDAs to ISO hoping/expecting I'd be able to extract files from them later when I no longer had the physical discs.

Ah, weird coincidence that we're stumbling on the same old issue in the same week 🙂

Well, since dvda2wav has some problems, I tried finding other ways of extracting this content, just in case.

I could suggest setting up a Virtual Machine with an older Windows release -- I personally used a Windows XP SP3 VM, but maybe something like a Windows 7 VM could work as well.

Then, look for the old "DVD-Audio Explorer 20080721 Beta 3" program online, and start it inside this VM, after loading your ISO or original disc through your VM settings.

Under DVD-Audio Explorer 2008, go into the File menu, and open the AUDIO_TS.IFO file that's inside of the AUDIO_TS\ directory of your DVD-Audio. Then, tell DVD-Audio Explorer to only extract the MLP files, without any conversion. Then, move the MLP files to your regular computer.

Then, well, either you leave your MLP files untouched (or put them inside a container such as .mka or .m4a), and rely on something like that VLC (or possibly foobar2000) that can play them out of the box. Or use FFMpeg to convert them to FLAC (for the conversion part, I'd rather trust a modern FFmpeg rather that some old unmaintained tool, but for extracting the MLP files, DVD-Audio Explorer 2008 still seems good).