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View Full Version : Ripping LPCM with DVD Decrypter

unno
14th April 2008, 22:28
I'm trying to rip a PCM track off of a DVD so I can convert it to flac and add it to my music collection. Unfortunately, I seem to have run into a problem. I've ripped two PCM streams off two different DVD's using DVD Decrypter (and its built-in demuxing feature). I end up with wav's that I can open and play, but in both cases, the waveforms are clipped really badly.

In the first case (a Trans-Siberian Orchestra DVD), I just assumed the audio engineer was an idiot, but now I've tried ripping Queen's Night at the Opera, and I've got the same thing.

http://img297.imageshack.us/img297/41/waveformdg6.th.gif (http://img297.imageshack.us/my.php?image=waveformdg6.gif)
As you can see for the image, everything is clipped like crazy. What's more the clipping is all the way down at .7668 (talk about a waste of 24-bit space). Is there something I could be doing wrong, or do people just not give a crap about their PCM tracks?

Thanks,
Unno
setarip_old
15th April 2008, 02:56
Hi!

Is it possible that DVD Decrypter can only process as 16bit?
unno
15th April 2008, 04:30
I considered that possibility, but I don't think that's the case. It recognizes the file as 24-bit and does not give me any sort of error messages. Furthermore, the TSO disc that I mentioned produced similar results even though it was only 16-bit.
madshi
16th April 2008, 08:46
Hey,

I'm looking for a 24bit PCM VOB sample to add PCM demuxing support for my eac3to too. Would you mind uploading a small sample for me?

You can try eac3to to process your 16bit sample ("eac3to whatever.vob audio.wav"). Does that also result in clipped WAVs?
bmnot
16th April 2008, 09:58
Very few DVDs have 24 bit PCM, but if you're looking for some to sample, check out David Gilmour in Concert.
unno
18th April 2008, 04:52
I'd be happy to provide you with a sample, but I don't really know much about this kind of stuff. How can I split a Vob file into a small enough chunk to send?
madshi
18th April 2008, 07:04
I'd be happy to provide you with a sample, but I don't really know much about this kind of stuff. How can I split a Vob file into a small enough chunk to send?
There are multiple possibilities. I'm usually doing something like this:

(1) Download this free hexeditor: http://www.mh-nexus.de/
(2) Open the VOB in the hexeditor and delete everything but the first few MBs.
(3) Make sure you choose "save as" as opposed to "save".

Thank you! :)