Hi,
I have a couple of concert DVDs and I'm trying to extract the audio from them. There are 3 DVDs and "DVD Audio Extractor" reports them as
1) 24b/96KHz
2) 16b/48KHz
3) 16b/44KHz
Firstly is "DVD Audio Extractor" the correct tool for extracting the audio? Are there any other tools that might be better?
Secondly will changing the frequency and bitrate have a significant impact on quality (will be stores in flac)? I was looking at some listening test results and they don't seem to be definite yet.

Thanks

I'd use old DVDDecrypter in stream mode. You can let it split the audio at chapter points if you want. If the audio is PCM, you should convert to flac with foobar (do not resample frequency), otherwise if it's ac3/mp2, leave them as is.

If you need to encode/transcode to a another format, do the required resampling in the same process with foobar. Resampling (once) between 44/48/96 khz is generally considered transparent if done properly.

u can try with
http://www.xilisoft.com/audio-converter.html .
i donno the downloadable page search for Xilisoft Video or auido converter.

I would second using DVDDecrypter. If you search this board you will find various topics on this subject. Here is a recent one:

http://www.hydrogenaudio.org/forums/index....showtopic=59029

One more shout out for DVD Decrypter.

I've used DVD Audio Extractor a few times without problems. I left them at their native sample rates. DVD would only support 16-bit/48KHz anyways tho wouldn't it?

To make it really simple, make a shortcut to DVDDecrypter.exe with the following arguments. In most cases you can then simply press the Decrypt button, no matter what default settings you have:

"DVDDecrypter.exe" /MODE IFO /SPLIT CHAPTER /DEMUX 0x80

If you have DVD Audio Extractor and it works for you, I'd stick with it.

AFAIK, DVD Decrypter can't transcode the audio. That's fine for LPCM, but with Dolby AC3 you'll probably want to transcode it to something else.

- The actual extraction process should be lossless, no matter what software you use.

- Assuming you transcode the file, your choice of decoder shouldn't affect the audio quality either.

- If you transcode to a lossy format, the encoder might make a difference.


I've made a few audio CDs from concert DVDs (with a few different tools), and I have never been able to hear any degradation from the 48kHz to 44.1kHz downsampling.

Is this an Audio DVD? 24/96kHz and 16/44kHz don't look right for a regular video-DVD...

I'd feel safer with a program that does not resample or encode at all.

DVD Video can include DTS 24/96 (Most Queen concerts) and PCM 24/96 (DVD Demo discs and Se7en DVD opening title extra) tracks. The latter being extremely rare due to it's size.

you want something that will extract the bitstream like mplayer:

mplayer -dumpaudio -dumpfile AUDIO.LPCM dvd://


later