Original: http://www.ubuntugeek.com/how-to-rip-dvd-audio-to-mp3-or-ogg.html
You can extract sound from a DVD, one track at a time or a chapter at a time. Some simple command line examples should suffice to demonstrate how this is done.
First thing you need to do is make sure you have lsdvd and transcode installed:
sudo apt-get install lsdvd transcode
A DVD in your DVD drive will probably be identified as /dev/dvd. Have a look at its table of contents with the lsdvd command
lsdvd
to find the track information, and the longest track
Output looks like as follows
libdvdread: Using libdvdcss version 1.2.5 for DVD access
Title: 01, Length: 02:32:44 Chapters: 26, Cells: 27, Audio streams: 02, Subpictures: 01
Title: 02, Length: 00:17:36 Chapters: 02, Cells: 02, Audio streams: 01, Subpictures: 00
Title: 03, Length: 00:00:11 Chapters: 02, Cells: 02, Audio streams: 01, Subpictures: 00
Longest track: 1
To capture the audio from the tenth chapter of the first title, saving it in ogg format, the command line is simply
transcode -i /dev/dvd -x dvd -T 1,10,1 -a 0 -y ogg -m track10.ogg
The arguments identify the input as /dev/dvd (-i), the type of input as DVD (-x), the title, chapter, and angle to encode, in this case being title 1, chapter 10, and camera angle 1 (-T), the audio track is track 0 (-a), the output format is ogg (-y, and the output filename is track10.ogg (-m).
generates mp3 output of chapter 20 from title 1
transcode -i /dev/dvd -x dvd -T 1,20,1 -a 0 -y raw -m track20.mp3
To extract the whole audio track of a title (all chapters) as ogg audio
transcode -i /dev/dvd -x dvd -T 1,-1 -a 0 -y ogg -m audiotrack.ogg
If you prefer WAV files, the following will do it
transcode -i /dev/dvd -x dvd -T 1,20 -a 0 -y wav -m track20.wav
