To encode MP3 files, you need the source audio file, usually a .WAV file. You can create .WAV's by ripping
tracks from regular audio CD's.
To rip tracks from CD's, you can use cdparanoia or
cdda2wav.
cdparanoia only works on SCSI drives. This means you have to enable SCSI emulation
on your linux machine if you only have IDE cdrom drives (like most people do).
When this is ok, you have to find out if cdparanoia can find the scsi interface for your cdrom drive.
Just type :
# cdparanoia -vsQ
cdparanoia III release 9.8 (March 23, 2001)
(C) 2001 Monty <monty@xiph.org> and Xiphophorus
Report bugs to paranoia@xiph.org
http://www.xiph.org/paranoia/
Checking /dev/cdrom for cdrom...
Testing /dev/cdrom for cooked ioctl() interface
/dev/sr0 is not a cooked ioctl CDROM.
Testing /dev/cdrom for SCSI interface
generic device: /dev/sg0
ioctl device: /dev/sr0
Found an accessible SCSI CDROM drive.
Looking at revision of the SG interface in use...
SG interface version 3.1.24; OK.
CDROM model sensed sensed: HITACHI DVD-ROM GD-S250 0010
Checking for SCSI emulation...
Drive is ATAPI (using SCSI host adaptor emulation) |
This looks good. Now we can start ripping tracks. An example :
# cdparanoia -w "2" "Track_nr2.wav"
|
This will rip the 2nd track and store it in "Track_nr2.wav". Make sure you have enough free
disk space available to store the wav files. If you want to know more about cdparanoia,
just type "man cdparanoia".
The 2nd audio ripper is cdda2wav. This software can rip audio tracks from CD using regular ATAPI cdrom drives.
You no longer need SCSI emulation and as a bonus, audio extraction is a lot faster on a 2.6 kernel because it also
supports DMA on ATAPI drives. Get it here.
To use it, just type :
# cdda2wav dev=/dev/cdrom -t 5 track05.wav
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To convert wav's to mp3's , you can use
bladeenc or
lame.
An example :
# bladeenc -192 "Track_nr2.wav"
|
This wil convert Track_nr2.wav into a 192 Kbps MP3 called Track_nr2.mp3. This can take a few minutes,
depending on the processor power (a P200MMX needs 5 minutes to convert a 50 MB wav). Bladeenc works fine but
can only produce CBR (Constant Bitrate) MP3 files.
Lame can also create ABR (Average Bitrate) or VBR (Variable Bitrate) MP3 files. This allows you to maintain
high quality encoding while using less diskspace. An example :
# lame -V 2 -b 192 "Track_nr2.wav" "Track_nr2.mp3"
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This wil convert Track_nr2.wav into an MP3 called Track_nr2.mp3 of variable bitrate with a minimal bitrate of 192 Kbps.
The "-V n" option specifies the quality level (default = 4).
