Re: CD Audio conversion

On Thu, Nov 10, 2016 at 07:19:33AM +0000, Amir Gurvitz wrote:
> Does Lame support CD Audio (cda) conversion to MP3 ?

Not exactly. Audio CDs do not have a standard file system like CD-ROMs, DVDs, 
flash drives and hard drives. The audio data is intermingled with other data 
streams and error-correction info in a unique binary format.

.cda files are stub files created by Windows to represent the layout of an 
audio CD: the number of tracks & their durations, basically, not the actual 
content. They useless to LAME. See https://en.wikipedia.org/wiki/.cda_file

LAME requires a stream of actual audio data, or the name of a file containing 
audio data, as input. The very beginning of the detailed documentation at 
http://lame.cvs.sourceforge.net/viewvc/lame/lame/doc/html/detailed.html 
explains what formats are supported.

To get audio data from a CD, you should use Digital Audio Extraction (DAE, 
a.k.a. "ripping") software. DAE software uses special APIs to try to read the 
16-bit, 44100 Hz linear PCM audio data from the disc.

The DAE software may temporarily store the PCM data in a standard container 
file format such as WAV or AIFF for later, separate conversion to MP3 by LAME. 
Or, the software may stream the PCM dta directly to a LAME library and write 
the resulting MP3 to a file.

Hope this helps.

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