Date: Wed, 21 Mar 2012 12:30:11 +0100 From: Polytropon <freebsd@edvax.de> To: Rod Person <rodperson@rodperson.com> Cc: FreeBSD Mailing List <freebsd-questions@freebsd.org> Subject: Re: Convert mp3 to audio CD Message-ID: <20120321123011.b04815b8.freebsd@edvax.de> In-Reply-To: <20120321072511.000023ec@unknown> References: <4F694698.5080009@gmail.com> <20120321070740.000059cb@unknown> <20120321121624.d644f31e.freebsd@edvax.de> <20120321072511.000023ec@unknown>
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On Wed, 21 Mar 2012 07:25:11 -0400, Rod Person wrote: > On Wed, 21 Mar 2012 12:16:24 +0100 > Polytropon <freebsd@edvax.de> wrote: > > > On Wed, 21 Mar 2012 07:07:40 -0400, Rod Person wrote: > > > On Tue, 20 Mar 2012 23:10:16 -0400 > > > Steve Bertrand <steve.bertrand@gmail.com> wrote: > > > > > > > I know this is a backwards request, as I haven't had to go from > > > > mp3 to audio CD format in at least 10 years, but I do now. > > > > > > > > What is available to do so? > > > > > > > > > > Basically the same as other, but just using lame to convert a > > > directory full of mp3s > > > > > > > > > #!/bin/sh > > > > > > for a in * > > > do > > > OUTF=`echo "$a" | sed s/\.mp3/.wav/g` > > > lame --decode -q 0 "$a" "$OUTF" > > > done > > > > Just note that those *.wav files will have to be in the > > correct format (44.1 kHz two-channel 16 bit) and maybe > > require "byte order reversal" as well as stripping the > > WAV headers to record them as a music CD. It seems that > > some recording programs already contain this step. Refer > > to audio CD specifications for why pure WAV files don't > > make an audio CD. > > > > I've used this for years and never had an issues, but to accomplish > removing the header you would use the -t option along with --decode for > lame and -x does a bit swap, but not sure if that is the same byte order > reversal. Yes, I think that's the correct approach. My old script, written when I was new to FreeBSD (at v4.0), uses the unelegant "sox -r 44100 -c 2 -w -s $FILE.raw $FILE.cdr" to convert to the proper CD audio format which could also be used by burncd (deprecated?), but also by cdrdao and cdrecord with no additional conversion parameters. Thanks for the hint about lame --decode! -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...
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