On Wed, Mar 24, 2004 at 01:28:57PM +0000, Adam Funk said > On Wednesday 24 March 2004 07:40, Rob Weir wrote: > > > On Mon, Mar 22, 2004 at 11:23:03AM +0000, Adam Funk said > >> (I'm running sox 12.17.4 on Debian testing.) > >> > >> sox -h and the man page suggest mp3 support, but > >> > >> $ sox foo.wav foo.mp3 > >> sox: Sorry, no MP3 encoding support > >> > >> produces nothing (actually an empty file), although > >> > >> $ sox foo1.mp3 foo1.wav > >> sox: Do not support MPEG audio (layer I, III or III) with 16-bit > >> data. Forcing to Signed. > >> > >> produces a wav file. I assume this is because of licensing issues > >> with the MP3 encoding algorithm, right? > > > > Yes, Debian contains no mp3 encoding code. You can get packages of > > So how is it that the Debian-packaged normalize works on MP3s? It must > encode as well as decode them since it modifies the MP3 file. Hm, I don't know. It does Depend on libmad0 which is a "MPEG audio decoder library", though. Maybe it's possible to scale the amplitude of MP3s without re-encoding them? Or maybe it just outputs normalised .wav files? > (Curiously, it doesn't support Ogg-Vorbis!) IIRC, the Vorbis format has a metadata field within the file that lets you specify a normalisation level, which decoders will honour. -- Rob Weir <rweir@ertius.org> | mlspam@ertius.org | Do I look like I want a CC? Words of the day: AIMSX Geraldton fraud supercomputer Uzi MD5 JPL rail gun
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