Re: Convert mp3 to lower-quality mp3?
Re: Convert mp3 to lower-quality mp3?
- Subject: Re: Convert mp3 to lower-quality mp3?
- From: Wayne Hasley <email@hidden>
- Date: Mon, 09 May 2005 11:02:32 -0700
Bill,
Apple doesn't include an MP3 encoder... I'm not clear why they don't - I *think* it might be a legal issue...
Take a look at LAME...
http://lame.sourceforge.net/
(from the web page)
LAME is an LGPL MP3 encoder. The Open source development model allowed to improve its quality and speed since 1999. It is now an highly evolved MP3 encoder, with quality and speed able to rival state of the art commercial encoders.
Wayne
On Monday, May 09, 2005, at 10:28AM, Bill Monk <email@hidden> wrote:
>I need to batch-convert higher-quality stereo mp3 files to much lower
>quality mp3 files. Basically mono, low-bit-rate, low-sample-rate, and
>small enough to email; low fidelity is not a problem.
>
>I already had working Quicktime code which exports files into a variety
>of formats using ConvertMovieToFile(), using settings obtained from
>MovieExportDoUserDialog() and saved/reused via
>MovieExportGetSettingsAsAtomContainer() and
>MovieExportSetSettingsAsAtomContainer().
>
>My assumption was that converting mp3s would be as trivial as
>configuring an mp3 export component and handing it to
>ConvertMovieToFile(). Inexplicably, there doesn't seem to *be *such a
>component. That's rather surprising, but OK, whatever....
>
>Given the non-existence of an mp3 export component(corrections gladly
>accepted), can anyone point me to information on doing this in
>CoreAudio?
>
>I've looked at the afconvert tool AudioFileTools CA sample code; it
>also doesn't seem to be able to do this conversion -- but maybe I
>haven't understood the tool and its options correctly. My attempts all
>result in "Error: transcoding not currently supported".
>
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