Convert mp3 to lower-quality mp3?
Convert mp3 to lower-quality mp3?
- Subject: Convert mp3 to lower-quality mp3?
- From: Bill Monk <email@hidden>
- Date: Mon, 9 May 2005 12:27:42 -0500
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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