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I've got an old and temperamental MP3 player which doesn't deal well with MP3s that have fancy things like a variable bit rate.

Is there a command line tool for Mac or Linux that I could use to re-encode MP3s so they have a fixed bitrate?

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up vote 1 down vote accepted

For Linux, consider FFmpeg --

For Windows, Linux or OSX, use lame --

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LAME is probably the best known name in the business, though it is a very advanced system and not for someone "new" to the command line.

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Most of the GUIs use lame in the back-end, so you get my vote for mentioning it. – user3463 Oct 6 '10 at 4:42
D'oh! I'd previously looked at lame, but for some reason I'd assumed that it only accepted WAV files. Thanks. – David Wolever Oct 6 '10 at 14:54

Check out MP3Packer it can change files from vbr to cbr.

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