in reply to re-encode mp3 files

In addition to what you've got already, take a look at Ffmpeg and just calling the ffmpeg executable from within Perl.

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Re^2: re-encode mp3 files
by keiusui (Monk) on May 26, 2009 at 22:31 UTC
    Thank you so much for this. Installing ffmpeg and calling it from the command line turned out to be the easiest solution.