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Correction & Additional Help
Authored by: bedouin on Jan 29, '05 08:46:31PM
For the latest versions of mplayer, it searches in /Library/Application Support/ffmpegX/reallib/ for the Real codecs, not /usr/local/lib. Alternatively, the codecs can also be obtained from the Helix DNA Producer here. After unzipping the archive (helixproducer_10_macosx.sit at the time of this writing) you can find them in the codecs folder.

This hint was a lifesaver. I regularly listen to audio lectures encoded as RM files, but must convert them to MP3 to play them on my Creative MuVo. Prior to finding this hint the only way I could do this was through VPC, with a now nonexistent Windows app called Streambox Ripper, which was slow and oftentimes crashed. Now conversions take a matter of minutes.

For those interested in simply converting a RM file to WAV this is the only command you need:

mplayer test.rm -ao pcm -aofile test.wav

Replace test with the actual filename. Afterwards, use LAME, iTunes, or any other capable app to convert to MP3.

I suggest you keep a backup copy of the ffmpegX binaries, as well as the Real codecs in case either change in some way that makes this tip no longer work.

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Automating the Process
Authored by: bedouin on Jan 29, '05 11:16:53PM
Assuming you have mplayer in your path, this script helps speed things up a bit, and should be invoked like this:

ra2wav filename.rm filename.mp3

#! /bin/bash
mplayer $1 -ao pcm -aofile $1.wav -vc dummy -vo null
lame $1.wav $2
rm $1.wav

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