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I'm looking for an .m4a to .mp3 converter for Windows XP, preferably open source.

Does anyone have any suggestions?

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5 Answers 5

Converting from lossy to lossy formats will result in quality loss. However i would probably recommend free:ac if you have to do it. Its FOSS, and has been fairly reliable and simple to use for me.

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+1 for pointing out the quality loss. It can be pretty severe too. –  afrazier Jul 9 '11 at 14:37

FFmpeg for sure.

FFmpeg is a complete, cross-platform solution to record, convert and stream audio and video.

FFmpeg is free software licensed under the LGPL or GPL depending on your choice of configuration options. If you use FFmpeg or its constituent libraries, you must adhere to the terms of the license in question. You can find basic compliance information and get licensing help on our license and legal considerations page.

Run something like this (there is a massive variety of configuration options available, but this will get you started):

ffmpeg -i in.mp4 out.mp3
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If you already use iTunes (not OSS, I realize, but free as in beer), you can use the directions on this page. Go to the Edit menu, click the Import Settings button and select the MP3 Encoder. Now you can right click and save to MP3.

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Audacity would work, open source.

Besides being arguably the best player out there, VLC can convert video/auto. Also open source.

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You should try Format Factory, it converts almost all types into another even mobile devices etc...And a short video about its capabilities...

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