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I am looking for a good gem/plugin to convert user-uploaded audio files to different formats. One format in particular that I am interested in is converting to Apple .caf with ima4 compression for inclusion in an iPhone app.
I have been using afconvert on my mac for this so far, but I need to do it on my linux box, server-side. Ideally, I would be able to work into paperclip.
As an additional solution, ffmpeg could work, but I have not seen any .caf options for it. Anybody know of one?
The Sound eXchange project supports lots of audio file conversions. I’ve used this in the past to convert aiff files output by the OS X “say” program to ulaw files for Asterisk. This yields rather nice text-to-speech. For my purposes, I also found a Ruby extension on github called sox-ruby that wraps the libsox functions directly.