Unpacking IPA files and converting CAF to M4R #
To explore an iOS app (IPA) file, simply change the extension to ZIP and double click to unzip. Right click the APP file inside of the Payload directory and select "Show Package Contents". CAF audio files can be converted to M4R (ringtones) via afconvert:
$ afconvert -v -f m4af input.caf output.m4r
If you attempt to import a ringtone longer than 30 seconds into your iPhone, this enigmatic error will appear:
The ringtone "foo" was not copied to the iPhone "bar" because its duration is too long.
/mac | Feb 11, 2013
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