How to convert .caf to .mp3 file programmatically on the iPhone or iPad?

问题

is there a way to programmatically convert .caf audio files to .mp3 audio files on the iPad platform?

回答1:

There is NO way to encode TO mp3 on the iPhone. Apple does not provide the encoders for mp3, presumably due to licensing.

回答2:

OSStatus AudioConverterFillComplexBuffer(

   AudioConverterRef                   inAudioConverter,      
   AudioConverterComplexInputDataProc  inInputDataProc,   
   void                                *inInputDataProcUserData,   
   UInt32                              *ioOutputDataPacketSize,  
   AudioBufferList                     *outOutputData,  
   AudioStreamPacketDescription        *outPacketDescription  
);

Still working on an implementation, but this method is meant to be used for this conversion.

It is declared in audiotoolbox -> audioConverter

来源：https://stackoverflow.com/questions/3474547/how-to-convert-caf-to-mp3-file-programmatically-on-the-iphone-or-ipad