How to record an audio file in .mp3 format?

iphone objective-c audio core-audio avaudiorecorder

The Problem is kAudioFormatMPEGLayer3 which is not supported by AVAudioRecorder.

Alternatively you can use kAudioFormatAppleIMA4 for your recording purpose.

Finally you can write your own encoding logic to convert kAudioFormatAppleIMA4 in to MP3 Format.

The other supported encoding for Recording purpose are

kAudioFormatMPEG4AAC   kAudioFormatAppleLossless  kAudioFormatAppleIMA4   kAudioFormatiLBC kAudioFormatULaw kAudioFormatLinearPCM

For more info you can refer to this post of SO.

CodeHunter