How to record audio as mp3 file by using AvAudiorecorder in iOS

Question

How to record audio as an mp3 file by using AvAudiorecorder?.I m using the following code for the recorder setting

recordSetting =  [NSDictionary dictionaryWithObjectsAndKeys:
                  [NSNumber numberWithInt:AVAudioQualityMin],AVEncoderAudioQualityKey,
                  [NSNumber numberWithInt:16], 
                   AVEncoderBitRateKey,
                   [NSNumber numberWithInt: 2], 
                   AVNumberOfChannelsKey,
                   [NSNumber numberWithFloat:44100.0], 
                   AVSampleRateKey,nil];

Solution

Add

[NSNumber numberWithInt:kAudioFormatMPEGLayer3] forKey:AVFormatIDKey

However it's impossible to encode mp3 format at IPhone because of royalty.

Comments

[Alok Chandra]

Thanks for your feedback i used this but i m getting error "Error Domain=NSOSStatusErrorDomain Code=1718449215 "The operation couldn’t be completed. (OSStatus error 1718449215.)" .please provide me complete setting code,if possible,thanks in advance.