How to record audio in objective c for iphone app in .amr format? - ios

Question

I have used following code to record audio. It works perfectly for .caf format.
dirPaths = NSSearchPathForDirectoriesInDomains(
NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = [dirPaths objectAtIndex:0];
NSString *soundFilePath = [docsDir
stringByAppendingPathComponent:#"sound.caf"];
NSURL *soundFileURL = [NSURL fileURLWithPath:soundFilePath];
NSDictionary *recordSettings = [NSDictionary
dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:AVAudioQualityMin],
AVEncoderAudioQualityKey,
[NSNumber numberWithInt:16],
AVEncoderBitRateKey,
[NSNumber numberWithInt: 2],
AVNumberOfChannelsKey,
[NSNumber numberWithFloat:44100.0],
AVSampleRateKey,
nil];
NSError *error = nil;
audioRecorder = [[AVAudioRecorder alloc]
initWithURL:soundFileURL
settings:recordSettings
error:&error];
But for .amr if i change extension to .amr as per below it is not working for me to record audio.
NSString *soundFilePath = [docsDir
stringByAppendingPathComponent:#"sound.amr"];
can any body guide me how to record and save audio in .amr format?

Answer 1

try below Code, might be useful to you..
AppDelegate *del = (AppDelegate*)[[UIApplication sharedApplication]delegate];
//set path & name for Recording Audio
NSString *dataPath=[del.path_Folder_Document copy];
NSString *filePath = [NSString stringWithFormat:#"%#/Images_Audio/%#.3gp", dataPath,[ARR_Img_File_Name_Moment objectAtIndex:pos]];
NSLog(#"Audio File Path =%#",filePath);
NSURL *tmpFileUrl = [NSURL fileURLWithPath:filePath];
//set Record Setting
NSDictionary *recordSettings = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt: kAudioFormatMPEG4AAC], AVFormatIDKey,
[NSNumber numberWithFloat:8000.0], AVSampleRateKey,
[NSNumber numberWithInt: 1], AVNumberOfChannelsKey,
nil];
NSError *error = nil;
//Prepare Recorder to Start Recording Audio
recorder = [[AVAudioRecorder alloc] initWithURL:tmpFileUrl settings:recordSettings error:&error];
recorder.delegate = self;
[recorder prepareToRecord];
AVAudioSession *session = [AVAudioSession sharedInstance];
[session setCategory:AVAudioSessionCategoryRecord error:nil];
[session setActive:YES error:nil];
//Start Recording Audio ..
if ([[NSFileManager defaultManager] isWritableFileAtPath:filePath]) {
NSLog(#"Writable Pathforimage_Audio 1st>> %#", filePath);
}else
{
NSLog(#"Not Writable");
}
[recorder record];
NSLog(#"its recording audio...");