AVAudioRecorder Corrupts file unless recordWithDuration set

Question

For some reason in my app I cannot seem to start and stop recording.
I have taken my code right from the Documentation on using AVAudioRecorder class on the apple website. If i set [recorder recordWithDuration:10]; the app works fine it records for 10 seconds and as long as i let it finish by itself i can play back the file. if however I try and do [recorder stop]; The file becomes corrupted. I also recieve an error in the console.
2009-07-30 16:41:12.924 Scribe Direct Mobile[1996:207] recorder: NSOSStatusErrorDomain 560030580 (null)
here is the start and stop code
-(IBAction)record:(id)sender
[button addTarget:self action:@selector(stopRecording:) forControlEvents:UIControlEventTouchUpInside];
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
NSError *err = nil;
[audioSession setCategory :AVAudioSessionCategoryRecord error:&err];
if(err){
NSLog(@"audioSession: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
return;
[audioSession setActive:YES error:&err];
err = nil;
if(err){
NSLog(@"audioSession: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
return;
self.recordSetting = [[NSDictionary alloc] initWithObjectsAndKeys:
[NSNumber numberWithFloat: 44100.0], AVSampleRateKey,
[NSNumber numberWithInt: kAudioFormatAppleLossless], AVFormatIDKey,
[NSNumber numberWithInt: 1], AVNumberOfChannelsKey,
[NSNumber numberWithInt: AVAudioQualityMax], AVEncoderAudioQualityKey,
nil];
self.recordSetting = [[NSMutableDictionary alloc] init];
[recordSetting setValue:[NSNumber numberWithInt:kAudioFormatLinearPCM] forKey:AVFormatIDKey];
[recordSetting setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey];
[recordSetting setValue:[NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey];
[recordSetting setValue :[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey];
[recordSetting setValue :[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsBigEndianKey];
[recordSetting setValue :[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsFloatKey];
// Create a new dated file
//NSDate *now = [NSDate dateWithTimeIntervalSinceNow:0];
//NSString *caldate = [now description];
NSNumber *rand1;
rand1 = [NSNumber numberWithUnsignedInt:arc4random()];
fmod([rand1 floatValue], 1000.0); //random number from 0-1000;
self.soundFilePath = [[NSString stringWithFormat:@"%@/%@-%@.caf", DOCUMENTS_FOLDER, @"noodles", rand1] retain];
NSURL *url = [NSURL fileURLWithPath:self.soundFilePath];
err = nil;
recorder = [[ AVAudioRecorder alloc] initWithURL:url settings:recordSetting error:&err];
if(!recorder){
NSLog(@"recorder: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
UIAlertView *alert =
[[UIAlertView alloc] initWithTitle: @"Warning"
message: [err localizedDescription]
delegate: nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
[alert release];
return;
//prepare to record
[recorder setDelegate:self];
[recorder prepareToRecord];
recorder.meteringEnabled = YES;
BOOL audioHWAvailable = audioSession.inputIsAvailable;
if (! audioHWAvailable) {
UIAlertView *cantRecordAlert =
[[UIAlertView alloc] initWithTitle: @"Warning"
message: @"Audio input hardware not available"
delegate: nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[cantRecordAlert show];
[cantRecordAlert release];
return;
// start recording
[recorder recordForDuration:20];
[button setTitle:@"Stop Recording" forState:UIControlStateNormal];
//[self.button setEnabled:NO];
- (IBAction) stopRecording:(id)sender
[recorder stop];
NSError *err = nil;
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
[audioSession setActive:NO error: &err];
if(err){
NSLog(@"recorder: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
self.recorder = nil;
[button setTitle:@"Record" forState:UIControlStateNormal];
[button addTarget:self action:@selector(record:) forControlEvents:UIControlEventTouchUpInside];
}

Answer 1

My apologies here it is reposted not borked! I am not using any buffers that I know of. I am simply using the AVRecorder class and the code defined in the documentation at this page: http://developer.apple.com/IPhone/library/documentation/iPhone/Conceptual/iPhone OSProgrammingGuide/AudioandVideoTechnologies/AudioandVideoTechnologies.html
for playback I used the avTouch example which works perfectly. I jsut need the recording to be able to start and stop. recordWithDuration is not very useful if it has to finish in order to record successfully.
-(IBAction)record:(id)sender
button addTarget:self action:@selector(stopRecording:) forControlEvents:UIControlEventTouchUpInside;
AVAudioSession *audioSession = AVAudioSession sharedInstance;
NSError *err = nil;
audioSession setCategory :AVAudioSessionCategoryRecord error:&err;
if(err){
NSLog(@"audioSession: %@ %d %@", err domain, err code, [err userInfo] description);
return;
audioSession setActive:YES error:&err;
err = nil;
if(err){
NSLog(@"audioSession: %@ %d %@", err domain, err code, [err userInfo] description);
return;
self.recordSetting = [NSDictionary alloc initWithObjectsAndKeys:
NSNumber numberWithFloat: 44100.0, AVSampleRateKey,
NSNumber numberWithInt: kAudioFormatAppleLossless, AVFormatIDKey,
NSNumber numberWithInt: 1, AVNumberOfChannelsKey,
NSNumber numberWithInt: AVAudioQualityMax, AVEncoderAudioQualityKey,
nil];
self.recordSetting = [NSMutableDictionary alloc] init;
[recordSetting setValue:NSNumber numberWithInt:kAudioFormatLinearPCM] forKey:AVFormatIDKey;
[recordSetting setValue:NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey;
[recordSetting setValue:NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey;
[recordSetting setValue :NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey;
[recordSetting setValue :NSNumber numberWithBool:NO] forKey:AVLinearPCMIsBigEndianKey;
[recordSetting setValue :NSNumber numberWithBool:NO] forKey:AVLinearPCMIsFloatKey;
// Create a new dated file
//NSDate *now = NSDate dateWithTimeIntervalSinceNow:0;
//NSString *caldate = now description;
NSNumber *rand1;
rand1 = NSNumber numberWithUnsignedInt:arc4random();
fmod(rand1 floatValue, 1000.0); //random number from 0-1000;
self.soundFilePath = [NSString stringWithFormat:@"%@/%@-%@.caf", DOCUMENTS_FOLDER, @"noodles", rand1] retain;
NSURL *url = NSURL fileURLWithPath:self.soundFilePath;
err = nil;
recorder = [ AVAudioRecorder alloc] initWithURL:url settings:recordSetting error:&err;
if(!recorder){
NSLog(@"recorder: %@ %d %@", err domain, err code, [err userInfo] description);
UIAlertView *alert =
[UIAlertView alloc initWithTitle: @"Warning"
message: err localizedDescription
delegate: nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
alert show;
alert release;
return;
//prepare to record
recorder setDelegate:self;
recorder prepareToRecord;
recorder.meteringEnabled = YES;
BOOL audioHWAvailable = audioSession.inputIsAvailable;
if (! audioHWAvailable) {
UIAlertView *cantRecordAlert =
[UIAlertView alloc initWithTitle: @"Warning"
message: @"Audio input hardware not available"
delegate: nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
cantRecordAlert show;
cantRecordAlert release;
return;
// start recording
recorder recordForDuration:20;
button setTitle:@"Stop Recording" forState:UIControlStateNormal;
//self.button setEnabled:NO;
* (IBAction) stopRecording:(id)sender
recorder stop;
NSError *err = nil;
AVAudioSession *audioSession = AVAudioSession sharedInstance;
audioSession setActive:NO error: &err;
if(err){
NSLog(@"recorder: %@ %d %@", err domain, err code, [err userInfo] description);
self.recorder = nil;
button setTitle:@"Record" forState:UIControlStateNormal;
button addTarget:self action:@selector(record:) forControlEvents:UIControlEventTouchUpInside;