I have tested this on two different iPad3s and on one I can record and playback both .m4a and .caf files on the other I can only playback .caf files.
What I do is record a .m4a-file using the setting
AVFormatIDKey set to kAudioFormatMPEG4AAC
On the one iPad it works fine. If I test it on the other iPad I get the error "OSStatus error 1685348671" when I try to play the file recorded.
However if I comment out that setting and record as a .caf-file it works flawlessly.
Here the relevant code snippets:
NSDictionary *recorderSettings = [NSDictionary dictionaryWithObjectsAndKeys:
//[NSNumber numberWithInt:kAudioFormatMPEG4AAC], AVFormatIDKey,
[NSNumber numberWithInt:AVAudioQualityMin], AVEncoderAudioQualityKey,
[NSNumber numberWithInt:16], AVEncoderBitRateKey,
[NSNumber numberWithInt:1], AVNumberOfChannelsKey,
[NSNumber numberWithFloat:16000.0], AVSampleRateKey, nil];
I then go and call a simple
AudioRecorder *audioRecorder = [[AVAudioRecorder alloc] initWithURL:soundFileURL settings:recorderSettings error:&error];
To play back I call
AudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:soundFileURL error:&error];
[audioPlayer play];
Thanks
Related
I'm attempting to use AVAudioRecorder on MacOSX 10.14.x to get audio level readings of an input source -- in this case, the microphone. As this isn't on iOS, the use of AVAudioSession does not apply. I did enable the microphone in the SandBox settings, as well as double-checking everything in Audio Midi Setup app, with the microphone set to 2ch 24-bit Integer 44.1kHz. I've removed all error checking, but everything should be fine (eg. apparent success on all calls to the recorder object). Also, I tried this on another 10.14.x machine with the same result.
When I run this, all I get is values of -120.0 for both the average and peak power in my callback, even if there is audio.
Any idea what I'm doing wrong?
Note: When I initiate [recorder prepareToRecord], I receive these two error messages:
no saved enable hardware sample rate converter preference found
ca_debug_string: inPropertyData == NULL
AVAudioRecorder *recorder; // instance variable
NSTimer *levelTimer; // instance variable
NSURL *url = [NSURL fileURLWithPath: #"/dev/null"];
NSDictionary *settings = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithFloat: 44100.00], AVSampleRateKey,
[NSNumber numberWithInt: kAudioFormatMPEG4AAC], AVFormatIDKey,
[NSNumber numberWithInt: 1], AVNumberOfChannelsKey,
[NSNumber numberWithInt: AVAudioQualityHigh], AVEncoderAudioQualityKey,
nil];
NSError *error = nil;
recorder = [[AVAudioRecorder alloc] initWithURL:url settings:settings error:&error];
[recorder prepareToRecord];
recorder.meteringEnabled = YES;
[recorder record];
levelTimer = [NSTimer scheduledTimerWithTimeInterval:0.03
target:self
selector:#selector(levelTimerCallback:)
userInfo:nil
repeats:YES];
- (void)levelTimerCallback:(NSTimer *)timer {
[recorder updateMeters];
float peakPower = [recorder peakPowerForChannel:0];
float avgPower = [recorder averagePowerForChannel:0];
}
i am using a lot the AVRecorder and AVPlayer.
i saw that they both , delay when i am back to my app ,after she was on background- then if for example i am trying to record , it takes 4 seconds till it starts .
in my code, i am preparing to record before i am recording, but when back to app, it doesnt help .
what can i do to improve it ?
this is done when app is open(at the start, not when back from background! )
-(void)prepareToRecord
{
NSArray *dirPaths;
NSString *docsDir;
NSString *sound=[NSString stringWithFormat:#"sound%d.caf",[memoryInstnace getNextFreePlace]];
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) ;
docsDir = [dirPaths objectAtIndex:0];
currentSoundFilePath = [docsDir stringByAppendingPathComponent:sound];
NSURL *soundFileURL = [NSURL fileURLWithPath:currentSoundFilePath];
NSDictionary *settings = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithFloat: 44100.0], AVSampleRateKey,
[NSNumber numberWithInt: kAudioFormatAppleLossless], AVFormatIDKey,
[NSNumber numberWithInt: 1], AVNumberOfChannelsKey,
[NSNumber numberWithInt: AVAudioQualityMax], AVEncoderAudioQualityKey,
nil];
NSError *error;
recorder = [[AVAudioRecorder alloc] initWithURL:soundFileURL settings:settings error:&error];
//to not having a delay befor record
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
[audioSession setCategory:AVAudioSessionCategoryRecord error:nil];
if (recorder)
{
[recorder prepareToRecord];
recorder.meteringEnabled = YES;
}
else
NSLog( #"error in recordings" );
}
thanks !
If another app had grabbed the control of the mic via starting an active AVAudioSession, then iOS will fade out control from that app and give it to you when you activate your session. This can take a second or two. Is this what is happening? or is something else slowing you down?
The code below is throwing an OSStatus error 1718449215 which, according to the Audio Queue Reference, represents "The playback data format is unsupported."
The code works correctly if I change the AVFormatKey to be kAudioFormatiLBC or kAudioFormatLinearPCM. Is recording using kAudioFormatMPEG4AAC_HE supported on iOS?
NSDictionary *settings =
[NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithFloat: 32000.0], AVSampleRateKey,
[NSNumber numberWithInt: kAudioFormatMPEG4AAC_HE], AVFormatIDKey,
[NSNumber numberWithInt: 1], AVNumberOfChannelsKey,
[NSNumber numberWithInt: AVAudioQualityMedium], AVEncoderAudioQualityKey,
nil];
NSError *error = nil;
AVAudioRecorder *avRecorder = [[AVAudioRecorder alloc]
initWithURL:url
settings:settings
error:&error];
NSAssert(error.code != 1718449215, #"The playback data format is unsupported.");
The Apple docs, specifically the Multimedia Programming Guide ( http://developer.apple.com/library/ios/#documentation/AudioVideo/Conceptual/MultimediaPG/UsingAudio/UsingAudio.html ), only lists the HE-AAC as a playback format. Regular AAC is listed for both playback and recording. So, it looks like HE-AAC only has partial support.
1) I want to make an Iphone app like Talking Tom. I have downloaded the sample example from :--> https://github.com/zoul/Finch site. It plays fine with given audio file. But I want to play my recorded file with pitch effect. My problem is when I pass my recorded file (Recorded using AVAudioRecorder) the error comes like "Failed to read sound data." please help me why this error occurs. Is there any file format problem when recording file using AVAudioRecorded or any setting problem?
my Setting code is here....
NSArray *dirPaths;
NSString *docsDir;
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = [dirPaths objectAtIndex:0];
NSString *soundFilePath = [docsDir stringByAppendingPathComponent:#"sound.caf"];
soundFileURL = [NSURL fileURLWithPath:soundFilePath];
NSDictionary *recordSettings = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt: AVAudioQualityMedium],AVEncoderAudioQualityKey,
[NSNumber numberWithInt:16],AVEncoderBitRateKey,
[NSNumber numberWithInt: 2],AVNumberOfChannelsKey,
[NSNumber numberWithFloat: 44100.0],AVSampleRateKey,
[NSNumber numberWithInt: kAudioFormatLinearPCM], AVFormatIDKey,
[NSNumber numberWithBool:YES],AVLinearPCMIsBigEndianKey,
nil];
NSError *error = nil;
audioRecorder = [[AVAudioRecorder alloc] initWithURL:soundFileURL settings:recordSettings error:&error];
if(error)
{
NSLog(#"error in AudioRecorder Initializing...: %#", [error localizedDescription]);
}
else
{
//audioRecorder.meteringEnabled = YES;
[audioRecorder prepareToRecord];
}
2)I found another example from http://dirac.dspdimension.com/Dirac3_Technology_Home_Page/Dirac3_Technology.html site.
In this example I can Play my recorded file but too much disturbance comes.
The sound is continuously playing after playing and not able to stop it. Sometimes app crashes when pitch changed.In this example they are using "libDIRAC_iOS4-fat.a" library. so can we use this library ? And how can we stop sound playing.
Is there any way to do this using easily ?
Thanks in advance.
Here I am getting the Exception when I am setting the recordsetting in AvAudioRecord.
The code I written is as:
I created a button named Record and in the action I used the code as...
I imported the audio file sound.caf
[[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryRecord error: nil];
NSDictionary *recordSettings; =[[NSDictionary alloc] initWithObjectsAndKeys:
[NSNumber numberWithFloat: 44100.0], AVSampleRateKey,
[NSNumber numberWithInt: kAudioFormatAppleLossless], AVFormatIDKey,
[NSNumber numberWithInt: 1], AVNumberOfChannelsKey,
[NSNumber numberWithInt: AVAudioQualityMax],
AVEncoderAudioQualityKey,nil];
AVAudioRecorder *newRecorder =[[AVAudioRecorder alloc] initWithURL: soundFileURL settings: recordSettings error: nil];
[recordSettings release];
self.soundRecorder = newRecorder;
[newRecorder release];
Anyone's help will be much appreciated.
Thank you,
Monish Calapatapu.
Remove the line
[newRecorder release];