AvAudioRecorder recording file corrupted randomly

Question

I face issue with AvAudioRecorder, create corrupted file on random check.

It create file with length 24kb, which is not occurred all time, but randomly found file is corrupted.

I also checked below link for references, as i have similar issue, but it does not worked for me.

AVAudioRecorder Record method returns NO at random times

Seemingly random file corruption using AVAudioRecorder (Sometimes the file can't be played back) - iOS

below is complete functionality code.

-(IBAction)btnRecordClick:(id)sender
{
    [PlayingTimer invalidate];
    PlayingTimer = nil;

    if(isPaused==NO)
    {
        AVAudioSession *audioSession = [AVAudioSession sharedInstance];
        NSError *err = nil;
        [audioSession setCategory :AVAudioSessionCategoryPlayAndRecord 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;
        }

        //*******Working well with .wav,.caf and .mp4 files *****************
        recordSetting = [[NSMutableDictionary alloc] init];

        //this is for .wav and .caf file
        //this is for .mp4 file for iPhone 3GS/iPhone 4
        [recordSetting setValue: [NSNumber numberWithInt:kAudioFormatMPEG4AAC] 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];

        self.strMessage = @"";
        self.strMessageType = [NSString stringWithFormat:@"Audio Message"];
        self.strFileName = [NSString stringWithFormat:@"%@.mp4", [_globalmodel stringUniqueID]];
        // NSLog(@"FileName :%@",self.strFileName);

        self.strUniqueRef = [NSString stringWithFormat:@"%@",[_globalmodel stringUniqueID]];

        NSString *soundPath;//=[NSString alloc];
        soundPath = [NSString stringWithFormat:@"%@/%@", DOCUMENTS_FOLDER,self.strFileName] ;
        NSURL *url1 = [NSURL fileURLWithPath:soundPath];

        // NSLog(@"Recording Path:%@",url1);
        err = nil;
        recorder = [[ AVAudioRecorder alloc] initWithURL:url1 settings:recordSetting error:&err];

        if(!recorder)
        {
            // NSLog(@"recorder: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
            UIAlertView *alert =[[UIAlertView alloc] initWithTitle: @"My Easy Media"
                                                           message: @"The Recording format is not supported on your device!"
                                                          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 record];
        _isRecordingStarted = YES;

        // SET TIMER // START TIMER
        timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(EndRecording:) userInfo:nil repeats:YES];

        // END TO SETTING TIMER
        timerDisplayRight.hidden = NO;
        timerDisplayLeft.hidden = NO;
        timerDisplayRight.text = [NSString stringWithFormat:@"%02d:%02d", intMimute,-- intSecond]; 
        timerDisplayLeft.text = [NSString stringWithFormat:@"00:00"];
        progressView.progress = 0.0;
    }
    else
    {
        isPaused=NO;
        [recorder record];   
        _isRecordingStarted = YES;
        [btnReview setEnabled:NO];

        timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(EndRecording:) userInfo:nil repeats:YES];
        timerDisplayRight.hidden = NO;
        timerDisplayLeft.hidden = NO;
    }

    timerDisplayRight.text = [NSString stringWithFormat:@"%02d:%02d", intMimute,-- intSecond];
}


-(IBAction)btnPauseClick:(id)sender
{
    // NSLog(@"Pause Button of ActionSheet Clicked");
    [timer invalidate];
    timer = nil;
    isPaused=YES;
    [recorder pause];

    [btnPause setEnabled:NO];
    [btnRecord setEnabled:YES];
    [btnStop setEnabled:YES];
}


-(IBAction)btnStopClick:(id)sender
{
    // NSLog(@"Stop Button of ActionSheet Clicked");
    [recorder stop];

    progressView.progress = 1.0;
    // NSLog(@"Total Recording Secomd : %d", totalRecordingSecond);
    finalRecordingSecond = totalRecordingSecond;

    [btnStop setEnabled:NO];
    [btnReview setEnabled:YES];
    [btnRecord setEnabled:YES];
    [btnPause setEnabled:NO];

    timerDisplayRight.text = [NSString stringWithFormat:@"%02d:%02d", (totalRecordingSecond/60), (totalRecordingSecond % 60) ];
    timerDisplayLeft.text = [NSString stringWithFormat:@"00:00"];

    [timer invalidate];
    timer = nil;

    // REINITIALIZE TIMER VARIABLES...
    intMimute =  5;
    intTotalTime = (60 * intMimute);   
    intSecond = intTotalTime / intMimute;
    intMimute--;       

    // REINITIALIZE TIMER VARIABLES...       
    _isRecordingStarted = NO;
}

Please help. Once I start recording and after near about 10 to 15 second, tap on stop.

Answer 1

I think it happen when any run any process in background in separate thread, same time when recording.