AVAudioRecorder won't record IF movie was previously recorded & played

Question

My iPhone app uses \"AVAudioRecorder\" to make voice recordings. It also uses \"UIImagePickerController\" to record movies and \"MPMoviePlayerController\" to play movies.

Answer 1

I was having the same issue. Before I fixed the issue, my recording/playback code was like this:

Start Recording Function

- (BOOL) startRecording {   
@try {
    NSDictionary *recordSetting = [[NSDictionary alloc] initWithObjectsAndKeys:
[NSNumber numberWithInt: kAudioFormatAppleLossless], AVFormatIDKey, [NSNumber numberWithFloat: 44100.0], AVSampleRateKey, [NSNumber numberWithInt: 1], AVNumberOfChannelsKey,  [NSNumber numberWithInt: AVAudioQualityMax], AVEncoderAudioQualityKey, nil];

        NSString *documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
        NSString *soundFilePath = [documentsPath stringByAppendingPathComponent:@"recording.caf"];

        if(audioRecorder != nil) {
            [audioRecorder stop];
            [audioRecorder release];
            audioRecorder = nil;
        }

        NSError *err = nil;
        audioRecorder = [[AVAudioRecorder alloc] initWithURL:soundFileURL settings:recordSetting error:&err];
        [soundFileURL release];
        [recordSetting release];
        if(!audioRecorder || err){
            NSLog(@"recorder initWithURL: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
            return NO;
        }

        [audioRecorder peakPowerForChannel:8];
        [audioRecorder updateMeters];
        audioRecorder.meteringEnabled = YES;
        [audioRecorder record];
    }
    @catch (NSException * e) {
        return NO;
    }

    recording = YES;
    return YES;
}

Stop Recording Function

- (BOOL) stopRecording {
    @try {
        [audioRecorder stop];
        [audioRecorder release];
        audioRecorder = nil;

        recording = NO;
    }
    @catch (NSException * e) {
        return NO;
    }

    return YES;
}

Start Playing Function

- (BOOL) startPlaying {
    @try {
        NSString *documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
        NSString *soundFilePath = [documentsPath stringByAppendingPathComponent:@"recording.caf"];      NSURL * soundFileURL = [[NSURL alloc] initFileURLWithPath: soundFilePath];
        NSError *err = nil;

        if (audioPlayer) {
            [audioPlayer release];
            audioPlayer = nil;
        }

        audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:soundFileURL error: &err];
        [soundFileURL release];
        if (!audioPlayer || err) {
            NSLog(@"recorder: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
            return NO;
        }

        [audioPlayer prepareToPlay];
        [audioPlayer setDelegate: self];
        [audioPlayer play];

        playing = YES;
    }
    @catch (NSException * e) {
        return NO;
    }

    return YES;
}

Stop Playing Function

- (BOOL) stopPlaying {
    @try {
        [audioPlayer stop];
        [audioPlayer release];
        audioPlayer = nil;

        playing = NO;
    }
    @catch (NSException * e) {
        return NO;
    }

    return YES;
}

I fixed the recording issue after playing a captured video, the code is as follows:

- (BOOL) startRecording {   
    @try {
        AVAudioSession *session = [AVAudioSession sharedInstance];
        [session setCategory:AVAudioSessionCategoryRecord error:nil];

        // rest of the recording code is the same .
}

- (BOOL) stopRecording {
    @try {
        AVAudioSession *session = [AVAudioSession sharedInstance];
        [session setCategory:AVAudioSessionCategoryPlayback error:nil];

    // rest of the code is the same
}

- (BOOL) startPlaying {
    @try {
        AVAudioSession *session = [AVAudioSession sharedInstance];
        [session setCategory:AVAudioSessionCategoryPlayback error:nil];

    // rest of the code is the same. 
}

- (BOOL) stopPlaying {
    // There is no change in this function
}