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Question

가능한 중복 시작하기 전에 3 초 지연을 보여주는 avaudiorecorder :
Delay in Recording using avaudiorecorder

내가 iOS5를를 사용 Xcode4에 응용 프로그램을 실행하고를하고, 문제에 직면하는 것은 3의 지연이있다 초를 눌러 실제 녹음을 시작하십시오. 나는 모든 것을 찾고 havent는 나를 위해 좋은 해결책을 찾았다.

여기에 코드

-(void) recordBtnClick:(UIButton *)sender 

    {  

     if (!recordBtn && !playBtn) 
     { 
      NSLog(@"recording pressed"); 

      [recordButton setBackgroundImage:[UIImage imageNamed:@"stop.png"]    forState:UIControlStateNormal]; 

      recordBtn=YES; 

     //startRecording; 

     // Init audio with record capability 
     AVAudioSession *audioSession = [AVAudioSession sharedInstance]; 
     [audioSession setCategory:AVAudioSessionCategoryRecord error:nil]; 

     NSMutableDictionary *recordSettings = [[NSMutableDictionary alloc] initWithCapacity:10]; 

    if(recordEncoding == ENC_PCM) 
     { 
     [recordSettings setObject:[NSNumber numberWithInt: kAudioFormatLinearPCM] forKey: AVFormatIDKey]; 
     [recordSettings setObject:[NSNumber numberWithFloat:16000.0] forKey: AVSampleRateKey]; 
     [recordSettings setObject:[NSNumber numberWithInt:2] forKey:AVNumberOfChannelsKey]; 
     [recordSettings setObject:[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey]; 
     [recordSettings setObject:[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsBigEndianKey]; 
     [recordSettings setObject:[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsFloatKey]; 
    } 
    else 
    { 
     NSNumber *formatObject; 

     switch (recordEncoding) { 
      case (ENC_AAC): 
       formatObject = [NSNumber numberWithInt: kAudioFormatMPEG4AAC]; 
       break; 
      case (ENC_ALAC): 
       formatObject = [NSNumber numberWithInt: kAudioFormatAppleLossless]; 
       break; 
      case (ENC_IMA4): 
       formatObject = [NSNumber numberWithInt: kAudioFormatAppleIMA4]; 
       break; 
      case (ENC_ILBC): 
       formatObject = [NSNumber numberWithInt: kAudioFormatiLBC]; 
       break; 
      case (ENC_ULAW): 
       formatObject = [NSNumber numberWithInt: kAudioFormatULaw]; 
       break; 
      default: 
       formatObject = [NSNumber numberWithInt: kAudioFormatAppleIMA4]; 
     } 

     [recordSettings setObject:formatObject forKey: AVFormatIDKey]; 
     [recordSettings setObject:[NSNumber numberWithFloat:44100.0] forKey: AVSampleRateKey]; 
     [recordSettings setObject:[NSNumber numberWithInt:2] forKey:AVNumberOfChannelsKey]; 
     [recordSettings setObject:[NSNumber numberWithInt:12800] forKey:AVEncoderBitRateKey]; 
     [recordSettings setObject:[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey]; 
     [recordSettings setObject:[NSNumber numberWithInt: AVAudioQualityHigh] forKey: AVEncoderAudioQualityKey]; 
    } 
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
    NSString *recDir = [paths objectAtIndex:0]; 
    NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/audio%d.wav",recDir,nextCount]]; 

    NSError *error = nil; 
    audioRecorder = [[ AVAudioRecorder alloc] initWithURL:url settings:recordSettings error:&error]; 
    audioRecorder.delegate=self; 
    if(!audioRecorder){ 
     NSLog(@"recorder: %@ %d %@", [error domain], [error code], [[error userInfo] description]); 
     UIAlertView *alert = 
     [[UIAlertView alloc] initWithTitle: @"Warning" 
            message: [error localizedDescription] 
            delegate: nil 
         cancelButtonTitle:@"OK" 
         otherButtonTitles:nil]; 
     [alert show]; 
     [alert release]; 
     return; 
    } 

    //prepare to record 
    [audioRecorder prepareToRecord]; 
    //audioRecorder.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; 
    } 
    [audioRecorder recordForDuration:(NSTimeInterval) 25]; 


    NSLog(@"recording"); 
    // ---------------- record code finished ----------------// 
    }else{ 
    [recordButton setBackgroundImage:[UIImage imageNamed:@"record.png"] forState:UIControlStateNormal]; 
    recordBtn=NO; 
    [audioRecorder stop]; 
    AVAudioSession *audioSession = [AVAudioSession sharedInstance]; 
    [audioSession setCategory:AVAudioSessionCategoryPlayback error:nil]; 


    } 

} 

Answer 1

에게 있습니다 수행 기록하고 앱의 녹화 버튼을 표시하기 전에 그 전에 필요한 모든 초기화 준비합니다.