使用蓝牙设备在AVCaptureSession中录制音频

Question

我正在使用Apple's RosyWriter示例来录制视频和音频。现在我需要使用蓝牙耳机录制音频，但它不适合我。我正在为此工作做以下工作

 captureSession = [[AVCaptureSession alloc] init];
   /*
 * Create audio connection
 */
if(SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0")){
    [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord withOptions:AVAudioSessionCategoryOptionAllowBluetooth error:nil];
    captureSession.usesApplicationAudioSession = true;
    captureSession.automaticallyConfiguresApplicationAudioSession = true;

}
AVCaptureDevice *audioDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio];
//    AVCaptureDeviceInput *audioIn = [[AVCaptureDeviceInput alloc] initWithDevice:[self audioDevice] error:nil];
AVCaptureDeviceInput *audioIn = [[AVCaptureDeviceInput alloc] initWithDevice:audioDevice error:nil];

if ([captureSession canAddInput:audioIn])
    [captureSession addInput:audioIn];

我也遵循了question

Answer 1

我可以通过更改下面的音频输出设置来完成此操作。

_audioCompressionSettings = [[audioOut recommendedAudioSettingsForAssetWriterWithOutputFileType:AVFileTypeQuickTimeMovie] copy];