AVCaptureSession addInput 导致背景音频出现故障

Question

我正在制作一个视频捕获 iOS 应用程序，我希望能够在允许播放背景音乐的同时从麦克风录制音频。我可以做所有这一切，但每当相机的视图进入和退出前景时，背景音频就会跳过（短暂暂停）。我已将错误隔离到 AVCaptureSession addInput:

AVCaptureSession session = [[AVCaptureSession alloc] init];
session.automaticallyConfiguresApplicationAudioSession = NO;

AVCaptureDevice *audioDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio];
AVCaptureDeviceInput *audioDeviceInput = [AVCaptureDeviceInput deviceInputWithDevice:audioDevice error:nil];

// this line causes the background music to skip
[session addInput:audioDeviceInput];

如何防止添加麦克风输入影响背景音频？

fyi - 在 didFinishLaunchingWithOptions 我设置了 AVAudioSession 类别：

[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord
                                 withOptions:AVAudioSessionCategoryOptionMixWithOthers | AVAudioSessionCategoryOptionDefaultToSpeaker
                                       error:nil];

Answer 1

显然没有解决方法。 https://forums.developer.apple.com/message/74778#74778

AVCaptureSession addInput 导致背景音频出现故障

AVCaptureSession addInput causing glitch in background audio

ios

objective-c

avfoundation

avcapturesession

avaudiosession