AVCaptureSession addInput导致背景音频出现故障 [英] AVCaptureSession addInput causing glitch in background audio

问题描述

我正在制作视频捕捉iOS应用程序，我希望能够录制麦克风的音频，同时允许播放背景音乐。我可以做所有这些，但只要相机的视图进入和退出前景，背景音频就会跳过（暂停）。我已将错误隔离到 AVCaptureSession addInput ：

I'm making a video capturing iOS app and I want to be able to record audio from the microphone while allowing background music to play. I can do all of this but the background audio skips (pauses briefly) whenever the view with the camera enters and exits the foreground. I have isolated the bug to 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？

How can I prevent adding microphone input from affecting the background audio?

fyi - in didFinishLaunchingWithOptions 我设置了AVAudioSession类别：

fyi - in didFinishLaunchingWithOptions I set the AVAudioSession Category:

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

推荐答案

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

Apparently there is no workaround. https://forums.developer.apple.com/message/74778#74778

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