我遇到一个有关冻结QuickBlox视频中的一对一用户的localCameraView的问题

Question

我在QuickBlox视频中遇到一个与localCameraView有关的问题，每当一个用户打电话给我时，我的LocalCameraView都会先捕获一些视图，然后像冻结一样变成黑色。

@property (strong, nonatomic) IBOutlet UIView *localVideoView;
@property (strong, nonatomic) QBRTCCameraCapture *videoCapture;

QBRTCVideoFormat *videoFormat = [[QBRTCVideoFormat alloc] init];
videoFormat.frameRate = 30;
videoFormat.pixelFormat = QBRTCPixelFormat420f;
videoFormat.width = 640;
videoFormat.height = 480;


self.videoCapture = [[QBRTCCameraCapture alloc] initWithVideoFormat:videoFormat position:AVCaptureDevicePositionFront]; 


self.session.localMediaStream.videoTrack.videoCapture = self.videoCapture;

self.videoCapture.previewLayer.frame = self.localVideoView.bounds;
[self.videoCapture startSession:nil];

[self.localVideoView.layer insertSublayer:self.videoCapture.previewLayer atIndex:0];