//负责从AVCaptureDevice获得输入数据
@property (strong,nonatomic) AVCaptureDeviceInput *captureDeviceInput;
//根据设备输出获得连接
AVCaptureConnection *connection = [self.captureMovieFileOutput connectionWithMediaType:AVMediaTypeVideo];
// 前置摄像头翻转
AVCaptureDevicePosition currentPosition=[[self.captureDeviceInput device] position];
if (currentPosition == AVCaptureDevicePositionUnspecified || currentPosition == AVCaptureDevicePositionFront) {
connection.videoMirrored = YES;
} else {
connection.videoMirrored = NO;
}
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