反转的facetime摄像头被反转

Question

我使用gpuimage构建了一个摄影应用程序。但当我选择前置摄像头时，摄像头图片出现在背面是反转的(左、右)代码：

 stillCamera = [[GPUImageStillCamera alloc] initWithSessionPreset:AVCaptureSessionPreset640x480 cameraPosition:AVCaptureDevicePositionBack]; 
stillCamera.outputImageOrientation = UIInterfaceOrientationPortrait;
filter = [[GPUImageRGBFilter alloc] init];

[stillCamera addTarget:filter];
GPUImageView *filterView = (GPUImageView *)self.view;
[filter addTarget:filterView];

[stillCamera startCameraCapture];

谁能告诉我我遇到了什么问题？非常感谢！

Answer 1

试试这个。

stillCamera = [[GPUImageStillCamera alloc] initWithSessionPreset:AVCaptureSessionPreset640x480 cameraPosition:AVCaptureDevicePositionBack]; 
stillCamera.outputImageOrientation = UIInterfaceOrientationPortrait;
stillCamera.horizontallyMirrorFrontFacingCamera = NO;
stillCamera.horizontallyMirrorRearFacingCamera = NO;

filter = [[GPUImageRGBFilter alloc] init];

[stillCamera addTarget:filter];
GPUImageView *filterView = (GPUImageView *)self.view;
[filter addTarget:filterView];

[stillCamera startCameraCapture];

Answer 2

试试这个：

[filterView setInputRotation:kGPUImageFlipHorizonal atIndex:0];

Answer 3

我认为你可以很容易地改变最终的图像：

UIImage *finalImage = //image from the camera

UIImage * flippedImage = [UIImage imageWithCGImage:finalImage.CGImage scale:finalImage.scale orientation:UIImageOrientationLeftMirrored];