如何修复使用前置摄像头镜像图像捕获图像的问题？ SnapChat似乎可以像WhatsApp和Instagram一样修复它，我该怎么做？ 我真的很想为此找到解决方案...这很烦人...提前致谢
我已经看到从前置摄像头iOS 5.0捕获时总是看到镜像，但它翻转了后置摄像头和正面的图像，这并不能真正解决任何人的问题。 如果有人能帮助我弄清楚如何只翻转前置摄像头图像或任何其他解决方案，那将是伟大的！
import UIKit
import AVFoundation
@available(iOS 10.0, *)
class CameraViewController: UIViewController,AVCaptureVideoDataOutputSampleBufferDelegate {
let photoSettings = AVCapturePhotoSettings()
var audioPlayer = AVAudioPlayer()
var captureSession = AVCaptureSession()
var videoDeviceInput: AVCaptureDeviceInput!
var previewLayer = AVCaptureVideoPreviewLayer()
var frontCamera: Bool = false
var captureDevice:AVCaptureDevice!
var takePhoto = false
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
prepareCamera()
}
func prepareCamera() {
captureSession.sessionPreset = AVCaptureSessionPresetPhoto
if let availableDevices = AVCaptureDeviceDiscoverySession(deviceTypes: [.builtInWideAngleCamera], mediaType: AVMediaTypeVideo, position: .back).devices {
captureDevice = availableDevices.first
beginSession()
}
}
func frontCamera(_ front: Bool){
let devices = AVCaptureDevice.devices()
do{
try captureSession.removeInput(AVCaptureDeviceInput(device:captureDevice!))
}catch{
print("Error")
}
for device in devices!{
if((device as AnyObject).hasMediaType(AVMediaTypeVideo)){
if front{
if (device as AnyObject).position == AVCaptureDevicePosition.front {
captureDevice = device as? AVCaptureDevice
do{
try captureSession.addInput(AVCaptureDeviceInput(device: captureDevice!))
}catch{}
break
}
}else{
if (device as AnyObject).position == AVCaptureDevicePosition.back {
captureDevice = device as? AVCaptureDevice
do{
try captureSession.addInput(AVCaptureDeviceInput(device: captureDevice!))
}catch{}
break
}
}
}
}
}
func beginSession () {
do {
let captureDeviceInput = try AVCaptureDeviceInput(device: captureDevice)
if let previewLayer = AVCaptureVideoPreviewLayer(session: captureSession) {
self.previewLayer = previewLayer
containerView.layer.addSublayer(previewLayer as? CALayer ?? CALayer())
self.previewLayer.frame = self.view.layer.frame
self.previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
previewLayer.connection.videoOrientation = AVCaptureVideoOrientation.portrait
captureSession.startRunning()
let dataOutput = AVCaptureVideoDataOutput()
dataOutput.videoSettings = [(kCVPixelBufferPixelFormatTypeKey as NSString):NSNumber(value:kCVPixelFormatType_32BGRA)]
dataOutput.alwaysDiscardsLateVideoFrames = true
if captureSession.canAddOutput(dataOutput) {
captureSession.addOutput(dataOutput)
photoSettings.isHighResolutionPhotoEnabled = true
photoSettings.isAutoStillImageStabilizationEnabled = true
}
captureSession.commitConfiguration()
let queue = DispatchQueue(label: "com.NightOut.captureQueue")
dataOutput.setSampleBufferDelegate(self, queue: queue)
}
}
@IBAction func takePhoto(_ sender: Any) {
takePhoto = true
photoSettings.isHighResolutionPhotoEnabled = true
photoSettings.isAutoStillImageStabilizationEnabled = true
}
func captureOutput(_ captureOutput: AVCaptureOutput!, didOutputSampleBuffer sampleBuffer: CMSampleBuffer!, from connection: AVCaptureConnection!) {
if takePhoto {
takePhoto = false
if let image = self.getImageFromSampleBuffer(buffer: sampleBuffer) {
let photoVC = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "PhotoVC") as! PhotoPreviewViewController
photoVC.takenPhoto = image
DispatchQueue.main.async {
self.present(photoVC, animated: true, completion: {
self.stopCaptureSession()
})
}
}
}
}
func getImageFromSampleBuffer (buffer:CMSampleBuffer) -> UIImage? {
if let pixelBuffer = CMSampleBufferGetImageBuffer(buffer) {
let ciImage = CIImage(cvPixelBuffer: pixelBuffer)
let context = CIContext()
let imageRect = CGRect(x: 0, y: 0, width: CVPixelBufferGetWidth(pixelBuffer), height: CVPixelBufferGetHeight(pixelBuffer))
if let image = context.createCGImage(ciImage, from: imageRect) {
return UIImage(cgImage: image, scale: UIScreen.main.scale, orientation: .leftMirrored)
}
}
return nil
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
self.captureSession.stopRunning()
}
func stopCaptureSession () {
self.captureSession.stopRunning()
if let inputs = captureSession.inputs as? [AVCaptureDeviceInput] {
for input in inputs {
self.captureSession.removeInput(input)
}
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
@IBAction func DismissButtonAction(_ sender: UIButton) {
UIView.animate(withDuration: 0.1, animations: {
self.DismissButton.transform = CGAffineTransform.identity.scaledBy(x: 0.8, y: 0.8)
}, completion: { (finish) in
UIView.animate(withDuration: 0.1, animations: {
self.DismissButton.transform = CGAffineTransform.identity
})
})
performSegue(withIdentifier: "Segue", sender: nil)
}
}
我自己想通了，这是解决方案：
if captureDevice.position == AVCaptureDevicePosition.back {
if let image = context.createCGImage(ciImage, from: imageRect) {
return UIImage(cgImage: image, scale: UIScreen.main.scale, orientation: .right)
}
}
if captureDevice.position == AVCaptureDevicePosition.front {
if let image = context.createCGImage(ciImage, from: imageRect) {
return UIImage(cgImage: image, scale: UIScreen.main.scale, orientation: .leftMirrored)
}
}
我建议使用没有转换的AVCaptureConnection的本机isVideoMirrored属性。
以下是示例步骤：
- 将当前相机位置保存在自定义相机类中：
private var currentCameraPosition: AVCaptureDevice.Position = .back
-
每次用户旋转相机时，更新
currentCameraPosition -
最后，在您的
capturePhoto()方法中相应地设置isVideoMirrored：guard let connection = stillImageOutput.connection(with: .video) else { return } connection.isVideoMirrored = currentCameraPosition == .front
这将在使用前置摄像头时镜像照片。
使用相同的方法镜像前置摄像头视频：
guard let connection = videoCaptureOutput.connection(with: .video) else { return }
connection.isVideoMirrored = currentCameraPosition == .front
就是这样！
我很久以前就这样做了。我没有随身携带我的系统，但我可以说水平转换您的预览层，它会根据需要显示确切的结果。对于保存和导出，您会在这里找到很多示例。
@IBAction func takePhotoClicked(_ sender: Any) {
let settings = AVCapturePhotoSettings()
//configure settings if needed.
//Need to correct image orientation before moving further
if let photoOutputConnection = photoOutput?.connection(with: .video) {
photoOutputConnection.videoOrientation = orientationHandler.currentInterfaceOrientation()
//For frontCamera settings to capture mirror image
if currentCamera == frontCamera {
photoOutputConnection.automaticallyAdjustsVideoMirroring = false
photoOutputConnection.isVideoMirrored = true
} else {
photoOutputConnection.automaticallyAdjustsVideoMirroring = true
}
}
photoOutput?.capturePhoto(with: settings, delegate: self)
}