I use the official api to output the raw file. when I transfer it to my mac, it is very dark. But if I shot with iOS original camera app, it is brighter. This is how I save the proraw file to photo library let creationRequest = PHAssetCreationRequest.forAsset() creationRequest.addResource(with: .photo, data: photo.compressedData, options: nil) // Save the RAW (DNG) file an alternate resource for the Photos asset. let options = PHAssetResourceCreationOptions() ////////options.shouldMoveFile = true creationRequest.addResource(with: .alternatePhoto, fileURL: photo.rawFileURL, options: options)

Now I use AVFoundation framework to get the photo output, but the image aspect ratio is 4:3. But according to the Camera app in the iPhone 13 Pro, it has server image aspect ratio: 4:3, 16:9 and 1:1 when take the proraw image. So how can I get the 1:1, 16:9 aspect ratio proraw image? After I do some research, I find that no matter you use which kinds of camera in the iPhone 11, 12, 13, 14, 15 or Pro, the result image is always 4:3, 1:1 and 16:9 come from the 4:3 cropping. If it is true, how can I crop the proraw file without any data lossing? My developer environment: iPhone 13 Pro iOS 16.7 xcode 14.3.1 This is the session configuration code for the camera device configuration. session.beginConfiguration() /* Do not create an AVCaptureMovieFileOutput when setting up the session because Live Photo is not supported when AVCaptureMovieFileOutput is added to the session. */ session.sessionPreset = .photo // Add video input. do { var defaultVideoDevice: AVCaptureDevice? if let backCameraDevice = AVCaptureDevice.default(.builtInWideAngleCamera, for: .video, position: .back) { // If a rear dual camera is not available, default to the rear wide angle camera. defaultVideoDevice = backCameraDevice } else if let frontCameraDevice = AVCaptureDevice.default(.builtInWideAngleCamera, for: .video, position: .front) { // If the rear wide angle camera isn't available, default to the front wide angle camera. defaultVideoDevice = frontCameraDevice } guard let videoDevice = defaultVideoDevice else { print("Default video device is unavailable.") setupResult = .configurationFailed session.commitConfiguration() return } let videoDeviceInput = try AVCaptureDeviceInput(device: videoDevice) if session.canAddInput(videoDeviceInput) { session.addInput(videoDeviceInput) self.videoDeviceInput = videoDeviceInput } else { print("Couldn't add video device input to the session.") setupResult = .configurationFailed session.commitConfiguration() return } } catch { print("Couldn't create video device input: \(error)") setupResult = .configurationFailed session.commitConfiguration() return } // check the lens list let camerasOptions = videoDeviceDiscoverySession.devices var availableCameras: [AVCaptureDevice.DeviceType] = [] if camerasOptions.isEmpty { print("no camera devices") } else { for camera in camerasOptions { if camera.deviceType == .builtInUltraWideCamera || camera.deviceType == .builtInWideAngleCamera || camera.deviceType == .builtInTelephotoCamera { if !availableCameras.contains(camera.deviceType) { availableCameras.append(camera.deviceType) } } } } DispatchQueue.main.async { self.lensList = availableCameras } // Add the photo output. if session.canAddOutput(photoOutput) { session.addOutput(photoOutput) photoOutput.isHighResolutionCaptureEnabled = true photoOutput.maxPhotoQualityPrioritization = .quality print(photoOutput.isAppleProRAWSupported) // Use the Apple ProRAW format when the environment supports it. photoOutput.isAppleProRAWEnabled = photoOutput.isAppleProRAWSupported DispatchQueue.main.async { self.isSupportAppleProRaw = self.photoOutput.isAppleProRAWSupported } } else { print("Could not add photo output to the session") setupResult = .configurationFailed session.commitConfiguration() return } session.commitConfiguration()