I need to capture 4k photos with 4:3 ratio from the camera. I can do this, but i want to disable video stabilization. I can disable video stabilization using the AVCaptureSessionPresetHigh preset. But AVCaptureSessionPresetHigh gives me a 16:9 photo with the surroundings cropped. Unfortunately, the 16:9 ratio does not solve my needs.
When I run the session using the AVCaptureSessionPresetPhoto preset and adding AVCapturePhotoOutput, I cannot turn off image stabilization.
self.capturePhotoOutput = AVCapturePhotoOutput.init()
self.captureDevice = AVCaptureDevice.default(AVCaptureDevice.DeviceType.builtInWideAngleCamera
, for: AVMediaType.video, position: .back)
do {
let input = try AVCaptureDeviceInput(device: self.captureDevice!)
self.captureSession = AVCaptureSession()
self.captureSession?.beginConfiguration()
self.captureSession?.sessionPreset = .photo
self.captureSession?.addInput(input)
if ((captureSession?.canAddOutput(capturePhotoOutput!)) != nil) {
captureSession?.addOutput(capturePhotoOutput!)
}
if let connection = capturePhotoOutput?.connection(with: .video) {
if connection.isVideoStabilizationSupported {
connection.preferredVideoStabilizationMode = .off
}
}
DispatchQueue.main.async { [self] in
self.capturePhotoOutput?.isHighResolutionCaptureEnabled = true
self.videoPreviewLayer = AVCaptureVideoPreviewLayer(session: self.captureSession!)
self.videoPreviewLayer?.videoGravity = .resizeAspectFill
self.videoPreviewLayer?.connection?.videoOrientation = .portrait
self.videoPreviewLayer?.frame = self.previewView.layer.frame
self.previewView.layer.insertSublayer(self.videoPreviewLayer!, at: 0)
}
self.captureSession?.commitConfiguration()
self.captureSession?.startRunning()
}
}
@objc private func handleTakePhoto(){
let photoSettings = AVCapturePhotoSettings()
if let photoPreviewType = photoSettings.availablePreviewPhotoPixelFormatTypes.first {
photoSettings.previewPhotoFormat = [kCVPixelBufferPixelFormatTypeKey as String:photoPreviewType]
photoSettings.isAutoStillImageStabilizationEnabled = false
capturePhotoOutput?.capturePhoto(with: photoSettings, delegate: self)
}
}
func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {
if let dataImage = photo.fileDataRepresentation() {
print(UIImage(data: dataImage)?.size as Any)
let dataProvider = CGDataProvider(data: dataImage as CFData)
let cgImageRef: CGImage! = CGImage(jpegDataProviderSource: dataProvider!, decode: nil, shouldInterpolate: true, intent: .defaultIntent)
let image = UIImage(cgImage: cgImageRef, scale: 1.0, orientation: rotateImage(orientation: currentOrientation))
} else {
print("some error here")
}
}
As a temporary solution, I added only AVCaptureVideoDataOutput to the session without adding AVCapturePhotoOutput, and I can capture in 4:3 format with the captureOutput(_ output: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) function. However, this time I cannot get a 4K image.
In short, I need to turn off video stabilization in a session with AVCapturePhotoOutput added.
self.captureDevice = AVCaptureDevice.default(AVCaptureDevice.DeviceType.builtInWideAngleCamera
, for: AVMediaType.video, position: .back)
do {
let input = try AVCaptureDeviceInput(device: self.captureDevice!)
self.captureSession = AVCaptureSession()
self.captureSession?.beginConfiguration()
self.captureSession?.sessionPreset = .photo
self.captureSession?.addInput(input)
videoDataOutput = AVCaptureVideoDataOutput()
videoDataOutput?.videoSettings = [
kCVPixelBufferPixelFormatTypeKey as String: Int(kCVPixelFormatType_32BGRA)
]
videoDataOutput?.setSampleBufferDelegate(self, queue: DispatchQueue(label: "videoQueue"))
if ((captureSession?.canAddOutput(videoDataOutput!)) != nil) {
captureSession?.addOutput(videoDataOutput!)
}
/* If I cancel the comment line, video stabilization is enabled.
if ((captureSession?.canAddOutput(capturePhotoOutput!)) != nil) {
captureSession?.addOutput(capturePhotoOutput!)
}
*/
DispatchQueue.main.async { [self] in
self.videoPreviewLayer = AVCaptureVideoPreviewLayer(session: self.captureSession!)
self.videoPreviewLayer?.videoGravity = .resizeAspectFill
self.videoPreviewLayer?.connection?.videoOrientation = .portrait
self.videoPreviewLayer?.frame = self.previewView.layer.frame
self.previewView.layer.insertSublayer(self.videoPreviewLayer!, at: 0)
}
self.captureSession?.commitConfiguration()
self.captureSession?.startRunning()
}
}
@objc private func handleTakePhoto(){
takePicture = true
}
func captureOutput(_ output: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) {
if !takePicture {
return //we have nothing to do with the image buffer
}
//try and get a CVImageBuffer out of the sample buffer
guard let cvBuffer = CMSampleBufferGetImageBuffer(sampleBuffer) else {
return
}
let rect = CGRect(x: 0, y: 0, width: CVPixelBufferGetWidth(cvBuffer), height: CVPixelBufferGetHeight(cvBuffer))
let ciImage = CIImage.init(cvImageBuffer: cvBuffer)
let ciContext = CIContext()
let cgImage = ciContext.createCGImage(ciImage, from: rect)
guard cgImage != nil else {return }
let uiImage = UIImage(cgImage: cgImage!)
}
