swift - Camera AVFondation set aspect ration or resolution

Question

I use AVFoundation to take photo but i need taked photo be 1920x1440 or if this resolution not supported on device i need to image be 4:3 aspect ratio. How i do this? My code for camera:

Camera initializer:

func initCamera()
{
    captureSession = AVCaptureSession()
    videoPreviewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
    videoPreviewLayer.frame = self.cameraView.frame
    videoPreviewLayer.videoGravity = .resizeAspectFill
    
    guard let backCamera = AVCaptureDevice.default(for: AVMediaType.video) else {
        print("Unable to access back camera!")
        return
    }
    backCamera.formats
    self.chaprerDevice = backCamera
    do {
        cameraInput = try AVCaptureDeviceInput(device: backCamera)
        stillImageOutput = AVCapturePhotoOutput()
        if captureSession.canAddInput(cameraInput) && captureSession.canAddOutput(stillImageOutput) {
            captureSession?.beginConfiguration()
            captureSession.sessionPreset = .photo
            captureSession.addInput(cameraInput)
            captureSession.addOutput(stillImageOutput)
            captureSession?.commitConfiguration()
            setupLivePreview()
        }
    } catch let error  {
        print("Error Unable to initialize back camera:  (error.localizedDescription)")
    }
}
 func setupLivePreview() {
    
    videoPreviewLayer.connection?.videoOrientation = .landscapeRight
    self.cameraView.layer.addSublayer(videoPreviewLayer)
    
    DispatchQueue.global(qos: .userInitiated).async { [weak self] in
        self?.captureSession.startRunning()
        DispatchQueue.main.async {
            self?.videoPreviewLayer.frame = self?.cameraView.bounds ?? UIScreen.main.bounds
        }
    }
}

Function called when to take a picture:

    func takePhoto {
       let settings = AVCapturePhotoSettings(format: [AVVideoCodecKey:AVVideoCodecType.jpeg])
        settings.isAutoStillImageStabilizationEnabled = true
        settings.flashMode = flash
        let pbpf = settings.__availablePreviewPhotoPixelFormatTypes[0]
    
        settings.previewPhotoFormat = [
            kCVPixelBufferPixelFormatTypeKey as String : pbpf,
            kCVPixelBufferWidthKey as String : 1920,
            kCVPixelBufferHeightKey as String : 1440]

    stillImageOutput.capturePhoto(with: settings, delegate: self)
    
}

question from:https://stackoverflow.com/questions/65887026/camera-avfondation-set-aspect-ration-or-resolution

Answer 1

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