在Windows 10内幕预览中与CameraCaptureUi一起使用的内容

Question

如何在Windows 10内幕预览中使用默认的相机应用程序？

Answer 1

初始化相机

Debug.WriteLine("InitializeCameraAsync");

            if (_mediaCapture == null)
            {
                // Attempt to get the front camera if one is available, but use any camera device if not
                var cameraDevice = await FindCameraDeviceByPanelAsync(Windows.Devices.Enumeration.Panel.Front);

                if (cameraDevice == null)
                {
                    Debug.WriteLine("No camera device found!");
                    return;
                }

                // Create MediaCapture and its settings
                _mediaCapture = new MediaCapture();

                // Register for a notification when video recording has reached the maximum time and when something goes wrong
                _mediaCapture.RecordLimitationExceeded += MediaCapture_RecordLimitationExceeded;
                _mediaCapture.Failed += MediaCapture_Failed;

                var settings = new MediaCaptureInitializationSettings { VideoDeviceId = cameraDevice.Id };

                // Initialize MediaCapture
                try
                {
                    await _mediaCapture.InitializeAsync(settings);
                    _isInitialized = true;
                }
                catch (UnauthorizedAccessException)
                {
                    Debug.WriteLine("The app was denied access to the camera");
                }
                catch (Exception ex)
                {
                    Debug.WriteLine("Exception when initializing MediaCapture with {0}: {1}", cameraDevice.Id, ex.ToString());
                }

                // If initialization succeeded, start the preview
                if (_isInitialized)
                {
                    // Figure out where the camera is located
                    if (cameraDevice.EnclosureLocation == null || cameraDevice.EnclosureLocation.Panel == Windows.Devices.Enumeration.Panel.Unknown)
                    {
                        // No information on the location of the camera, assume it's an external camera, not integrated on the device
                        _externalCamera = true;
                    }
                    else
                    {
                        // Camera is fixed on the device
                        _externalCamera = false;

                        // Only mirror the preview if the camera is on the front panel
                        _mirroringPreview = (cameraDevice.EnclosureLocation.Panel == Windows.Devices.Enumeration.Panel.Front);
                    }

使用图片

await _mediaCapture.CapturePhotoToStreamAsync(ImageEncodingProperties.CreateJpeg(), stream);