How to get preview buffer of MediaCapture - Universal app

Question

In Windows phone silverlight, I use PhotoCamera to get buffer frame when start preview video, in universal app I use MediaCapture instead, but I don\'t know how to get previ

Answer 1

My other answer is still valid for Universal Apps targeting Windows 8.1 -- but for those targeting Windows 10 with UWP apps there is a much simpler answer now.

Grabbing a preview frame in UWP is easy and well-documented -- from an existing MediaCapture object it can be done in three lines.

// Get information about the preview
var previewProperties = _mediaCapture.VideoDeviceController.GetMediaStreamProperties(MediaStreamType.VideoPreview) as VideoEncodingProperties;

// Create a video frame in the desired format for the preview frame
VideoFrame videoFrame = new VideoFrame(BitmapPixelFormat.Bgra8, (int)previewProperties.Height, (int)previewProperties.Width);

// Grave a preview frame        
VideoFrame previewFrame = await _mediaCapture.GetPreviewFrameAsync(videoFrame);