I made cut and paste of the code below about how to use CameraPreviewImageSource and access to preview buffer frames, but do not work and it seems the frame buffer size is 0x0 reading the value of IImageSize parameter of OnPreviewFrameAvailable event.
How to get preview buffer of MediaCapture - Universal app
protected override void OnNavigatedTo(NavigationEventArgs e)
{
InitializeAsync();
}
public async void InitializeAsync()
{
_cameraPreviewImageSource = new CameraPreviewImageSource();
await _cameraPreviewImageSource.InitializeAsync(string.Empty);
var properties = await _cameraPreviewImageSource.StartPreviewAsync();
var width = 640.0;
var height = 480;
_writeableBitmap = new WriteableBitmap((int)width, (int)height);
_writeableBitmapRenderer = new WriteableBitmapRenderer(_cameraPreviewImageSource, _writeableBitmap);
Initialized = true;
_cameraPreviewImageSource.PreviewFrameAvailable += OnPreviewFrameAvailable;
}
private async void OnPreviewFrameAvailable(IImageSize args)
{
System.Diagnostics.Debug.WriteLine("ww:"+args.Size.Width+" hh:"+args.Size.Height);
// Prevent multiple rendering attempts at once
if (Initialized && !_isRendering)
{
_isRendering = true;
try
{
await _writeableBitmapRenderer.RenderAsync();
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("\n\n"+ex.Message);
System.Diagnostics.Debug.WriteLine(ex.StackTrace);
}
_isRendering = false;
}
}
Capabilities (webcam & microphone) on Package.appxmanifest has been selected
Implementing CameraPreviewImageSource on a Silverlight app works great!
