/// <summary>
/// Captures the currently displayed video image and returns a GDI bitmap.
/// </summary>
/// <returns>The GDI bitmap copied from the video renderer.</returns>
public ConfiguredTaskAwaitable <Bitmap> CaptureBitmapAsync() => Task.Run(async() =>
{
Bitmap retrievedBitmap = null;
// Since VideoView might be hosted on a different dispatcher,
// we use the custom InvokeAsync method
await VideoView?.InvokeAsync(() =>
{
var source = VideoView?.Source?.Clone() as BitmapSource;
if (source == null)
{
return;
}
source.Freeze();
var encoder = new BmpBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(source));
var stream = new MemoryStream();
encoder.Save(stream);
stream.Position = 0;
retrievedBitmap = new Bitmap(stream);
});
return(retrievedBitmap);
}).ConfigureAwait(true);
