/// <summary>
/// Saves a thumbnail of the video
/// </summary>
private void SaveThumbnail()
{
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
var w = (int)_videoCaptureDevice.PreviewResolution.Width;
var h = (int)_videoCaptureDevice.PreviewResolution.Height;
var argbPx = new Int32[w * h];
_videoCaptureDevice.GetPreviewBufferArgb(argbPx);
var wb = new WriteableBitmap(w, h);
argbPx.CopyTo(wb.Pixels, 0);
wb.Invalidate();
using (var isoStore = IsolatedStorageFile.GetUserStoreForApplication())
{
var fileName = _isoVideoFileName + ".jpg";
if (isoStore.FileExists(fileName))
{
isoStore.DeleteFile(fileName);
}
var file = isoStore.CreateFile(fileName);
wb.SaveJpeg(file, w, h, 0, 20);
file.Close();
}
});
}