/// <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(); } }); }