protected override async void OnActivated(EventArgs e)
{
var capture = new MediaCapture();
await capture.InitializeAsync();
var preview = new CapturePreview(capture);
Preview.Source = preview;
await preview.StartAsync();
}
private void StartPreview(GraphicsCaptureItem item)
{
PreviewContainerGrid.RowDefinitions[1].Height = new GridLength(2, GridUnitType.Star);
CapturePreviewGrid.Visibility = Visibility.Visible;
CaptureInfoTextBlock.Text = item.DisplayName;
var compositor = Window.Current.Compositor;
_preview?.Dispose();
_preview = new CapturePreview(_device, item);
var surface = _preview.CreateSurface(compositor);
_previewBrush.Surface = surface;
_preview.StartCapture();
StartRecordingButton.IsEnabled = true;
}
protected override async void OnActivated(EventArgs e)
{
if (m_initialized)
{
return; // Already initialized
}
m_initialized = true;
var capture = new MediaCapture();
await capture.InitializeAsync(new MediaCaptureInitializationSettings
{
StreamingCaptureMode = StreamingCaptureMode.Video // No audio
});
var preview = new CapturePreview(capture);
Preview.Source = preview;
await preview.StartAsync();
}
protected override async void OnActivated(EventArgs e)
{
if (m_initialized)
{
return; // Already initialized
}
m_initialized = true;
var capture = new MediaCapture();
await capture.InitializeAsync(new MediaCaptureInitializationSettings
{
StreamingCaptureMode = StreamingCaptureMode.Video // No audio
});
var preview = new CapturePreview(capture);
Preview.Source = preview;
await preview.StartAsync();
}
public async Task StartPreviewAsync()
{
if (IsPreviewing)
{
return;
}
try
{
mediaCapture = new MediaCapture();
await mediaCapture.InitializeAsync();// there will throw an exception if there no camera device.
mediaCapture.Failed += MediaCapture_Failed;
displayRequest.RequestActive();
DisplayInformation.AutoRotationPreferences = DisplayOrientations.Landscape;
}
catch (Exception e)// it will throw exception if there no camera device.
{
await CleanupCameraAsync();
Debug.WriteLine(e.Message + "++++45");
return;
}
try
{
capturePreview = new CapturePreview(mediaCapture);
//if (mediaCapture.VideoDeviceController.)
//{
// mediaCapture.CaptureDeviceExclusiveControlStatusChanged += MediaCapture_CaptureDeviceExclusiveControlStatusChanged;
//}
await capturePreview.StartAsync();// it will raise MediaCapture Failed event when camera is used by other application.
_isPreviewing = true;
}
catch (Exception e)// it will throw exception if camera device is used by other application.
{
Debug.WriteLine(e.Message + "+++62");
}
}
