HoloLens Error -2147467259

When working with camera stream in HoloLens, you might get ValidationCaptureResult error code –2147467259. Typically you can check this in method like following one:

void onStartVideoCapture(VideoCapture.VideoCaptureResult result)
{
        if (result.success)
        {
        }
}

This is an none documented error, which basically indicates, that the camera resource is in use. HoloLens camera can be in use if you have started an application, which streams a video of the device. In that case the running app will use camera and your application, which is preventing your application running on HoloLens to access same hardware resource.