Code in Application_Launching method of real-time-filter-demo/RealtimeFilterDemoWP/RealtimeFilterDemo/App.xaml.cs, shown below, may deadlock.

var task = PhotoCaptureDevice.OpenAsync(CameraSensorLocation.Back, resolution).AsTask();
task.Wait();
...
Camera.SetPreviewResolutionAsync(resolution).AsTask().Wait();

This code waits synchronously on Tasks -- mixing synchronous and asynchronous operations is
dangerous, as noted here: http://blog.stephencleary.com/2012/07/dont-block-on-async-code.html

A possible fix is to run the async operation OpenAsync on a threadpool thread using the Task.Run API documented here: https://msdn.microsoft.com/en-us/library/system.threading.tasks.task.run(v=vs.110).aspx

Exit on launch.

In "real-time-filter-demo / RealtimeFilterDemoWindows / RealtimeFilterDemo.Shared / MainPageViewModel.cs"
camera is initialized in following command:
await _cameraPreviewImageSource.InitializeAsync(string.Empty);

It sets front camera as image source on my Windows Phone 8.1 device. How can I set back camera? String parameter preferedDeviceId should be "name of the camera to use for preview" but I don't know what exactly should I put as camera name.

Hello,
It's working well on the WP8.1 emulator, but deployed on my 1020 device, It throws an exception when calling _cameraPreviewImageSource.StartPreviewAsync().

Any idea ?

Thanks,
Stéphanie
TE @microsoft