使用C＃中的EasyWebCam在Windows 8平板电脑上自动打开后置摄像头

Question

I'm currently putting together a little project in c# designed to be used on Windows based tablets.

I have integrated the open source code available from http://easywebcam.codeplex.com/ to run the tablets camera. However, when you click the start button, it asks you to choose between the front or rear camera and as it is being used on a touch screen tablet, it's a bit on the fiddly side.

Does anyone know of a way of either adding a button to choose between the cameras or, better still, a way of automatically selecting the rear camera?

Answer 1

For Windows Store apps, a list of video capture device ids can be returned from DeviceInformation.FindAllAsync (DeviceClass.VideoCapture). See the Device enumeration sample for details.

Then you can set MediaCaptureInitializationSettings.VideoDeviceId and use it to initialize a capture session. Note however, this only supports UI-less capture. You cannot customize the selection in the CameraCaptureUI dialog.

For Desktop apps, a list of video capture device monikers can be returned from the device numerator (see How To Get A List Of Available Video Capture Devices for an example). Then you can plug the desired device moniker in your filter graph via IFilterGraph::AddFilter.