[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
The MediaElement calls this method to ask the MediaStreamSource to open the media.
protected abstract void OpenMediaAsync()
After the collection of MediaStreamDescription objects is instantiated, a developer should call ReportMediaCompleted with the collection of MediaStreamDescription objects. If the media cannot be opened, the ErrorOccurred method should be called instead.