在UWP上显示带CaptureMedia的蓝色摄像头屏幕

<Capabilities>
    <DeviceCapability Name="webcam" />
</Capabilities>

<CaptureElement x:Name="captureElement" />

using Windows.Media.Capture;
using Windows.UI.Xaml.Controls;

private MediaCapture mediaCapture;

public MainPage()
{
    this.InitializeComponent();
    InitializeCamera();
}

private async void InitializeCamera()
{
    mediaCapture = new MediaCapture();
    await mediaCapture.InitializeAsync();

    captureElement.Source = mediaCapture;
    await mediaCapture.StartPreviewAsync();
}

<Grid>
    <CaptureElement x:Name="captureElement" />
    <Rectangle Fill="Blue" Opacity="0.5" />
</Grid>