c# - 如何在 Windows 10 Mobile 上分屏摄像头

Question

我想将我的后置摄像头拆分为两个 ui 对象，例如镜头。但是当我启动应用程序时出现错误。这是它:

如何将相机分成两个对象？这是我的代码:GamePage.xaml.cs

 public sealed partial class GamePage : Page
{
    readonly Game1 _game;

    public GamePage()
    {
        this.InitializeComponent();
        // Create the game.
       // var launchArguments = string.Empty;
        //_game = MonoGame.Framework.XamlGame<Game1>.Create(launchArguments, Window.Current.CoreWindow, swapChainPanel);
    }

    Windows.Media.Capture.MediaCapture captureManager;
    async private Task Start_Capture_Preview_Click()
    {
        captureManager = new MediaCapture();    //Define MediaCapture object  
        await captureManager.InitializeAsync();   //Initialize MediaCapture and   
        capturePreview.Source = captureManager;   //Start preiving on CaptureElement  
        capturePreview2.Source = captureManager;   //Start preiving on CaptureElement  
        await captureManager.StartPreviewAsync();  //Start camera capturing   
    }
    async private void Stop_Capture_Preview_Click()
    {
        await captureManager.StopPreviewAsync();  //stop camera capturing  

    }

    async private Task Start_Capture_Preview_ClickR()
    {
        captureManager = new MediaCapture();    //Define MediaCapture object  
        await captureManager.InitializeAsync();   //Initialize MediaCapture and   
        capturePreview2.Source = captureManager;   //Start preiving on CaptureElement  
        await captureManager.StartPreviewAsync();  //Start camera capturing   
    }


    protected override async void OnNavigatedTo(NavigationEventArgs e)
    {
        await Start_Capture_Preview_Click();
        await Start_Capture_Preview_ClickR();
    }

}

游戏页面.xaml:

<Page
x:Class="Victoria_XVR.GamePage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:Victoria_XVR"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">

<Grid x:Name="xD">
    <Grid.RowDefinitions>
        <RowDefinition Height="200" />
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="300" />
        <ColumnDefinition Width="300" />
    </Grid.ColumnDefinitions>

    <CaptureElement x:Name="capturePreview" Grid.Row="0" Grid.Column="0"/>
    <CaptureElement x:Name="capturePreview2" Grid.Row="0" Grid.Column="1"/>
</Grid>

Answer 1

我认为 MediaCapture 不支持同时流式传输到多个 CaptureElements。将此作为解决方法推荐有点痛苦，但理论上您可以在计时器中使用 GetPreviewFrameAsync 方法，并手动将这些帧呈现给 Image 控件。有 a sample展示了如何使用 API。我预计这会增加内存和 CPU 使用率，而不是只渲染单个预览。