在C#项目中使用Vlc.DotNet集成VLC播放器

Question

我想集成到我的项目，一个VLC播放器，以显示摄像机流。为此，我尝试在我的WPF项目中使用Vlc.DotNet (2.1.126版本)。

我的测试是在以下XAML文件中完成的(我在XAML/WPF方面有点初学者)：

<UserControl x:Class="TVSCS_View.VideoDisplay.VideoPlayerControl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:ctrl="clr-namespace:TVSCS_View.VideoDisplay"
             xmlns:wpf="clr-namespace:Vlc.DotNet.Wpf;assembly=Vlc.DotNet.Wpf"
             mc:Ignorable="d" 
             d:DesignHeight="300" 
             d:DesignWidth="300"
             x:Name="controlVideoDisplay"
             DataContext="{Binding ElementName=controlVideoDisplay}">
    <Border BorderBrush="Black"
            BorderThickness="1">
        <Grid x:Name="videoDisplayLayoutRoot"
              Margin="5,5,5,5">
            <Image Source="{Binding ElementName=myVlcControl}" 
                   HorizontalAlignment="Stretch" 
                   VerticalAlignment="Stretch"/>
            <ctrl:VideoCommandsControl x:Name="videoPlayerControl"
                                       VerticalAlignment="Bottom"
                                       Height="25"
                                       Width="175"
                                       Visibility="Visible"
                                       Margin="10,0,10,20" />
            <ctrl:VideoTimeLineControl x:Name="timeLineControl"
                                       VerticalAlignment="Bottom"
                                       Margin="0,0,0,0"/>
        </Grid>
    </Border>
</UserControl>

关联的.cs文件是：

using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Vlc.DotNet.Wpf;

namespace TVSCS_View.VideoDisplay
{
    /// <summary>
    /// Logique d'interaction pour VideoPlayerControl.xaml
    /// </summary>
    public partial class VideoPlayerControl : UserControl
    {
        public VlcControl myVlcControl;

        public VideoPlayerControl()
        {
            InitializeComponent();

            MediaPlayer media = new MediaPlayer();

            myVlcControl = new VlcControl();
            var currentAssembly = Assembly.GetEntryAssembly();
            var currentDirectory = new FileInfo(currentAssembly.Location).DirectoryName;

            if (Environment.Is64BitOperatingSystem)
            {
                myVlcControl.MediaPlayer.VlcLibDirectory = new DirectoryInfo(System.IO.Path.Combine(currentDirectory, @"C:\Users\t0115019\Documents\Visual Studio 2015\Projects\tvscs_display\packages\VLC\"));
            }

            myVlcControl.MediaPlayer.EndInit();
            myVlcControl.MediaPlayer.Play(new Uri("C:/Users/Documents/WP_20160908_11_16_53_Pro.mp4"));
        }
    }
}

目前，在执行应用程序时，我有一个异常"FillNotFOundException“链接到"myVlcControl.MediaPlayer.EndInit()”行。如果删除这一行，UserControl中不会显示任何内容。

Nota:我尝试使用以下方法集成VlcControl：

<UserControl x:Class="TVSCS_View.VideoDisplay.VideoPlayerControl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:ctrl="clr-namespace:TVSCS_View.VideoDisplay"
             xmlns:wpf="clr-namespace:Vlc.DotNet.Wpf;assembly=Vlc.DotNet.Wpf"
             mc:Ignorable="d" 
             d:DesignHeight="300" 
             d:DesignWidth="300"
             x:Name="controlVideoDisplay"
             DataContext="{Binding ElementName=controlVideoDisplay}">
    <Border BorderBrush="Black"
            BorderThickness="1">
        <Grid x:Name="videoDisplayLayoutRoot"
              Margin="5,5,5,5">
            <wpf:VlcControl x:Name="myVlcControl" />
        </Grid>
    </Border>
</UserControl>

但是在本例中，我有以下消息:不能将"VlcControl“类型的值添加到'UIElementCollection‘类型的集合或字典中。

你对我的小问题有什么解决办法吗？谢谢

Answer 1

VlcControl的WPF版本只是一个WindowsFormsHost控件，托管了VlcControl的Windows版本。从错误消息(类型"VlcControl“的值不能添加到‘UIElementCollection’类型的集合或字典中)判断，您只是忽略了对WindowsFormsIntegration程序集的引用，其中定义了WindowsFormsHost (可以在参考管理器中的Assemblies→框架下找到它)。

下面是一个托管VLC播放器的WPF窗口的完整示例。您需要安装Vlc.DotNet.Wpf NuGet软件包 (及其依赖项)并引用WindowsFormsIntegration程序集。

MainWindow.xaml

<Window x:Class="HelloVlc.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:vlc="clr-namespace:Vlc.DotNet.Wpf;assembly=Vlc.DotNet.Wpf">
    <vlc:VlcControl x:Name="vlcPlayer" />
</Window>

MainWindow.xaml.cs

public partial class MainWindow
{
    public MainWindow()
    {
        InitializeComponent();
        vlcPlayer.MediaPlayer.VlcLibDirectory =
            //replace this path with an appropriate one
            new DirectoryInfo(@"c:\Program Files (x86)\VideoLAN\VLC\");
        vlcPlayer.MediaPlayer.EndInit();
        vlcPlayer.MediaPlayer.Play(new Uri("http://download.blender.org/peach/" +
            "bigbuckbunny_movies/big_buck_bunny_480p_surround-fix.avi"));
    }
}