论坛 › .net › WPF中使用LibVLCSharp.WPF 播放rtsp

格桑梅鸿 发表于 2023-2-14 14:11:14

WPF中使用LibVLCSharp.WPF 播放rtsp

目录

[*]LibVLCSharp.WPF简介
[*]vlc:VideoView基本使用

[*]安装LibVLC
[*]播放rtsp

[*]引入命名空间
[*]xaml 代码
[*]cs代码

[*]截图

[*]概述
[*]代码示例


[*]vlc:VideoView进阶使用

[*]空域问题
[*]宽高比设置

[*]全屏问题
[*]拉伸问题

[*]响应鼠标点击事件
[*]播放其他类型
[*]多视频重叠
[*]画中画

[*]引用

LibVLCSharp.WPF简介

从vlc说起


[*]vlc是一个开源的跨平台视频播放库，使用C/C++编写，vlc底层基于ffmpeg。地址：https://github.com/videolan/vlc
[*]LibVLC是对vlc的封装，提供了开发的灵活性、便捷性，统一和更加高级的api。C/C++编写。地址：https://code.videolan.org/videolan/libvlc-nuget
LibVLC支持的平台：
平台LibVLC包Nuget地址最低操作系统版本WindowsVideoLAN.LibVLC.Windowshttps://www.nuget.org/packages/VideoLAN.LibVLC.Windows/Windows XPUWPVideoLAN.LibVLC.UWPhttps://www.nuget.org/packages/VideoLAN.LibVLC.UWP/Windows 10MacVideoLAN.LibVLC.Machttps://www.nuget.org/packages/VideoLAN.LibVLC.Mac/macOS 10.7AndroidVideoLAN.LibVLC.Androidhttps://www.nuget.org/packages/VideoLAN.LibVLC.Android/Android 2.3iOSVideoLAN.LibVLC.iOShttps://www.nuget.org/packages/VideoLAN.LibVLC.iOS/iOS 8.4tvOSVideoLAN.LibVLC.tvOShttps://www.nuget.org/packages/VideoLAN.LibVLC.tvOS/tvOS 10.2LinuxLinuxGuide：https://code.videolan.org/videolan/LibVLCSharp/-/blob/3.x/docs/linux-setup.md

[*]LibVLCSharp是对LibVLC的封装，相当于一个包装器，提供给C#开发人员使用LibVLC的功能。地址：https://code.videolan.org/videolan/LibVLCSharp
[*]LibVLCSharp.WPF是LibVLCSharp的WPF实现，封装了vlc:VideoView 这个UI控件，用来播放视频。 LibVLCSharp.WPF可以在.NETCoreApp 3.1 ;.NETFramework 4.6.1+; net6.0+运行时中使用。
虽然LibVLCSharp 提供跨平台的解决方案，但是本文主要基于 Windows 平台来讨论。
vlc:VideoView基本使用

安装LibVLC

在使用LIibVLCSharp.WPF前必须先安装 LibVLC，否则会报如下错误：
//报错位置：实例化 LibVLC
 LibVLC    _libvlc=new LibVLC();

//Message：
Failed to load required native libraries.
Have you installed the latest LibVLC package from nuget for your target platform?
Search paths include E:\code\WPF\APngApp\bin\Debug\net7.0-windows\libvlc\win-x64\libvlc.dll,E:\code\WPF\APngApp\bin\Debug\net7.0-windows\libvlc\win-x64\libvlccore.dll; E:\code\WPF\APngApp\bin\Debug\net7.0-windows\libvlc\win-x64\libvlc.dll,E:\code\WPF\APngApp\bin\Debug\net7.0-windows\libvlc\win-x64\libvlccore.dll; E:\code\WPF\APngApp\bin\Debug\net7.0-windows\libvlc.dll,LibVLC安装方式：

[*]集成安装：LibVLC 已经打包成了一个package，放在了nuget上面，只需要在项目中安装此VideoLAN.LibVLC.Windows依赖就可以。nuget安装命令：NuGet\Install-Package VideoLAN.LibVLC.Windows
播放rtsp

新建 wpf 应用程序
引入命名空间

xmlns:vlc="clr-namespace:LibVLCSharp.WPF;assembly=LibVLCSharp.WPF"xaml 代码

<vlc:VideoViewx:Name="video_main" >
......
</vlc:VideoView>cs代码

private void MainWindow_Loaded(object sender, RoutedEventArgs e)
{
<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>LibVLC _libvlc = new LibVLC();
<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>LibVLCSharp.Shared.MediaPlayer player = new LibVLCSharp.Shared.MediaPlayer(_libvlc);
<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>video_main.Width = this.Width;
<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>video_main.Height = this.Height;
<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>video_main.MediaPlayer = player;
<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>//通过设置宽高比为窗体宽高可达到视频铺满全屏的效果
<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>player.AspectRatio = this.Width + ":" + this.Height;
<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>string url = "rtsp://user:password@192.168.1.120:554/ch1/main/av_stream";
<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>using (LibVLCSharp.Shared.Media media = new Media(_libvlc, new Uri(url)))
<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{
<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>video_main.MediaPlayer.Play(media);
<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}
}截图

概述

LibVLCSharp是对 vlc 的封装，而vlc本身就支持截图的功能，相应的LibVLCSharp也提供了一个 MediaPlayer.TakeSnapshot 的方法用来截图
调用该方法需要传递的参数：

[*]num：视频输出数量（通常第一个/仅一个为0）【直译过来的，这个参数具体什么意思尚不太清楚，当前是直接传0】
[*]filePath：图片文件存放路径，需要确保文件夹存在并有访问权限，如：D:\A\2.png
[*]width：图片的宽度
[*]height：图片的高度
[*]若宽高都为0，则生成的图片为视频原始大小；若宽为0或者高为0，则生成的图片为视频原始的纵横比
代码示例

在页面添加一个按钮，在按钮点击事件中处理截图。
xaml：
<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>cs：
private void snapshot_MouseLeftButtonDown(object sender, MouseButtonEventArgs e){<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>string dirPath = AppDomain.CurrentDomain.BaseDirectory+ "\\snapshot\\";<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>//string dirPath = "D:\\A\\";<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>string imgName = DateTime.Now.Ticks+ ".png";<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>string filePath = dirPath + imgName;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>bool r = this.video_main.MediaPlayer.TakeSnapshot(0, filePath, (uint)this.video_main.Width, (uint)this.video_main.Height);}

[*]video_main 就是 VideoView 控件的name
vlc:VideoView进阶使用

空域问题

由于VideoView控件的实现原理是在window上面绑定一个前台窗体（ForegroudWindow），然后在ForegroudWindow中播放视频，所以当需要在window中添加其他控件（如：label，button<vlc:VideoViewx:Name="video_main" >
......
</vlc:VideoView>）的时候不可以使用WPF原始的“并列”写法，而需要使用“层级”写法，即将需要展示的控件写在VideoView控件的"里面"，他们形成父子级关系。
上述文字可能比较难以理解， 用代码来分析。首先通过编写如下代码，让视频播放起来：
xaml：
<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>                                          <Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>cs：
using LibVLCSharp.Shared;using System;using System.Collections.Generic;using System.Linq;using System.Security.Policy;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;namespace APngApp{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>/// <Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>/// Interaction logic for MainWindow.xaml<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>/// <Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>public partial class MainWindow : Window<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>private LibVLC _libvlc;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>public MainWindow()<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>InitializeComponent();<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>_libvlc=new LibVLC();<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>private void Window_Loaded(object sender, RoutedEventArgs e)<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>LibVLCSharp.Shared.MediaPlayer player = new LibVLCSharp.Shared.MediaPlayer(_libvlc);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label> <Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>videoView.MediaPlayer = player;   <Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>using (LibVLCSharp.Shared.Media media = new Media(_libvlc, new Uri("rtsp://xxx:xxx@192.168.1.120:554/ch1/main/av_stream")))<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>videoView.MediaPlayer.Play(media);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}}如果一切正常，将看到如下的画面，并且在VS实时可视化树中将看到ForegroudWindow 和 MainWindow。


[*]可以看到虽然我们仅仅创建了一个MainWindow，但是确实有两个窗体存在，VideoView控件为程序生成了一个ForegroudWindow。
[*]当我们在VideoView内部编写一个button控件的时候，控件正确的显示出来了，如果我们将这个button移动到和vlc:VideoView并列的位置，按钮将不会显示出来，因为它被ForegroudWindow遮住了，这很诡异，也很有趣，这里就不列举并列写法的代码了。
[*]官方（videolan）把这种情况总结为空域问题，即 Airspace。
[*]不难看出来VideoView控件的这种设计有悖常理，但是据说这是由于LibVLC和vlc的局限性导致的，属于妥协式设计。但是大可放心使用，LibVLCSharp这套解决方案使用非常的广泛，而且截至目前（2023）官方issues仍非常活跃，并且版本也在不断更新中。官方也提供商业版本和付费的技术支持。
宽高比设置

宽高比设置是一个非常神奇的功能，它可以解决：

[*]想让画面全屏显示却出现了间隙，这里的间隙是指画面没有完全覆盖窗体。
[*]想要挤压或者拉伸画面却不知道如何实现。
[*]在异形屏幕上面全屏显示画面，如：画面比例是16：9，想要在分辨率为5：5的屏幕上面全屏显示画面
[*]其他宽高比问题，实际生产中，画面宽高比和屏幕宽高比都是不固定的，甚至可以说很随意，比如海康全景相机，其输出的画面本身就是宽度远高于高度，再比如同一个WPF程序需要在分辨率为1366768和25601440的屏幕分辨率下面全屏显示
[*]这里提到的画面是指rtsp源本身的画面大小
通过如下代码和现象可以很直观的观察到宽高比的神奇之处。
全屏问题

环境：Windows11，屏幕分辨率为2560*1440，未设置缩放


[*]新建一个WPF的窗体，引入VideoView控件，并在Window_ContentRendered 事件中初始化 MediaPlayer 以播放rtsp流。
[*]为尽可能排除其他因素对本问题的影响，将对窗体和VideoView控件做如下初始化设置：

[*]窗体的WindowStyle=None
[*]窗体的ResizeMode=NoResize
[*]窗体的AllowTransparency=true
[*]设置窗体初始宽高为屏幕工作区域，即不包括任务栏部分，此时实际高度小于1440
[*]设置video控件的 宽高为窗体的宽高

xaml代码：
<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>cs：
using LibVLCSharp.Shared;using System;using System.Collections.Generic;using System.Linq;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.Shapes;namespace RambleWPF{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>/// <Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>/// 视频控件3.xaml 的交互逻辑<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>/// <Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>public partial class 视频控件3 : Window<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>readonly LibVLC _libvlc;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>public 视频控件3()<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>InitializeComponent();<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>_libvlc = new LibVLC();<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>this.WindowStyle = WindowStyle.None;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>ResizeMode = ResizeMode.NoResize;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>AllowsTransparency = true;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>//工作区域就是不包括任务栏的其他区域<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>double x = SystemParameters.WorkArea.Width;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>//得到屏幕工作区域宽度<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>double y = SystemParameters.WorkArea.Height;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>win.Width = x;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>win.Height = y;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>win.Top = 0;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>win.Left = 0;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>video.Width = x;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>video.Height = y;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>private void Window_ContentRendered(object sender, EventArgs e)<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>string url = "rtsp://xxx:xxx@192.168.1.120:554/ch1/main/av_stream";<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>LibVLCSharp.Shared.MediaPlayer player = new LibVLCSharp.Shared.MediaPlayer(_libvlc);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>video.MediaPlayer = player;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>using (LibVLCSharp.Shared.Media media = new Media(_libvlc, new Uri(url)))<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>video.MediaPlayer.Play(media);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}}此时启动程序，如果不出意外，将看到如下的存在“间隙”的画面：

可以看到虽然在初始化的时候我们显示指定了video控件的宽高等于窗体的宽高，但是由于rtsp视频源的画面宽高比和窗体的宽高比不一致，所以出现了“间隙”。要如何解决此问题呢？只需要在Window_ContentRendered中主动设置video.MediaPlayer的宽高比为video控件的宽高即可。
修改后的 Window_ContentRendered 是这样的：
private void Window_ContentRendered(object sender, EventArgs e){<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>string url = "rtsp://xxx:xxx@192.168.1.120:554/ch1/main/av_stream";<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>LibVLCSharp.Shared.MediaPlayer player = new LibVLCSharp.Shared.MediaPlayer(_libvlc);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>video.MediaPlayer = player;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>using (LibVLCSharp.Shared.Media media = new Media(_libvlc, new Uri(url)))<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>video.MediaPlayer.Play(media);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>player.AspectRatio = video.Width + ":" + video.Height;}修改后的画面是这样的：


[*]可以看到间隙已经没有了，画面按照预期的方式显示了。
拉伸问题

环境：Windows11，屏幕分辨率为2560*1440，未设置缩放
通过对全屏问题的分析，拉伸问题其实就很好理解了，只需要设置特定的宽高比即可实现，如下代码将对画面纵向和横向进行拉伸
/// /// 挤压和拉伸/// /// /// private void extrusion_Click(object sender, RoutedEventArgs e){<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>video.MediaPlayer.AspectRatio = this.Width + ":" + 100;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>//video.MediaPlayer.AspectRatio = 100 + ":" + video.Height;}响应鼠标点击事件

由于空域问题的存在，视频画面是无法响应鼠标点击事件的，不过有一个曲线救国的办法：

[*]首先设置videoView控件的 isEnable 属性为false
[*]然后在视频画面上面放一个遮罩层，遮罩层背景需要设置为透明，此时点击画面将可以获取到响应的事件
核心代码如下：
初始化VideoView：
private void Window_ContentRendered(object sender, EventArgs e){<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>video.IsEnabled = false;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>string url = "rtsp://xxx:xxx@192.168.1.120:554/ch1/main/av_stream";<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>LibVLCSharp.Shared.MediaPlayer player = new LibVLCSharp.Shared.MediaPlayer(_libvlc);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>video.MediaPlayer = player;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>using (LibVLCSharp.Shared.Media media = new Media(_libvlc, new Uri(url)))<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>video.MediaPlayer.Play(media);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>player.AspectRatio = video.Width + ":" + video.Height;   }遮罩层xaml：
<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label> <Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label> <Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>  其中，mask_MouseLeftButtonDown 和root_grid_MouseLeftButtonDown 事件可以正常响应。
而video_MouseLeftButtonDown 事件无法响应，因为空域的存在，此事件要么绑定在ForegroudWindow上面，要么可能就没有成功被委托。
播放其他类型

如下代码演示了播放M3U8和本地文件：
private void Window_ContentRendered(object sender, EventArgs e){<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>video.IsEnabled = false;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>//rtsp 播放串<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>//string url = "rtsp://xxx:xxx@192.168.1.120:554/ch1/main/av_stream";<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>//m3u8播放串<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>//string url = "http://1257120875.vod2.myqcloud.com/0ef121cdvodtransgzp1257120875/3055695e5285890780828799271/v.f230.m3u8";<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>//播放文件<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>string url = "C:\\Users\\cml\\Desktop\\temp\\流浪地球2.mp4";<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>LibVLCSharp.Shared.MediaPlayer player = new LibVLCSharp.Shared.MediaPlayer(_libvlc);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>video.MediaPlayer = player;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>using (LibVLCSharp.Shared.Media media = new Media(_libvlc, new Uri(url)))<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>video.MediaPlayer.Play(media);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>player.AspectRatio = video.Width + ":" + video.Height;}多视频重叠

在一个窗体中播放两个视频，一个在后，全屏显示，一个在前，小窗播放。并且点击按钮可以切换画面位置。效果如下：

实现思路：

[*]首先，其实只要在xaml中编排好VideoView控件的上下位置就可以实现重叠了 ，越靠上的控件会覆盖在靠下的控件上方。
[*]切换功能的实现需要分别销毁前后两个VideoView的MediaPlayer.Media对象，并重新创建。
代码如下：
xaml：
<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>cs:
using LibVLCSharp.Shared;using System;using System.Collections.Generic;using System.Linq;using System.Security.Policy;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.Shapes;namespace RambleWPF{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>/// <Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>/// 视频控件2.xaml 的交互逻辑<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>/// <Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>public partial class 视频控件2 : Window<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>readonly LibVLC _libvlc;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>public 视频控件2()<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>InitializeComponent();<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>_libvlc = new LibVLC();<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>WindowStyle = WindowStyle.None;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>ResizeMode = ResizeMode.NoResize;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>AllowsTransparency = true;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>//工作区域就是不包括任务栏的其他区域<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>double x = SystemParameters.WorkArea.Width;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>//得到屏幕工作区域宽度<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>double y = SystemParameters.WorkArea.Height;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>win.Width = x;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>win.Height = y;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>win.Top = 0;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>win.Left = 0;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>private void Window_Loaded(object sender, RoutedEventArgs e)<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>Canvas.SetLeft(main_video, 100);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>Canvas.SetZIndex(main_video, 1);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>main_video.Width = 1366;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>main_video.Height = 768;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>Canvas.SetLeft(small_video, 150);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>Canvas.SetTop(small_video, 500);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>Canvas.SetZIndex(small_video, 2);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>small_video.Width = 300;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>small_video.Height = 168.75;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>private void Window_ContentRendered(object sender, EventArgs e)<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>this.Tag = main_video.Name;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>string url = "rtsp://xxx:xxx@192.168.1.120:554/ch1/main/av_stream";<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>LibVLCSharp.Shared.MediaPlayer player = new LibVLCSharp.Shared.MediaPlayer(_libvlc);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>main_video.MediaPlayer = player;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>using (LibVLCSharp.Shared.Media media = new Media(_libvlc, new Uri(url)))<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>main_video.MediaPlayer.Play(media);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>string url2 = "rtsp://xxx:xxx@192.168.1.142:554/Streaming/Channels/1";<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>LibVLCSharp.Shared.MediaPlayer player2 = new LibVLCSharp.Shared.MediaPlayer(_libvlc);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>small_video.MediaPlayer = player2;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>using (LibVLCSharp.Shared.Media media = new Media(_libvlc, new Uri(url2)))<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>small_video.MediaPlayer.Play(media);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>private void switch_Click(object sender, RoutedEventArgs e)<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>string url = "rtsp://xxx:xxx@192.168.1.120:554/ch1/main/av_stream";<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>string url2 = "rtsp://xxx:xxx@192.168.1.142:554/Streaming/Channels/1";<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>if (this.Tag as string != main_video.Name)<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>this.Tag = main_video.Name;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>using (LibVLCSharp.Shared.Media media = new Media(_libvlc, new Uri(url)))<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>main_video.MediaPlayer.Play(media);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>using (LibVLCSharp.Shared.Media media = new Media(_libvlc, new Uri(url2)))<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>small_video.MediaPlayer.Play(media);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>else<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>this.Tag = small_video.Name;<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>using (LibVLCSharp.Shared.Media media = new Media(_libvlc, new Uri(url2)))<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>main_video.MediaPlayer.Play(media);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>using (LibVLCSharp.Shared.Media media = new Media(_libvlc, new Uri(url)))<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>{<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>small_video.MediaPlayer.Play(media);<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label><Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}<Label  Width="70"  Height="70" Margin="5,0,5,0" Name="snapshot" MouseLeftButtonDown="snapshot_MouseLeftButtonDown"  Cursor="Hand">
<Label.Background>
    <ImageBrush ImageSource="/Images/small_video_hide.png" Stretch="Uniform"/>
</Label.Background>
</Label>}}

[*]small_video显示在前，为小屏；main_video显示在后，全屏显示
画中画

画中画本质上还是视频的重叠，可以参考视频重叠的实现思路实现。
引用


[*]VideoLAN.LibVLC.Windows的nuget：https://www.nuget.org/packages/VideoLAN.LibVLC.Windows/3.0.17.4
[*]LibVLCSharp官网：https://code.videolan.org/videolan/LibVLCSharp

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来源:https://www.cnblogs.com/Naylor/archive/2023/02/14/17118993.html
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