WPFMediaKit 播放 rtsp 视频流

• 框架使用.NET40；
• Visual Studio 2019;
• 以下几种方案可以播放rtsp：
  • Vlc
  • Emgu
  • WPFMediaKit
• 此篇是WPFMediaKit播放rtsp视频流，再使用控件MediaUriElement进行播放rtsp时通常不会成功（可能会出现报错或者直接不显示画面），那是因为本地没有按照解码器导致。
• WPF-MediaKit 要求在计算机上安装 DirectShow 编解码器。
• 可以安装以下解码器解决无法播放rtsp视频流问题.
  • K-Lite下载完成运行
  • LAVFilters
  • ffdshow

• 安装完成后就可以正常预览rtsp视频流.
• 创建项目后引入Nuget包。

1）新建 MainWindow.xaml 代码如下：

<wpfdev:Window x:Class="WPFPlayRTSPExample.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:wpfdev="https://github.com/WPFDevelopersOrg/WPFDevelopers"
        xmlns:controls="clr-namespace:WPFMediaKit.DirectShow.Controls;assembly=WPFMediaKit"
        xmlns:local="clr-namespace:WPFPlayRTSPExample"
        mc:Ignorable="d" WindowStartupLocation="CenterScreen"
        Title="WPFPlayRTSPExample" Height="450" Width="800">
    <wpfdev:SixGirdView BorderThickness="1" SelectBrush="Red">
        <wpfdev:SixGirdView.Resources>
            <Style TargetType="TextBlock">
                <Setter Property="Foreground" Value="White"/>
                <Setter Property="VerticalAlignment" Value="Center"/>
                <Setter Property="HorizontalAlignment" Value="Center"/>
            </Style>
            <Style TargetType="Border">
                <Setter Property="Margin" Value="1"/>
            </Style>
            <Style TargetType="RadioButton">
                <Setter Property="Margin" Value="1"/>
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="RadioButton">
                            <wpfdev:SmallPanel>
                                <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                                          Margin="{TemplateBinding Padding}" 
                                          VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
                                <Border Background="{DynamicResource PrimaryNormalSolidColorBrush}"
                                        VerticalAlignment="Top"
                                        HorizontalAlignment="Left"
                                        Padding="10,4"
                                        CornerRadius="3"
                                        Name="PART_Border"
                                        Visibility="Collapsed">
                                    <TextBlock Text="正在播放" Foreground="White"/>
                                </Border>
                            </wpfdev:SmallPanel>
                            <ControlTemplate.Triggers>
                                <Trigger Property="IsChecked" Value="True">
                                    <Setter Property="Visibility" TargetName="PART_Border" Value="Visible"/>
                                </Trigger>
                            </ControlTemplate.Triggers>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
        </wpfdev:SixGirdView.Resources>
        <controls:MediaUriElement x:Name="mediaUriElement" Margin="1"/>
        <RadioButton DataContext="{Binding RtspModelCollection[0],RelativeSource={RelativeSource AncestorType=local:MainWindow}}"
                     Checked="RadioButton_Checked" x:Name="rBtn1">
            <Image Source="/Images/grid1.png"/>
        </RadioButton>
        <RadioButton DataContext="{Binding RtspModelCollection[1],RelativeSource={RelativeSource AncestorType=local:MainWindow}}"
                     Checked="RadioButton_Checked">
            <Image Source="/Images/grid2.png"/>
        </RadioButton>
        <RadioButton DataContext="{Binding RtspModelCollection[2],RelativeSource={RelativeSource AncestorType=local:MainWindow}}"
                     Checked="RadioButton_Checked">
            <Image Source="/Images/grid3.png"/>
        </RadioButton>
        <RadioButton DataContext="{Binding RtspModelCollection[3],RelativeSource={RelativeSource AncestorType=local:MainWindow}}"
                     Checked="RadioButton_Checked">
            <Image Source="/Images/grid4.png"/>
        </RadioButton>
        <Border Background="#282C34">
            <TextBlock Text="无信号"/>
        </Border>
    </wpfdev:SixGirdView>
</wpfdev:Window>

2） MainWindow.xaml.cs 代码如下：

using System;
using System.Collections.ObjectModel;
using System.Windows;
using System.Windows.Controls;

namespace WPFPlayRTSPExample
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow
    {
        public ObservableCollection<RtspModel> RtspModelCollection
        {
            get { return (ObservableCollection<RtspModel>)GetValue(RtspModelCollectionProperty); }
            set { SetValue(RtspModelCollectionProperty, value); }
        }

        public static readonly DependencyProperty RtspModelCollectionProperty =
            DependencyProperty.Register("RtspModelCollection", typeof(ObservableCollection<RtspModel>), typeof(MainWindow), new PropertyMetadata(null));
        public MainWindow()
        {
            InitializeComponent();
            Loaded += delegate
            {
                RtspModelCollection = new ObservableCollection<RtspModel>();
                RtspModelCollection.Add(new RtspModel { RTSPUri = "rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mp4" });
                RtspModelCollection.Add(new RtspModel { RTSPUri = "http://devimages.apple.com/iphone/samples/bipbop/gear1/prog_index.m3u8" });
                RtspModelCollection.Add(new RtspModel { RTSPUri = "http://ws.flv.huya.com/src/1394575534-1394575534-5989656310331736064-2789274524-10057-A-0-1.flv?wsSecret=cf05e7dbacda9cf2ec112517a276458c&wsTime=639bf822&fm=RFdxOEJjSjNoNkRKdDZUWV8kMF8kMV8kMl8kMw%3D%3D&ctype=huya_live&txyp=o%3An6%3B&fs=bgct&sphdcdn=al_7-tx_3-js_3-ws_7-bd_2-hw_2&sphdDC=huya&sphd=264_*-265_*&exsphd=264_500,264_2000,&ratio=500" });
                RtspModelCollection.Add(new RtspModel { RTSPUri = "rtsp://admin:Ancn1111@192.168.21.128:554/h264/ch1/main/av_stream" });
                rBtn1.IsChecked = true;
            };
        }

        private void RadioButton_Checked(object sender, RoutedEventArgs e)
        {
            if(sender is RadioButton radio)
            {
                var model = radio.DataContext as RtspModel;
                if (model == null) return;
                mediaUriElement.Source = new Uri(model.RTSPUri);
            }
        }
    }
    public class RtspModel
    {
        public string RTSPUri { get; set; }
    }
}