我需要什么控件来显示来自网络摄像头的视频

Question

我想集成一个网络摄像头，我正在使用Aforge。NET框架。我需要什么控件来显示网络摄像头视频。我的简单程序会得到网络摄像头，把它放在组合框中，当我点击"确定"时，我可以看到摄像头正在运行，但我看不到视频。C#/WPF

`

<Window x:Class="MyWebCam.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="425">
    <Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="4*"/>
        <RowDefinition Height="*"/>
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="*"/>
        <ColumnDefinition Width="*"/>
    </Grid.ColumnDefinitions>
        <Image Grid.ColumnSpan="2" x:Name="videoPlayer" Margin="15"></Image>
            <ComboBox Grid.Row="1"  Grid.ColumnSpan="2" x:Name="cbxDevices" MinWidth="150" Margin="15" VerticalAlignment="Center" HorizontalAlignment="left" SelectionChanged="cbxDevices_SelectionChanged" />
    <Button Grid.Column="1" Grid.Row="1" x:Name="btnOk" Content="OK" MinWidth="100" Margin="15" Click="btnOk_Click" />
    </Grid>
</Window>

`

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using AForge;
using AForge.Imaging;
using AForge.Video;
using AForge.Video.VFW;
using AForge.Video.DirectShow;
using AForge.Controls;
using System.Drawing;
using AForge.Vision.Motion;
using AForge.Vision;
namespace MyWebCam
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        //opened video source
        private VideoCaptureDevice videoSource = null;
        //motion detector
        MotionDetector detector = new MotionDetector(
            new TwoFramesDifferenceDetector(),
            new MotionAreaHighlighting());
        FilterInfoCollection videoDevices;
        private bool deviceExist = false;
        private string device;
        //video device
        public string VideoDevice
        {
            get { return device; }
        }
        public MainWindow()
        {
            InitializeComponent();
            getCamList();
        }
        private void getCamList()
        {
            try
            {
                videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
                cbxDevices.Items.Clear();
                if (videoDevices.Count == 0)
                {
                    throw new ApplicationException();
                }
                deviceExist = true;
                foreach (FilterInfo device in videoDevices)
                {
                    cbxDevices.Items.Add(device.Name);
                }
                cbxDevices.SelectedIndex = 0; //make first cam default
            }
            catch (ApplicationException)
            {
                deviceExist = false;
                cbxDevices.Items.Add("No webcams on your system");
            }
        }
        private void cbxDevices_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            device = videoDevices[cbxDevices.SelectedIndex].MonikerString;
            if (cbxDevices.SelectedIndex != -1)
            {
                videoSource = new VideoCaptureDevice(videoDevices[cbxDevices.SelectedIndex].MonikerString);
                videoSource.NewFrame += new NewFrameEventHandler(video_NewFrame);
            }
        }
        private void video_NewFrame(object sender, NewFrameEventArgs eventArgs)
        {
            // get new frame
            Bitmap video = (Bitmap)eventArgs.Frame;
            // process the frame
            videoPlayer.Source = video;   //this is where i'm having the problem
        }
        private void btnOk_Click(object sender, RoutedEventArgs e)
        {
            videoSource.Start();
        }
    }
}

Answer 1

WPF中没有任何内置功能。但我可以推荐Jeremiah Morrill的WPF MediaKit，你可以在http://wpfmediakit.codeplex.com/

该工具包中的VideoCaptureElement可以将来自任何捕获源（包括任何网络摄像头）的视频渲染到WPF中。

Answer 2

我们使用的是VLC Dot NET控件。这就像一个魅力，也与网络摄像头：http://vlcdotnet.codeplex.com/