【原】Aforge视频采集

1.项目->添加引用
AForge
AForge.Video.DirectShow
AForge.Video
AForge.Video.FFMPEG
AForge.Video.Controls1

2.使用AForge.Video.FFMPEG录制视频需要以下设置
1)配置管理器->平台改成:x86
2)App.config修改成:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<startup useLegacyV2RuntimeActivationPolicy="true">
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
</startup>
</configuration>
3)复制AForge.NET Framework-2.2.5-(libs only)\Externals\ffmpeg\bin目录下所有文件至
Projects\WpfApplication3\WpfApplication3\bin\x86\Debug(你的项目Debug目录下)

3.视频采集
1)WPF添加VideoSourcePlayer控件,因为是winforms控件,需要用到WindowsFormsHost 
<WindowsFormsHost x:Name="WfiWfh" Grid.Row="0" VerticalAlignment="Top" HorizontalAlignment="Left">
<aforge:VideoSourcePlayer x:Name="sourcePlayer" Dock="Top" Width="1080" Height="720" AutoSizeControl="False" AllowDrop="False"/>

</WindowsFormsHost>1

2)获取视频设备,开启视频
private FilterInfoCollection videoDevices;
private VideoCaptureDevice div = null;
// 设定初始视频设备
videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
if (videoDevices.Count > 0)
{ // 默认设备
div = new VideoCaptureDevice(videoDevices[0].MonikerString);
sourcePlayer.VideoSource = div;
}

sourcePlayer.Start();

4.抓取图片
System.Windows.Controls.Image image = new System.Windows.Controls.Image();
image.Source = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
sourcePlayer.GetCurrentVideoFrame().GetHbitmap(),
IntPtr.Zero,
Int32Rect.Empty,

BitmapSizeOptions.FromEmptyOptions());

5.录制视频
1)利用NewFrame事件,两种方式
一是VideoSourcePlayer控件的NewFrame事件:private void sourcePlayer_NewFrame(object sender, ref Bitmap image)
利用控件生成事件代码:
注意:private void sourcePlayer_NewFrame(object sender, Bitmap image),参数缺少ref引用,需手动修改
利用代码控制绑定事件:
sourcePlayer.NewFrame += new AForge.Controls.VideoSourcePlayer.NewFrameHandler(sourcePlayer_NewFrame);
录制完视频解除
sourcePlayer.NewFrame -= new AForge.Controls.VideoSourcePlayer.NewFrameHandler(sourcePlayer_NewFrame);

二是VideoCaptureDevice对象的NewFrame事件:void videoSource_NewFrame(object sender, AForge.Video.NewFrameEventArgs eventArgs)
利用代码控制绑定事件:
div.NewFrame += new NewFrameEventHandler(videoSource_NewFrame);
录制完视频解除绑定:
div.NewFrame -= new NewFrameEventHandler(videoSource_NewFrame);

2)在NewFrame事件中,利用VideoFileWriter对象写入视频文件

6.WPF下用到winforms控件标签WindowsFormsHost会遮挡wpf控件显示问题
代替VideoSourcePlayer控件可以使用WPF标准控件Image,在NewFrame事件中,不断刷新Image.Source,因为是跨线程控制Image控件的属性值,

需要利用委托方法的方式刷新Image.Source 

需要利用委托方法的方式刷新Image.Source 需要利用委托方法的方式刷新Image.Source