WPF使用Accord实现屏幕录制功能

using Accord.Math;
using Accord.Video;
using Accord.Video.FFMPEG;
using System;
using System.Windows;

namespace DesktopRecord.Helper
{
    public class AccordHelper
    {
        static ScreenCaptureStream screenStream;
        static VideoFileWriter videoWriter;
        public static void Start()
        {
            var workArea = SystemParameters.WorkArea.Size;
            var width = (int)workArea.Width;
            var height = (int)workArea.Height;
            var rectangle = new System.Drawing.Rectangle(0, 0, width, height);
            screenStream = new ScreenCaptureStream(rectangle);
            videoWriter = new VideoFileWriter();
            var filePath = $"{Environment.CurrentDirectory}/DesktopRecord_{DateTime.Now.ToString("yyyyMMddHHmmss")}.avi";
            var framerate = new Rational(1000, screenStream.FrameInterval);
            var videoBitRate = 1200 * 1000;
            videoWriter.Open(filePath, width, height, framerate, VideoCodec.MSMPEG4v3, videoBitRate);
            screenStream.FrameInterval = 40;
            screenStream.NewFrame += ScreenStream_NewFrame;
            screenStream.Start();
        }

        private static void ScreenStream_NewFrame(object sender, NewFrameEventArgs eventArgs)
        {
            if (videoWriter == null) return;
            videoWriter.WriteVideoFrame(eventArgs.Frame);
        }

        public static void Stop()
        {
            if (screenStream != null)
            {
                screenStream.Stop();
                screenStream = null;
            }
            if (videoWriter != null)
            {
                videoWriter.Close();
                videoWriter.Dispose();
                videoWriter = null;
            }
        }
    }
}

<UserControl
    x:Class="DesktopRecord.View.CommOptionView"
    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:local="clr-namespace:DesktopRecord.View"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:wd="https://github.com/WPFDevelopersOrg/WPFDevelopers"
    d:DesignHeight="450"
    d:DesignWidth="800"
    mc:Ignorable="d">
    <Grid>
        <StackPanel
            HorizontalAlignment="Center"
            VerticalAlignment="Center"
            Orientation="Horizontal">
            <Button
                Margin="0,0,5,0"
                Command="{Binding RecordCommand}"
                Content="开始录制"
                Style="{StaticResource WD.SuccessPrimaryButton}" />
            <Button
                Margin="5,0,0,0"
                wd:Loading.IsShow="{Binding IsShow}"
                wd:Loading.LoadingType="Normal"
                Command="{Binding RecordStopCommand}"
                Content="停止录制"
                Style="{StaticResource WD.DangerPrimaryButton}" />
        </StackPanel>
    </Grid>
</UserControl>

            <TabItem Height="35" Header="WindowsAPI 录制">
                <view:CommOptionView>
                    <view:CommOptionView.DataContext>
                        <vm:MainVM RecordEnums="WindowsAPI" />
                    </view:CommOptionView.DataContext>
                </view:CommOptionView>
            </TabItem>
            <TabItem Height="35" Header="Accord 录制">
                <view:CommOptionView>
                    <view:CommOptionView.DataContext>
                        <vm:MainVM RecordEnums="Accord" />
                    </view:CommOptionView.DataContext>
                </view:CommOptionView>
            </TabItem>