WPF实现获取摄像头帧图的代码示例

<Window x:Class="WpfApp2.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:local="clr-namespace:WpfApp2"
xmlns:vlc="clr-namespace:LibVLCSharp.WPF;assembly=LibVLCSharp.WPF"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="800"> <Grid> <Image x:Name="video" Margin="0,40,0,0"/> <Button x:Name="StartButton" Content="start" HorizontalAlignment="Left" Margin="39,11,0,0" VerticalAlignment="Top" Click="StartButton_event"/> <Button x:Name="StopButton" Content="stop" HorizontalAlignment="Left" Margin="88,10,0,0" VerticalAlignment="Top" Click="StopButton_event"/> </Grid> </Window>

using AForge.Video;
using AForge.Video.DirectShow;
using LibVLCSharp.Shared;
using LoggerServiceFK;
using SkiaSharp;
using System;
using System.Collections.Concurrent;
using System.Diagnostics;
using System.Drawing;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Interop;
using System.Windows.Media.Imaging;

namespace WpfApp2 {
/// 
/// MainWindow.xaml 的交互逻辑
/// 
public partial class MainWindow : Window
{
private VideoCaptureDevice videoSource;
private bool isCapturing = false;

  public MainWindow()
    {
        InitializeComponent(); 
    }

    private void VideoSource_NewFrame(object sender, NewFrameEventArgs eventArgs)
    {
        if (isCapturing)
        {
            // Convert AForge.NET Framework's Bitmap to WPF's BitmapSource
            Bitmap aforgeBitmap = (Bitmap)eventArgs.Frame.Clone();
         
            // Display the video frame in an Image control
            Dispatcher.Invoke(() =>
            {
				//这里就可以对图片进行相关叠加操作，再赋值给source				
                video.Source = Convert(aforgeBitmap);
            });
        }
    }

    public static BitmapSource Convert(Bitmap bitmap)
    {
        if (bitmap == null)
        {
            throw new ArgumentNullException(nameof(bitmap));
        }

        // 获取 Bitmap 的 HBitmap 句柄
        IntPtr hBitmap = bitmap.GetHbitmap();

        // 使用 CreateBitmapSourceFromHBitmap 方法创建 BitmapSource
        BitmapSource bitmapSource = Imaging.CreateBitmapSourceFromHBitmap(
            hBitmap,
            IntPtr.Zero,
            Int32Rect.Empty,
            BitmapSizeOptions.FromEmptyOptions());

        // 释放 Bitmap 的 HBitmap 句柄
        NativeMethods.DeleteObject(hBitmap);

        return bitmapSource;
    }

    private static class NativeMethods
    {
        [System.Runtime.InteropServices.DllImport("gdi32.dll")]
        [return: System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.Bool)]
        public static extern bool DeleteObject(IntPtr hObject);
    }
    private void StartButton_event(object sender, RoutedEventArgs e)
    {
		//这里获取usb摄像头的地方
        FilterInfoCollection videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
        if (videoDevices.Count > 0)
        {
            //这里默认选择设备列表[0]，如果是笔记本外接usb摄像头要取数组[1]
            videoSource = new VideoCaptureDevice(videoDevices[0].MonikerString);
            videoSource.NewFrame += VideoSource_NewFrame;
            videoSource.Start();

            isCapturing = true;
        }
    }

    private void StopButton_event(object sender, RoutedEventArgs e)
    {
        if (videoSource != null && videoSource.IsRunning)
        {
		//SignalToStop()停止信号就行,使用stop()方法会导致更新线程卡死
            videoSource.SignalToStop();
            isCapturing = false;
        }
    }
}
}

		var CurrentBitmap = new SKBitmap(640,480);
		CurrentBitmap=aforgeBitmap.ToSKBitmap()；

//参考例子
var writeableBitmap = new WriteableBitmap(640, 480, 96, 96, PixelFormats.Bgr32, null);
writeableBitmap.WritePixels(new Int32Rect(0, 0, skbitmap.Width, skbitmap.Height), skbitmap.GetPixels(), skbitmap.RowBytes * skbitmap.Height, skbitmap.RowBytes);