AForge.video摄像头深入研究

为了实现与界面的完美解耦、支持多摄像头独立配置以及统一生命周期管理，我让AI封装了一个独立的类库

用起来就很简单了

using AForge;
using AForge.Video;
using AForge.Video.DirectShow;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApp2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            // 示例：打开第一个摄像头 (索引 0)，水平左右镜像 (2)，画面塞进 panel1
            AForgeCameraManager.InitCamera(0, 3, panel1);

            // 示例：假设你有第二个摄像头，打开它 (索引 1)，不镜像 (0)，画面塞进 panel2
             AForgeCameraManager.InitCamera(1, 1, panel2);
        }

 

        private void Form1_FormClosed(object sender, FormClosedEventArgs e)
        {
            AForgeCameraManager.CloseAllCameras();
        }

    }
}

AForgeCameraManager.CS 类库代码如下:

using AForge.Controls;
using AForge.Video.DirectShow;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;

namespace WindowsFormsApp2
{
    public class AForgeCameraManager
    {
        // 静态列表：用于记录当前打开的所有摄像头播放器实例，方便统一关闭
        private static List<VideoSourcePlayer> activePlayers = new List<VideoSourcePlayer>();

        /// <summary>
        /// 1. 初始化摄像头并在指定控件中显示
        /// </summary>
        /// <param name="deviceIndex">摄像头端口号（索引，从0开始）</param>
        /// <param name="mirrorType">镜像方向：0=不镜像, 1=上下, 2=左右, 3=上下左右</param>
        /// <param name="placeholder">占位控件（例如 Panel，用于决定摄像头画面的位置和大小）</param>
        public static void InitCamera(int deviceIndex, int mirrorType, Control placeholder)
        {
            // 1. 获取所有视频输入设备
            FilterInfoCollection videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);

            if (videoDevices.Count == 0)
            {
                MessageBox.Show("未检测到任何摄像头设备！", "提示");
                return;
            }

            if (deviceIndex < 0 || deviceIndex >= videoDevices.Count)
            {
                MessageBox.Show($"找不到索引为 {deviceIndex} 的摄像头！", "提示");
                return;
            }

            // 2. 实例化对应摄像头
            VideoCaptureDevice videoDevice = new VideoCaptureDevice(videoDevices[deviceIndex].MonikerString);

            // 3. 自动寻找最佳画质
            if (videoDevice.VideoCapabilities.Length > 0)
            {
                var bestResolution = videoDevice.VideoCapabilities
                    .OrderByDescending(c => c.FrameSize.Width * c.FrameSize.Height)
                    .ThenByDescending(c => c.MaximumFrameRate)
                    .First();

                videoDevice.VideoResolution = bestResolution;
                Console.WriteLine($"摄像头[{deviceIndex}] 选择画质: {bestResolution.FrameSize.Width}x{bestResolution.FrameSize.Height} @ {bestResolution.MaximumFrameRate}fps");
            }

            // 4. 动态创建视频播放控件，解耦UI
            VideoSourcePlayer player = new VideoSourcePlayer();
            player.VideoSource = videoDevice;

            // 设置停靠方式为填满占位控件
            player.Dock = DockStyle.Fill;

            // 5. 解析并应用镜像设置
            RotateFlipType flipType = RotateFlipType.RotateNoneFlipNone;
            switch (mirrorType)
            {
                case 1: flipType = RotateFlipType.RotateNoneFlipY; break;   // 上下
                case 2: flipType = RotateFlipType.RotateNoneFlipX; break;   // 左右
                case 3: flipType = RotateFlipType.RotateNoneFlipXY; break;  // 上下左右
            }

            // 只有需要翻转时才订阅事件，节省性能
            if (flipType != RotateFlipType.RotateNoneFlipNone)
            {
                // 使用匿名委托(Lambda)绑定事件，这样每个摄像头都能独立记住自己的翻转方式，互不干扰
                player.NewFrame += (object sender, ref Bitmap image) =>
                {
                    image.RotateFlip(flipType);
                };
            }

            // 6. 将控件加入占位符，并启动
            // 清空占位控件中可能残留的其他内容
            placeholder.Controls.Clear();
            placeholder.Controls.Add(player);

            // 记录到静态列表中
            activePlayers.Add(player);

            // 启动播放
            player.Start();
        }

        /// <summary>
        /// 2. 关闭全部已知打开的摄像头
        /// </summary>
        public static void CloseAllCameras()
        {
            foreach (var player in activePlayers)
            {
                if (player != null && player.IsRunning)
                {
                    // 发送停止信号
                    player.SignalToStop();
                    // 阻塞等待当前帧处理完毕并安全释放硬件连接
                    player.WaitForStop();
                }

                // 从 UI 占位控件中移除并释放资源
                if (player != null && !player.IsDisposed)
                {
                    player.Dispose();
                }
            }

            // 清空追踪列表
            activePlayers.Clear();
            Console.WriteLine("所有摄像头已安全关闭。");
        }
    }
}

完整工程:

WindowsFormsApp2.zip

ai还是方便的

回复#2 @aubreychao :

那是相当方便啊, 很多东西自己写写改改估计要一个上午, ai几分钟改好