C# AForge.Video 使用调用usb uvc协议调用摄像头 winform使用 视频呈现及抓拍 视频呈现秒开。

public partial class Form3 : Form
{
    private VideoCaptureDevice videoSource;
    private FilterInfoCollection videoDevices;

    public Form3()
    {
        InitializeComponent();
    }

    private void Form3_Load(object sender, EventArgs e)
    {
        // 枚举所有视频输入设备
        videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);

        if (videoDevices.Count == 0)
        {
            MessageBox.Show("未找到视频输入设备！");
            return;
        }

        // 选择第一个视频设备
        videoSource = new VideoCaptureDevice(videoDevices[0].MonikerString);

        // 为新帧事件添加处理程序
        videoSource.NewFrame += new NewFrameEventHandler(videoSource_NewFrame);

        // 开始捕获视频
        videoSource.Start();
    }

    private void videoSource_NewFrame(object sender, NewFrameEventArgs eventArgs)
    {
        // 获取新帧的图像
        Bitmap videoFrame = (Bitmap)eventArgs.Frame.Clone();

        // 在 PictureBox 中显示图像
        videoSourcePlayer.Image = videoFrame;
    }

    private void btnStart_Click_1(object sender, EventArgs e)
    {
        if (videoSourcePlayer.Image != null)
        {
            // 生成一个唯一的文件名
            string fileName = $"capture_{DateTime.Now:yyyyMMddHHmmss}.jpg";

            // 保存图像
            videoSourcePlayer.Image.Save(fileName, System.Drawing.Imaging.ImageFormat.Jpeg);

            MessageBox.Show($"图像已保存为 {fileName}");
        }
    }

    private void Form3_FormClosing(object sender, FormClosingEventArgs e)
    {
        // 停止视频捕获
        if (videoSource != null && videoSource.IsRunning)
        {
            videoSource.SignalToStop();
            videoSource.WaitForStop();
            videoSource = null;
        }
    }
}