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

public partial class Form3 : Form
{
    private CameraService cameraService;

    public Form3()
    {
        InitializeComponent();
    }

    private void Form3_Load(object sender, EventArgs e)
    {
        try
        {
            cameraService = new CameraService();
            cameraService.NewFrame += CameraService_NewFrame;
            cameraService.StartCapture();
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
    }

    private void CameraService_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 (cameraService.CaptureAndSaveImage())
        {
            MessageBox.Show($"图像已保存");
        }
        else
        {
            MessageBox.Show($"图像抓拍失败");
        }
    }

    private void Form3_FormClosing(object sender, FormClosingEventArgs e)
    {
        cameraService.Dispose();
    }
}

public class CameraService : IDisposable
{
    private VideoCaptureDevice videoSource;
    private FilterInfoCollection videoDevices;
    private Bitmap latestFrame;

    public event NewFrameEventHandler NewFrame;

    public CameraService()
    {
        // 枚举所有视频输入设备
        videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
        if (videoDevices.Count == 0)
        {
            throw new Exception("未找到视频输入设备！");
        }

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

    private void VideoSource_NewFrame(object sender, NewFrameEventArgs eventArgs)
    {
        // 保存最新的帧图像
        latestFrame = (Bitmap)eventArgs.Frame.Clone();
        NewFrame?.Invoke(sender, eventArgs);
    }

    public void StartCapture()
    {
        if (videoSource != null && !videoSource.IsRunning)
        {
            videoSource.Start();
        }
    }

    public void StopCapture()
    {
        if (videoSource != null && videoSource.IsRunning)
        {
            videoSource.SignalToStop();
            videoSource.WaitForStop();
        }
    }

    public bool CaptureAndSaveImage()
    {
        if (latestFrame != null)
        {
            // 生成一个唯一的文件名
            string fileName = $"capture_{DateTime.Now:yyyyMMddHHmmss}.jpg";
            latestFrame.Save(fileName, System.Drawing.Imaging.ImageFormat.Jpeg);
            return true;
        }
        return false;
    }

    public void Dispose()
    {
        StopCapture();
        videoSource = null;
    }
}