使用AForge.Net打开摄像头抓拍图片

【实例简介】

     使用AForge.Net抓拍图片

【实例截图】

【核心代码】

using AForge.Video.DirectShow;
using System;
using System.Drawing;
using System.Windows.Forms;

namespace AForgeTestApp
{
    public partial class MainForm : Form
    {
        private FilterInfoCollection videoDevices;
        private VideoCaptureDevice videoSource;
        private int Indexof = 0;

        public MainForm()
        {
            InitializeComponent();
        }
        //添加所有的摄像头到combobox列表里
        private void Camlist()
        {
            videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);

            if (videoDevices.Count == 0)
            {
                MessageBox.Show("未找到摄像头设备");
            }
            foreach (FilterInfo device in videoDevices)
            {
                Cameralist.Items.Add(device.Name);
            }
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            Camlist();
        }

        private void OpenVoidVtn_Click(object sender, EventArgs e)
        {
            Indexof = Cameralist.SelectedIndex;
            if (Indexof < 0)
            {
                MessageBox.Show("请选择一个摄像头");
                return;
            }
            //this.pictureBox1.Visible = false;
            this.videoSourcePlayer1.Visible = true;
            //videoDevices[Indexof]确定出用哪个摄像头了。
            videoSource = new VideoCaptureDevice(videoDevices[Indexof].MonikerString);
            //设置下像素，这句话不写也可以正常运行：
            videoSource.VideoResolution = videoSource.VideoCapabilities[Indexof];
            //在videoSourcePlayer1里显示
            videoSourcePlayer1.VideoSource = videoSource;
            videoSourcePlayer1.Start();
        }

        private void Form1_FormClosed(object sender, FormClosedEventArgs e)
        {
            //这里停止摄像头继续工作 当然videoSourcePlayer里也定义了 Stop();用哪个都行
            videoSourcePlayer1.Stop();
            // videoSourcePlayer1.SignalToStop(); videoSourcePlayer1.WaitForStop();
        }

        private void SnapPictureBtn_Click(object sender, EventArgs e)
        {
            if (videoSource == null)
            {
                MessageBox.Show("请先打开摄像头");
                return;
            }
            //videoSourcePlayer继承Control父类，定义 GetCurrentVideoFrame能输出bitmap
            Bitmap bitmap = videoSourcePlayer1.GetCurrentVideoFrame();
            bitmap.Save($"{DateTime.Now:yyyyMMddHHmmss}.jpeg");
        }
    }
}