监控编码

来源：互联网发布：div中调用js函数编辑：程序博客网时间：2024/05/29 03:51

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;

namespace YangShi
{
public class cVideo
{

          private IntPtr lwndC;       //保存无符号句柄
          private IntPtr mControlPtr; //保存管理指示器
          private int mWidth;
          private int mHeight;
          public cVideo(IntPtr handle, int width, int height)
          {
              mControlPtr = handle; //显示视频控件的句柄
              mWidth = width;      //视频宽度
              mHeight = height;    //视频高度

          }
         /// 打开视频设备
        /// </summary>
        public void StartWebCam()
        {
            byte[] lpszName = new byte[100];
            byte[] lpszVer = new byte[100];
            VideoAPI.capGetDriverDescriptionA(0, lpszName, 100, lpszVer, 100);
            this.lwndC = VideoAPI.capCreateCaptureWindowA(lpszName, VideoAPI.WS_CHILD | VideoAPI.WS_VISIBLE, 0, 0, mWidth, mHeight, mControlPtr, 0);
            if (VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_DRIVER_CONNECT, 0,0))
            {
                VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_SET_PREVIEWRATE, 100,0);
                VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_SET_PREVIEW, true, 0);
            }
        }
        /// <summary>
        /// 关闭视频设备
        /// </summary>
        public void CloseWebcam()
        {
            VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_DRIVER_DISCONNECT, 0,0);
        }
        ///   <summary>
        ///   拍照
        ///   </summary>
      ///   <param   name="path">要保存bmp文件的路径</param>
        public void GrabImage(IntPtr hWndC, string path)
        {
            IntPtr hBmp = System.Runtime.InteropServices.Marshal.StringToHGlobalAnsi(path);
            VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_SAVEDIB, 0, hBmp.ToInt32());
        }

         ///   <summary>
        ///   开始录像
        ///   </summary>
        ///   <param   name="path">要保存录像的路径</param>
        public void StarKinescope(string path)
        {
            IntPtr hBmp = Marshal.StringToHGlobalAnsi(path);
            VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_FILE_SET_CAPTURE_FILEA, 0, hBmp.ToInt32());
            VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_SEQUENCE, 0, 0);
        }
        /// <summary>
        /// 停止录像
        /// </summary>
        public void StopKinescope()
        {
            VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_START, 0, 0);

}

}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace YangShi
{

   public class VideoAPI
    {
        //视频ＡＰＩ调用

        //包含执行视频捕获的函数，给AVI文件的I/O处理和视频，音频设备驱动程序提供一个高级接口
        [DllImport("avicap32.dll")]

        // 该函数用于创建一个视频捕获窗口
        // 参数：标识窗口的名称，标识窗口风格，（X、Y标识窗口的左上角坐标），标识窗口的宽度和高度，标识父窗体句柄，标识窗口ID。
        // 返回视频捕捉窗口句柄
        public static extern IntPtr capCreateCaptureWindowA(byte[] lpszWindowName, int dwStyle, int x, int y, int nWidth, int nHeight, IntPtr hWndParent, int nID);
        [DllImport("avicap32.dll")]
        public static extern bool capGetDriverDescriptionA(short wDriver, byte[] lpszName, int cbName, byte[] lpszVer, int cbVer);

       [DllImport("User32.dll")]
        //用于向Windows系统发送消息机制
        //参数：hWnd:窗口句柄，wMsg：将要发送的消息，wParam、IParam：消息的参数，每个消息都有两个参数，参数设置有发送消息而定
        public static extern bool SendMessage(IntPtr hWnd, int wMsg, bool wParam, int lParam);
        [DllImport("User32.dll")]
        public static extern bool SendMessage(IntPtr hWnd, int wMsg, short wParam, int lParam);
       // 常量
        public const int WM_USER = 0x400; //16进制数 0x400=16^2乘以4=1024（十进制） 0x是16进制的前缀

        public const int WS_CHILD = 0x40000000;
        public const int WS_VISIBLE = 0x10000000;
        public const int SWP_NOMOVE = 0x2;
        public const int SWP_NOZORDER = 0x4;
        public const int WM_CAP_DRIVER_CONNECT = WM_USER + 10;
        public const int WM_CAP_DRIVER_DISCONNECT = WM_USER + 11;
        public const int WM_CAP_SET_CALLBACK_FRAME = WM_USER + 5;
        public const int WM_CAP_SET_PREVIEW = WM_USER + 50;
        public const int WM_CAP_SET_PREVIEWRATE = WM_USER + 52;
        public const int WM_CAP_SET_VIDEOFORMAT = WM_USER + 45;
        public const int WM_CAP_START = WM_USER;
        public const int WM_CAP_SAVEDIB = WM_CAP_START + 25;

        //视频录像变量
        public const int WM_CAP_SEQUENCE = WM_CAP_START + 62;
        public const int WM_CAP_FILE_SET_CAPTURE_FILEA = WM_CAP_START + 20;

}
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace YangShi
{
    public partial class ShiPin : Form
    {
        public ShiPin()
        {
            InitializeComponent();
        }
        cVideo video = null;
        //开始录像
        private void button1_Click(object sender, EventArgs e)
        {
            btnPlay.Enabled = false;
            btnStop.Enabled = true;
            btnPz.Enabled = true;
            video = new cVideo(pictureBox1.Handle, pictureBox1.Width, pictureBox1.Height);
            video.StartWebCam();
            video.StarKinescope(@"d:\lx.avi");
        }

        //暂停录像
        private void btnStop_Click(object sender, EventArgs e)
        {
            btnPlay.Enabled = true;
            btnStop.Enabled = false;
            btnPz.Enabled = false;
            video.CloseWebcam();
            video.StopKinescope();
        }

        //拍照
        private void btnPz_Click(object sender, EventArgs e)
        {
            video.GrabImage(pictureBox1.Handle, "d:\\a.bmp");
        }

        //关闭系统
        private void button4_Click(object sender, EventArgs e)
        {
            this.Close();
        }

}
}