C#调用摄像头拍摄,截图,视频

C#调用摄像头拍摄，截图，视频 (2013-01-29 14:35:43)   分类：C#     cs类： using System.Runtime.InteropServices; using System.Drawing.Imaging; namespace WindowsFormsApplication2 { class Pick { private const int WM_USER = 0x400; private const int WS_CHILD = 0x40000000; private const int WS_VISIBLE = 0x10000000; private const int WM_CAP_START = WM_USER; private const int WM_CAP_STOP = WM_CAP_START + 68; private const int WM_CAP_DRIVER_CONNECT = WM_CAP_START + 10; private const int WM_CAP_DRIVER_DISCONNECT = WM_CAP_START + 11; private const int WM_CAP_SAVEDIB = WM_CAP_START + 25; private const int WM_CAP_GRAB_FRAME = WM_CAP_START + 60; private const int WM_CAP_SEQUENCE = WM_CAP_START + 62; private const int WM_CAP_File_SET_CAPTURE_FILEA = WM_CAP_START + 20; private const int WM_CAP_SEQUENCE_NOFile = WM_CAP_START + 63; private const int WM_CAP_SET_OVERLAY = WM_CAP_START + 51; private const int WM_CAP_SET_PREVIEW = WM_CAP_START + 50; private const int WM_CAP_SET_CALLBACK_VIDEOSTREAM = WM_CAP_START + 6; private const int WM_CAP_SET_CALLBACK_ERROR = WM_CAP_START + 2; private const int WM_CAP_SET_CALLBACK_STATUSA = WM_CAP_START + 3; private const int WM_CAP_SET_CALLBACK_FRAME = WM_CAP_START + 5; private const int WM_CAP_SET_SCALE = WM_CAP_START + 53; private const int WM_CAP_SET_PREVIEWRATE = WM_CAP_START + 52; private IntPtr hWndC; private bool bStat = false; private IntPtr mControlPtr; private int mWidth; private int mHeight; private int mLeft; private int mTop; ///   /// 初始化摄像头   ///   /// 控件的句柄   /// 开始显示的左边距   /// 开始显示的上边距   /// 要显示的宽度   /// 要显示的长度   public Pick(IntPtr handle, int left, int top, int width, int height) { mControlPtr = handle; mWidth = width; mHeight = height; mLeft = left; mTop = top; } [DllImport("avicap32.dll")] private static extern IntPtr capCreateCaptureWindowA(byte[] lpszWindowName, int dwStyle, int x, int y, int nWidth, int nHeight, IntPtr hWndParent, int nID); [DllImport("avicap32.dll")] private static extern int capGetVideoFormat(IntPtr hWnd, IntPtr psVideoFormat, int wSize); [DllImport("User32.dll")] private static extern bool SendMessage(IntPtr hWnd, int wMsg, int wParam, int lParam); ///   /// 开始显示图像   ///   public void Start() { if (bStat) return; bStat = true; byte[] lpszName = new byte[100]; hWndC = capCreateCaptureWindowA(lpszName, WS_CHILD | WS_VISIBLE, mLeft, mTop, mWidth, mHeight, mControlPtr, 0); if (hWndC.ToInt32() != 0) { SendMessage(hWndC, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0); SendMessage(hWndC, WM_CAP_SET_CALLBACK_ERROR, 0, 0); SendMessage(hWndC, WM_CAP_SET_CALLBACK_STATUSA, 0, 0); SendMessage(hWndC, WM_CAP_DRIVER_CONNECT, 0, 0); SendMessage(hWndC, WM_CAP_SET_SCALE, 1, 0); SendMessage(hWndC, WM_CAP_SET_PREVIEWRATE, 66, 0); SendMessage(hWndC, WM_CAP_SET_OVERLAY, 1, 0); SendMessage(hWndC, WM_CAP_SET_PREVIEW, 1, 0); } return; } ///   /// 停止显示   ///   public void Stop() { SendMessage(hWndC, WM_CAP_DRIVER_DISCONNECT, 0, 0); bStat = false; } ///   /// 抓图   ///   /// 要保存bmp文件的路径   public void GrabImage(string path) // public void GrabImage( )   { IntPtr hBmp = Marshal.StringToHGlobalAnsi(path); SendMessage(hWndC, WM_CAP_SAVEDIB, 0, hBmp.ToInt32()); } ///   /// 录像   ///   /// 要保存avi文件的路径   public void Kinescope(string path) { IntPtr hBmp = Marshal.StringToHGlobalAnsi(path); SendMessage(hWndC, WM_CAP_File_SET_CAPTURE_FILEA, 0, hBmp.ToInt32()); 继续阅读