opencv讀取海康威視攝像頭

海康威視的網絡攝像頭使用：
開發工具：vs2013 C++ 海康SDKhtml

下載海康威視SDK：網址：http://www.hikvision.com/cn/download_61.html
• 1：對照本身的開發平臺能夠下載設備網絡SDK_Win32設備網絡SDK_Win64，解壓到本地文件下：
• 2：VS配置
• Opencv配置。參考址 http://blog.csdn.net/poem_qianmo/article/details/19809337
• 建議本身建立一個項目屬性表這樣方便使用
• SDK庫文件和頭文件配置
• 解壓SDK能夠獲得頭文件和庫文件
• 在VC++目錄中添加opencv的頭文件包含路徑和SDK中的頭文件（修改「頭文件」爲「include」）

添加庫文件：既要添加庫文件lib也要把lib下的HCNetSDKCom文件包含進去

再連接器——輸入——添加依賴項，把opencv的lib和SDK中的lib添加進去（包含HCNetSDKCom的lib）
opencv_ml249d.lib
opencv_calib3d249d.lib
opencv_contrib249d.lib
opencv_core249d.lib
opencv_features2d249d.lib
opencv_flann249d.lib
opencv_gpu249d.lib
opencv_highgui249d.lib
opencv_imgproc249d.lib
opencv_legacy249d.lib
opencv_objdetect249d.lib
opencv_ts249d.lib
opencv_video249d.lib
opencv_nonfree249d.lib
opencv_ocl249d.lib
opencv_photo249d.lib
opencv_stitching249d.lib
opencv_superres249d.lib
opencv_videostab249d.lib
GdiPlus.lib
HCCore.lib
HCNetSDK.LIB
PlayCtrl.lib
HCAlarm.lib
HCGeneralCfgMgr.lib
HCPreview.lib
配置完成後就能夠添加CPP文件。ios

#include <cstdlib>
#include <cstring>
#include <iostream>
#include "Windows.h"
#include "HCNetSDK.h"
#include "plaympeg4.h"
#include <opencv2\opencv.hpp>
#include <time.h>

using namespace std;
using namespace cv;

LONG nPort = -1;

volatile int gbHandling = 3;

//解碼回調 視頻爲YUV數據(YV12)，音頻爲PCM數據
void CALLBACK DecCBFun(long nPort, char * pBuf, long nSize, FRAME_INFO * pFrameInfo, long nReserved1, long nReserved2)
{
    if (gbHandling)
    {
        gbHandling--;
        return;
    }

    long lFrameType = pFrameInfo->nType;
    if (lFrameType == T_YV12)
    {

        Mat pImg(pFrameInfo->nHeight, pFrameInfo->nWidth, CV_8UC3);
        Mat src(pFrameInfo->nHeight + pFrameInfo->nHeight / 2, pFrameInfo->nWidth, CV_8UC1, pBuf);
        cvtColor(src, pImg, CV_YUV2BGR_YV12);
    // Sleep(-1);
        imshow("IPCamera", pImg);
        waitKey(1);

    }

    gbHandling = 3;

}


///實時流回調
void CALLBACK fRealDataCallBack(LONG lRealHandle, DWORD dwDataType, BYTE *pBuffer, DWORD dwBufSize, void *pUser)
{

    switch (dwDataType)
    {
    case NET_DVR_SYSHEAD: //系統頭

        if (!PlayM4_GetPort(&nPort))  //獲取播放庫未使用的通道號
        {
            break;
        }
        //m_iPort = lPort; //第一次回調的是系統頭，將獲取的播放庫port號賦值給全局port，下次回調數據時即便用此port號播放
        if (dwBufSize > 0)
        {
            if (!PlayM4_SetStreamOpenMode(nPort, STREAME_REALTIME))  //設置實時流播放模式
            {
                break;
            }

            if (!PlayM4_OpenStream(nPort, pBuffer, dwBufSize, 10 * 1024 * 1024)) //打開流接口
            {
                break;
            }

            if (!PlayM4_Play(nPort, NULL)) //播放開始
            {
                break;
            }
            if (!PlayM4_SetDecCallBack(nPort, DecCBFun))
            {
                break;
            }
        }
        break;
    case NET_DVR_STREAMDATA:   //碼流數據
        if (dwBufSize > 0 && nPort != -1)
        {
            if (!PlayM4_InputData(nPort, pBuffer, dwBufSize))
            {
                cout << "error" << PlayM4_GetLastError(nPort) << endl;
                break;
            }
        }
        break;
    default: //其餘數據
        if (dwBufSize > 0 && nPort != -1)
        {
            if (!PlayM4_InputData(nPort, pBuffer, dwBufSize))
            {
                break;
            }
        }
        break;
    }
}


void CALLBACK g_ExceptionCallBack(DWORD dwType, LONG lUserID, LONG lHandle, void *pUser)
{
    char tempbuf[256] = { 0 };
    switch (dwType)
    {
    case EXCEPTION_RECONNECT:    //預覽時重連
        printf("----------reconnect--------%d\n", time(NULL));
        break;
    default:
        break;
    }
}

void main() 
{

    //---------------------------------------
    // 初始化
    NET_DVR_Init();
    //設置鏈接時間與重連時間
    NET_DVR_SetConnectTime(2000, 1);
    NET_DVR_SetReconnect(10000, true);


    //---------------------------------------
    // 註冊設備
    LONG lUserID;
    NET_DVR_DEVICEINFO_V30 struDeviceInfo;
    lUserID = NET_DVR_Login_V30("169.254.42.127", 8000, "admin", "keylab88", &struDeviceInfo);
    if (lUserID < 0)
    {
        printf("Login error, %d\n", NET_DVR_GetLastError());
        NET_DVR_Cleanup();
        return;
    }

    //---------------------------------------
    //設置異常消息回調函數
    NET_DVR_SetExceptionCallBack_V30(0, NULL, g_ExceptionCallBack, NULL);

    //---------------------------------------
    //啓動預覽並設置回調數據流
    LONG lRealPlayHandle;
    cvNamedWindow("Mywindow", 0);
    cvNamedWindow("IPCamera", 0);

    HWND  h = (HWND)cvGetWindowHandle("Mywindow");
    if (h == 0)
    {
        cout << "窗口建立失敗" << endl;
    }


    NET_DVR_PREVIEWINFO struPlayInfo = { 0 };
    struPlayInfo.hPlayWnd = h;         //須要SDK解碼時句柄設爲有效值，僅取流不解碼時可設爲空
    struPlayInfo.lChannel = 1;           //預覽通道號
    struPlayInfo.dwStreamType = 0;       //0-主碼流，1-子碼流，2-碼流3，3-碼流4，以此類推
    struPlayInfo.dwLinkMode = 0;         //0- TCP方式，1- UDP方式，2- 多播方式，3- RTP方式，4-RTP/RTSP，5-RSTP/HTTP

    lRealPlayHandle = NET_DVR_RealPlay_V40(lUserID, &struPlayInfo, fRealDataCallBack, NULL);

    if (lRealPlayHandle < 0)
    {
        printf("NET_DVR_RealPlay_V40 error\n");
        printf("%d\n", NET_DVR_GetLastError());
        NET_DVR_Logout(lUserID);
        NET_DVR_Cleanup();
        return;
    }
    waitKey();

    Sleep(-1);
    //---------------------------------------
    //關閉預覽
    NET_DVR_StopRealPlay(lRealPlayHandle);
    //註銷用戶
    NET_DVR_Logout(lUserID);
    //釋放SDK資源
    NET_DVR_Cleanup();

    return;
}