opencv读取海康威视摄像头

海康威视的网络摄像头使用：
开发工具：vs2013 C++ 海康SDKhtml

下载海康威视SDK：网址：http://www.hikvision.com/cn/download_61.html
• 1：对照本身的开发平台能够下载设备网络SDK_Win32设备网络SDK_Win64，解压到本地文件下：
• 2：VS配置
• Opencv配置。参考址 http://blog.csdn.net/poem_qianmo/article/details/19809337
• 建议本身建立一个项目属性表这样方便使用
• SDK库文件和头文件配置
• 解压SDK能够获得头文件和库文件
• 在VC++目录中添加opencv的头文件包含路径和SDK中的头文件（修改“头文件”为“include”）

添加库文件：既要添加库文件lib也要把lib下的HCNetSDKCom文件包含进去

再连接器——输入——添加依赖项，把opencv的lib和SDK中的lib添加进去（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
配置完成后就能够添加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;

//解码回调 视频为YUV数据(YV12)，音频为PCM数据
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;

}


///实时流回调
void CALLBACK fRealDataCallBack(LONG lRealHandle, DWORD dwDataType, BYTE *pBuffer, DWORD dwBufSize, void *pUser)
{

    switch (dwDataType)
    {
    case NET_DVR_SYSHEAD: //系统头

        if (!PlayM4_GetPort(&nPort))  //获取播放库未使用的通道号
        {
            break;
        }
        //m_iPort = lPort; //第一次回调的是系统头，将获取的播放库port号赋值给全局port，下次回调数据时即便用此port号播放
        if (dwBufSize > 0)
        {
            if (!PlayM4_SetStreamOpenMode(nPort, STREAME_REALTIME))  //设置实时流播放模式
            {
                break;
            }

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

            if (!PlayM4_Play(nPort, NULL)) //播放开始
            {
                break;
            }
            if (!PlayM4_SetDecCallBack(nPort, DecCBFun))
            {
                break;
            }
        }
        break;
    case NET_DVR_STREAMDATA:   //码流数据
        if (dwBufSize > 0 && nPort != -1)
        {
            if (!PlayM4_InputData(nPort, pBuffer, dwBufSize))
            {
                cout << "error" << PlayM4_GetLastError(nPort) << endl;
                break;
            }
        }
        break;
    default: //其余数据
        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:    //预览时重连
        printf("----------reconnect--------%d\n", time(NULL));
        break;
    default:
        break;
    }
}

void main() 
{

    //---------------------------------------
    // 初始化
    NET_DVR_Init();
    //设置链接时间与重连时间
    NET_DVR_SetConnectTime(2000, 1);
    NET_DVR_SetReconnect(10000, true);


    //---------------------------------------
    // 注册设备
    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;
    }

    //---------------------------------------
    //设置异常消息回调函数
    NET_DVR_SetExceptionCallBack_V30(0, NULL, g_ExceptionCallBack, NULL);

    //---------------------------------------
    //启动预览并设置回调数据流
    LONG lRealPlayHandle;
    cvNamedWindow("Mywindow", 0);
    cvNamedWindow("IPCamera", 0);

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


    NET_DVR_PREVIEWINFO struPlayInfo = { 0 };
    struPlayInfo.hPlayWnd = h;         //须要SDK解码时句柄设为有效值，仅取流不解码时可设为空
    struPlayInfo.lChannel = 1;           //预览通道号
    struPlayInfo.dwStreamType = 0;       //0-主码流，1-子码流，2-码流3，3-码流4，以此类推
    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);
    //---------------------------------------
    //关闭预览
    NET_DVR_StopRealPlay(lRealPlayHandle);
    //注销用户
    NET_DVR_Logout(lUserID);
    //释放SDK资源
    NET_DVR_Cleanup();

    return;
}