海康摄像头实时读取+opencv显示

程序说明：
程序将海康摄像头开发需要进行的操作封面到类HK_camera中，使用只需要在mian()函数中实例化HK_camera，将摄像头的IP，用户名，密码给对象即可使用。
程序调用接口的流程都是参考SDK开发文档，并做了简单的修改，有不明白或者觉得不对的地方希望可以给我留言，谢谢。

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环境：
摄像机型号：CS-C1-11WPFR
电脑环境：32位
opencv版本：opencv 2.4.9
网络SDK开发包版本：CH-HCNetSDK(Windows32)V5.2.7.5_build20170217
播放SDK开发包版本：PlayCtrl_V7.3.2.50_win32_Build20160816

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SDK说明：
播放和网络SDK都是我在官网上下载的，文件里有关于库的说明文档，还有实例程序的说明文档。

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程序：

HK_camera.h

#pragma once#include "include\HCNetSDK.h"#include "include\PlayM4.h"#include "include\plaympeg4.h"#include <opencv2\core\core.hpp>#include <opencv2\highgui\highgui.hpp>#include <opencv2\imgproc\imgproc.hpp>using namespace cv;using namespace std;class HK_camera{public:    HK_camera(void);    ~HK_camera(void);public:    bool Init();                  //初始化    bool Login(char* sDeviceAddress, char* sUserName, char* sPassword, WORD wPort);            //登陆    void show();                  //显示图像private:    LONG lUserID;};

HK_camera.cpp

#include "HK_camera.h"#include <iostream>//全局变量LONG g_nPort;Mat g_BGRImage;void CALLBACK DecCBFun(long nPort, char* pBuf, long nSize, FRAME_INFO* pFrameInfo, long nUser, long nReserved2){    if(pFrameInfo->nType == T_YV12)    {        std::cout << "the frame infomation is T_YV12" << std::endl;        if(g_BGRImage.empty())        {            g_BGRImage.create(pFrameInfo->nHeight, pFrameInfo->nWidth, CV_8UC3);        }        Mat YUVImage(pFrameInfo->nHeight + pFrameInfo->nHeight/2, pFrameInfo->nWidth, CV_8UC1, (unsigned char*)pBuf);        cvtColor(YUVImage, g_BGRImage, COLOR_YUV2BGR_YV12);        imshow("RGBImage", g_BGRImage);        waitKey(15);        YUVImage.~Mat();    }}void CALLBACK g_RealDataCallBack_V30(LONG lPlayHandle, DWORD dwDataType, BYTE *pBuffer, DWORD dwBufSize, void* pUser){    if(dwDataType == NET_DVR_STREAMDATA)    {        if(dwBufSize > 0 && g_nPort != -1)        {                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                if(!PlayM4_InputData(g_nPort, pBuffer, dwBufSize))            {                std::cout << "fail input data" << std::endl;            }            else            {                std::cout << "success input data" << std::endl;            }        }    }}HK_camera::HK_camera(void){}HK_camera::~HK_camera(void){}bool HK_camera::Init(){    if(NET_DVR_Init())    {        return true;    }    else    {        return false;    }}bool HK_camera::Login(char* sDeviceAddress, char* sUserName, char* sPassword, WORD wPort){    NET_DVR_USER_LOGIN_INFO pLoginInfo = {0};    NET_DVR_DEVICEINFO_V40 lpDeviceInfo = {0};    pLoginInfo.bUseAsynLogin = 0;     //同步登录方式    strcpy(pLoginInfo.sDeviceAddress, sDeviceAddress);    strcpy(pLoginInfo.sUserName, sUserName);    strcpy(pLoginInfo.sPassword, sPassword);    pLoginInfo.wPort = wPort;    lUserID = NET_DVR_Login_V40(&pLoginInfo, &lpDeviceInfo);    if(lUserID < 0)    {        return false;    }    else    {        return true;    }}void HK_camera::show(){    if(PlayM4_GetPort(&g_nPort))            //获取播放库通道号    {        if(PlayM4_SetStreamOpenMode(g_nPort, STREAME_REALTIME))      //设置流模式        {            if(PlayM4_OpenStream(g_nPort, NULL, 0, 1024*1024))         //打开流            {                if(PlayM4_SetDecCallBackExMend(g_nPort, DecCBFun, NULL, 0, NULL))                {                     if(PlayM4_Play(g_nPort, NULL))                     {                         std::cout << "success to set play mode" << std::endl;                     }                     else                     {                         std::cout << "fail to set play mode" << std::endl;                     }                }                else                {                     std::cout << "fail to set dec callback " << std::endl;                }            }             else            {                std::cout << "fail to open stream" << std::endl;            }        }        else        {            std::cout << "fail to set stream open mode" << std::endl;        }    }    else    {        std::cout << "fail to get port" << std::endl;    }    NET_DVR_PREVIEWINFO struPlayInfo = {0};    struPlayInfo.hPlayWnd = NULL;    struPlayInfo.lChannel = 1;    struPlayInfo.dwStreamType = 0;    struPlayInfo.dwLinkMode = 0;    struPlayInfo.bBlocked = 1;    if(NET_DVR_RealPlay_V40(lUserID, &struPlayInfo, g_RealDataCallBack_V30, NULL))    {        namedWindow("RGBImage");    }}

main()函数调用方法：

#include "HK_camera.h"#include <iostream>#include <Windows.h>using namespace std;int main(){    HK_camera camera;    if(camera.Init())    {        cout << "init success" << endl;        if(camera.Login("192.168.0.15", "admin", "ULCGUX", 8000))        {            cout << "login success" <<endl;            camera.show();        }        else        {            cout << "login fail" << endl;        }    }    else    {        cout << "init fail" <<endl;    }    while(1)    {    }    return 0;}

补充：希望可以给大家开发带来便利和收获，谢谢您的阅读。