获取监控摄像头视频流可以采用rtsp快速获取，但是该方案可能出现延时较大的情况，而采用海康威视提供的SDK可以降低延时。
#include <stdio.h>
#include <sys/time.h>
#include <chrono>
#include <opencv2/opencv.hpp>
#include <unistd.h>
#include <errno.h>
#include "HCNetSDK.h"
#include "iniFile.h"
#include "PlayM4.h"//解码回调 视频为YUV数据(YV12)，音频为PCM数据
void CALLBACK G_DecCBFun(int nPort, char * pBuf, int nSize, FRAME_INFO * pFrameInfo, void* nReserved1, int nReserved2)
{// std::cout << "****************" << std::endl;long lFrameType = pFrameInfo->nType;if (lFrameType == T_YV12){cv::Mat pImg(pFrameInfo->nHeight, pFrameInfo->nWidth, CV_8UC3);cv::Mat src(pFrameInfo->nHeight + pFrameInfo->nHeight / 2, pFrameInfo->nWidth, CV_8UC1, pBuf);cv::cvtColor(src, pImg, cv::COLOR_YUV2BGR_YV12);cv::Mat img = pImg.clone();cv::resize(img, img, cv::Size(0, 0), 0.5, 0.5);cv::imshow("image", img);cv::waitKey(10);}
}LONG G_nPort = -1;
void PsDataCallBack(LONG lRealHandle, DWORD dwDataType, BYTE *pPacketBuffer, DWORD nPacketSize, void* pUser)
{switch (dwDataType){case NET_DVR_SYSHEAD: //系统头if (!PlayM4_GetPort(&G_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，下次回调数据时即使用此port号播放if (nPacketSize > 0){if (!PlayM4_SetStreamOpenMode(G_nPort, STREAME_REALTIME)) //设置实时流播放模式{break;}if (!PlayM4_OpenStream(G_nPort, pPacketBuffer, nPacketSize, 10 * 1024 * 1024)) //打开流接口{break;}if (!PlayM4_Play(G_nPort, NULL)) //播放开始{break;}if (!PlayM4_SetDecCallBack(G_nPort, G_DecCBFun)){break;}}break;case NET_DVR_STREAMDATA: //码流数据if (nPacketSize > 0 && G_nPort != -1){if (!PlayM4_InputData(G_nPort, pPacketBuffer, nPacketSize)){// std::cout << "error" << PlayM4_GetLastError(G_nPort) << std::endl;break;}}break;default: //其他数据if (nPacketSize > 0 && G_nPort != -1){if (!PlayM4_InputData(G_nPort, pPacketBuffer, nPacketSize)){break;}}break;}
}void GetStream()
{std::vector<std::string> paths;paths.push_back("../config/Device.ini"); // 配置信息for(int k=0; k<1; k++){// 从配置文件读取设备信息 IniFile ini(paths.at(k).c_str());unsigned int dwSize = 0;char sSection[16] = "DEVICE";char *sIP = ini.readstring(sSection, "ip", "error", dwSize);int iPort = ini.readinteger(sSection, "port", 0);char *sUserName = ini.readstring(sSection, "username", "error", dwSize); char *sPassword = ini.readstring(sSection, "password", "error", dwSize);int iChannel = ini.readinteger(sSection, "channel", 0);NET_DVR_DEVICEINFO_V30 struDeviceInfo;int iUserID = NET_DVR_Login_V30(sIP, iPort, sUserName, sPassword, &struDeviceInfo);std::cout << iUserID << std::endl;if(iUserID >= 0){NET_DVR_PREVIEWINFO struPreviewInfo = {0};struPreviewInfo.lChannel =iChannel;struPreviewInfo.dwStreamType = 0;struPreviewInfo.dwLinkMode = 0;struPreviewInfo.bBlocked = 1;struPreviewInfo.bPassbackRecord = 1;LONG nPort = -1;int iRealPlayHandle = NET_DVR_RealPlay_V40(iUserID, &struPreviewInfo, PsDataCallBack, &nPort);if(iRealPlayHandle >= 0){printf("[GetStream]---RealPlay %s:%d success, \n", sIP, iChannel, NET_DVR_GetLastError());}else{printf("[GetStream]---RealPlay %s:%d failed, error = %d\n", sIP, iChannel, NET_DVR_GetLastError());}}else{printf("[GetStream]---Login %s failed, error = %d\n", sIP, NET_DVR_GetLastError());}}
}int main()
{NET_DVR_Init();GetStream();char c = 0;while('q' != c){printf("input 'q' to quit\n");printf("input: ");scanf("%c", &c);}NET_DVR_Cleanup();return 0;
}
在该程序中，将监控信息作为配置文件，方便修改
[DEVICE]
ip = 192.168.1.100 //
port = 8000 //
username = admin //
password = passwd //
channel = 1 //
x64平台源码
arm平台源码
