#OpenCV+海康威视摄像头的实时读取
本文由 @lonelyrains出品,转载请注明出处。
文章链接: http://blog.csdn.net/lonelyrains/article/details/50350052
之前没想过会有这么多朋友遇到问题,所以建了 qq群1:536898072 qq群2:1071276535,专门供大家以后一起交流讨论图像和机器学习的工程实践问题。
vx: blade170103
##环境
- 硬件:
PC:i7-4970 16GB内存 摄像头型号:DS-2CD3310D-I(2.8mm) - 软件:
windows-x64、vs2012、opencv2.4.8、hkvision5114-x64版本库
##配置
- 保证使用SADP工具可以识别摄像头,然后配置IP与电脑在同一个网段。
- 再保证可以从浏览器中访问。账号密码默认的一般是admin、a123456789(老版本的摄像头密码是12345)。
登录成功后可能要求下载WebComponent控件,下载好了安装便是。如果仍然出现如下画面:
则换一种浏览器试。一般是默认浏览器没问题的。
- 配置使用sdk中自带的ClientDemo.exe工具可以访问
- 配置sdk开发环境
– opencv的配置
这里不展开讲opencv的配置,仅说明需要配置opencv环境变量、设置好对应的vs开发环境的属性配置
– 海康威视sdk属性配置
因为是64位环境,为了增强属性配置的内聚性,单独添加新项目属性表,设置海康威视sdk的属性
依赖库写全,为:
HCNetSDK.lib;PlayCtrl.lib;ws2_32.lib;winmm.lib;GdiPlus.lib;IPHlpApi.Lib;%(AdditionalDependencies)
##代码及说明
#include <opencv\cv.h>
#include <opencv\highgui.h>#include <iostream>#include <cstdio>
#include <cstring>
#include <iostream>
#include <windows.h>
#include <HCNetSDK.h>
/*#include "PlayM4.h"*/
#include <plaympeg4.h>
#include <opencv2\opencv.hpp>
#include <time.h>#include "global.h"
#include "readCamera.h"#define USECOLOR 1using namespace cv;
using namespace std;//--------------------------------------------
int iPicNum=0;//Set channel NO.
LONG nPort=-1;
HWND hWnd=NULL;void yv12toYUV(char *outYuv, char *inYv12, int width, int height,int widthStep)
{int col,row;unsigned int Y,U,V;int tmp;int idx;//printf("widthStep=%d.\n",widthStep);for (row=0; row<height; row++){idx=row * widthStep;int rowptr=row*width;for (col=0; col<width; col++){//int colhalf=col>>1;tmp = (row/2)*(width/2)+(col/2);// if((row==1)&&( col>=1400 &&col<=1600))// { // printf("col=%d,row=%d,width=%d,tmp=%d.\n",col,row,width,tmp);// printf("row*width+col=%d,width*height+width*height/4+tmp=%d,width*height+tmp=%d.\n",row*width+col,width*height+width*height/4+tmp,width*height+tmp);// } Y=(unsigned int) inYv12[row*width+col];U=(unsigned int) inYv12[width*height+width*height/4+tmp];V=(unsigned int) inYv12[width*height+tmp];// if ((col==200))// { // printf("col=%d,row=%d,width=%d,tmp=%d.\n",col,row,width,tmp);// printf("width*height+width*height/4+tmp=%d.\n",width*height+width*height/4+tmp);// return ;// }if((idx+col*3+2)> (1200 * widthStep)){//printf("row * widthStep=%d,idx+col*3+2=%d.\n",1200 * widthStep,idx+col*3+2);} outYuv[idx+col*3] = Y;outYuv[idx+col*3+1] = U;outYuv[idx+col*3+2] = V;}}//printf("col=%d,row=%d.\n",col,row);
}//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)
{long lFrameType = pFrameInfo->nType; if(lFrameType ==T_YV12){
#if USECOLOR//int start = clock();static IplImage* pImgYCrCb = cvCreateImage(cvSize(pFrameInfo->nWidth,pFrameInfo->nHeight), 8, 3);//得到图像的Y分量 yv12toYUV(pImgYCrCb->imageData, pBuf, pFrameInfo->nWidth,pFrameInfo->nHeight,pImgYCrCb->widthStep);//得到全部RGB图像static IplImage* pImg = cvCreateImage(cvSize(pFrameInfo->nWidth,pFrameInfo->nHeight), 8, 3); cvCvtColor(pImgYCrCb,pImg,CV_YCrCb2RGB); //int end = clock();
#elsestatic IplImage* pImg = cvCreateImage(cvSize(pFrameInfo->nWidth,pFrameInfo->nHeight), 8, 1); memcpy(pImg->imageData,pBuf,pFrameInfo->nWidth*pFrameInfo->nHeight);
#endif//printf("%d\n",end-start);Mat frametemp(pImg),frame;//frametemp.copyTo(frame);
// cvShowImage("IPCamera",pImg);
// cvWaitKey(1);EnterCriticalSection(&g_cs_frameList);g_frameList.push_back(frametemp);LeaveCriticalSection(&g_cs_frameList);#if USECOLOR
// cvReleaseImage(&pImgYCrCb);
// cvReleaseImage(&pImg);
#else/*cvReleaseImage(&pImg);*/
#endif//此时是YV12格式的视频数据,保存在pBuf中,可以fwrite(pBuf,nSize,1,Videofile);//fwrite(pBuf,nSize,1,fp);}/***************else if (lFrameType ==T_AUDIO16){//此时是音频数据,数据保存在pBuf中,可以fwrite(pBuf,nSize,1,Audiofile);}else{}*******************/}///实时流回调
void CALLBACK fRealDataCallBack(LONG lRealHandle,DWORD dwDataType,BYTE *pBuffer,DWORD dwBufSize,void *pUser)
{DWORD dRet;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;}if(dwBufSize > 0){if (!PlayM4_OpenStream(nPort,pBuffer,dwBufSize,1024*1024)){dRet=PlayM4_GetLastError(nPort);break;}//设置解码回调函数 只解码不显示if (!PlayM4_SetDecCallBack(nPort,DecCBFun)){dRet=PlayM4_GetLastError(nPort);break;}//设置解码回调函数 解码且显示//if (!PlayM4_SetDecCallBackEx(nPort,DecCBFun,NULL,NULL))//{// dRet=PlayM4_GetLastError(nPort);// break;//}//打开视频解码if (!PlayM4_Play(nPort,hWnd)){dRet=PlayM4_GetLastError(nPort);break;}//打开音频解码, 需要码流是复合流
// if (!PlayM4_PlaySound(nPort))
// {
// dRet=PlayM4_GetLastError(nPort);
// break;
// } }break;case NET_DVR_STREAMDATA: //码流数据if (dwBufSize > 0 && nPort != -1){BOOL inData=PlayM4_InputData(nPort,pBuffer,dwBufSize);while (!inData){Sleep(10);inData=PlayM4_InputData(nPort,pBuffer,dwBufSize);OutputDebugString(L"PlayM4_InputData failed \n"); }}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;}
}unsigned readCamera(void *param)
{//---------------------------------------// 初始化NET_DVR_Init();//设置连接时间与重连时间NET_DVR_SetConnectTime(2000, 1);NET_DVR_SetReconnect(10000, true);//---------------------------------------// 获取控制台窗口句柄//HMODULE hKernel32 = GetModuleHandle((LPCWSTR)"kernel32");//GetConsoleWindow = (PROCGETCONSOLEWINDOW)GetProcAddress(hKernel32,"GetConsoleWindow");//---------------------------------------// 注册设备LONG lUserID;NET_DVR_DEVICEINFO_V30 struDeviceInfo;lUserID = NET_DVR_Login_V30("192.168.2.64", 8000, "admin", "a123456789", &struDeviceInfo);if (lUserID < 0){printf("Login error, %d\n", NET_DVR_GetLastError());NET_DVR_Cleanup();return -1;}//---------------------------------------//设置异常消息回调函数NET_DVR_SetExceptionCallBack_V30(0, NULL,g_ExceptionCallBack, NULL);//cvNamedWindow("IPCamera");//---------------------------------------//启动预览并设置回调数据流 NET_DVR_CLIENTINFO ClientInfo;ClientInfo.lChannel = 1; //Channel number 设备通道号ClientInfo.hPlayWnd = NULL; //窗口为空,设备SDK不解码只取流ClientInfo.lLinkMode = 0; //Main StreamClientInfo.sMultiCastIP = NULL;LONG lRealPlayHandle;lRealPlayHandle = NET_DVR_RealPlay_V30(lUserID,&ClientInfo,fRealDataCallBack,NULL,TRUE);if (lRealPlayHandle<0){printf("NET_DVR_RealPlay_V30 failed! Error number: %d\n",NET_DVR_GetLastError());return 0;}//cvWaitKey(0);Sleep(-1);//fclose(fp);//---------------------------------------//关闭预览if(!NET_DVR_StopRealPlay(lRealPlayHandle)){printf("NET_DVR_StopRealPlay error! Error number: %d\n",NET_DVR_GetLastError());return 0;}//注销用户NET_DVR_Logout(lUserID);NET_DVR_Cleanup();return 0;
}
其中最终得到的帧保存在g_frameList.push_back(frametemp);中。前后设置了对应的锁,用来对该帧序列的读写进行保护。这一部分内容是要自己完成的。即定义变量:
CRITICAL_SECTION g_cs_frameList;
std::list<Mat> g_frameList;
主函数中的调用代码,先建立线程,调用上述读摄像头的函数的回调,并把读到的帧序列保存在g_frameList中,然后再读取该序列,保存到Mat里即可:
int main()
{ HANDLE hThread;unsigned threadID;Mat frame1;InitializeCriticalSection(&g_cs_frameList);hThread = (HANDLE)_beginthreadex( NULL, 0, &readCamera, NULL, 0, &threadID );...EnterCriticalSection(&g_cs_frameList);if(g_frameList.size()){list<Mat>::iterator it;it = g_frameList.end();it--;Mat dbgframe = (*(it));//imshow("frame from camera",dbgframe);//dbgframe.copyTo(frame1);//dbgframe.release();(*g_frameList.begin()).copyTo(frame[i]);frame1 = dbgframe;g_frameList.pop_front();}g_frameList.clear(); // 丢掉旧的帧LeaveCriticalSection(&g_cs_frameList);...return 0;
}