C/C++教程
在Ubuntu下使用opencv调用海康威视的网络摄像头
经过很多天的配置，终于能在工程中调用海康威视的网络摄像头了，为了后人能快速上手，我整理内容如下：
一、根据电脑的型号下载海康威视的SDK包
网址：http://www.hikvision.com/cn/download_61.html。
我的笔记本时linux64位的，所以下载的 ————设备网络SDK_Linux64
二、 用下面的方法之一配置SDK
如果HCNetSDKCom目录以及libhcnetsdk.so、libhpr.so、libHCCore文件和可执行文件在同一级目录下，则使用同级目录下的库文件;
如果不在同一级目录下，则需要将以上文件的目录加载到动态库搜索路径中，设置的方式有以下几种:
1. 将网络SDK各动态库路径加入到LD_LIBRARY_PATH环境变量
1.在终端输入：export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/XXX:/XXX/HCNetSDKCom 只在当前终端起作用
2. 修改~/.bashrc或~/.bash_profile，最后一行添加 export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/XXX:/XXX/HCNetSDKCom，保存之后，使用source .bashrc执行该文件 ，当前用户生效
3. 修改/etc/profile，添加内容如第2条，同样保存之后使用source执行该文件 所有用户生效
2．在/etc/ld.so.conf文件结尾添加网络sdk库的路径，如/XXX和/XXX/HCNetSDKCom/，保存之后，然后执行ldconfig。
三. 在Ubuntu16.04 的qt中新建一个工程
1. 在工程的 ×.pro文件中添加以下内容：
INCLUDEPATH += /usr/local/include \ /usr/local/include/opencv \ /usr/local/include/opencv2
LIBS += /usr/local/lib/libopencv_calib3d.so
/usr/local/lib/libopencv_ml.so.2.4.9
/usr/local/lib/libopencv_calib3d.so.2.4
/usr/local/lib/libopencv_nonfree.so
/usr/local/lib/libopencv_calib3d.so.2.4.9
/usr/local/lib/libopencv_nonfree.so.2.4
/usr/local/lib/libopencv_contrib.so
/usr/local/lib/libopencv_nonfree.so.2.4.9
/usr/local/lib/libopencv_contrib.so.2.4
/usr/local/lib/libopencv_objdetect.so
/usr/local/lib/libopencv_contrib.so.2.4.9
/usr/local/lib/libopencv_objdetect.so.2.4
/usr/local/lib/libopencv_core.so
/usr/local/lib/libopencv_objdetect.so.2.4.9
/usr/local/lib/libopencv_core.so.2.4
/usr/local/lib/libopencv_ocl.so
/usr/local/lib/libopencv_core.so.2.4.9
/usr/local/lib/libopencv_ocl.so.2.4
/usr/local/lib/libopencv_features2d.so
/usr/local/lib/libopencv_ocl.so.2.4.9
/usr/local/lib/libopencv_features2d.so.2.4
/usr/local/lib/libopencv_photo.so
/usr/local/lib/libopencv_features2d.so.2.4.9
/usr/local/lib/libopencv_photo.so.2.4
/usr/local/lib/libopencv_flann.so
/usr/local/lib/libopencv_photo.so.2.4.9
/usr/local/lib/libopencv_flann.so.2.4
/usr/local/lib/libopencv_stitching.so
/usr/local/lib/libopencv_flann.so.2.4.9
/usr/local/lib/libopencv_stitching.so.2.4
/usr/local/lib/libopencv_gpu.so
/usr/local/lib/libopencv_stitching.so.2.4.9
/usr/local/lib/libopencv_gpu.so.2.4
/usr/local/lib/libopencv_superres.so
/usr/local/lib/libopencv_gpu.so.2.4.9
/usr/local/lib/libopencv_superres.so.2.4
/usr/local/lib/libopencv_highgui.so
/usr/local/lib/libopencv_superres.so.2.4.9
/usr/local/lib/libopencv_highgui.so.2.4
/usr/local/lib/libopencv_highgui.so.2.4.9
/usr/local/lib/libopencv_video.so
/usr/local/lib/libopencv_imgproc.so
/usr/local/lib/libopencv_video.so.2.4
/usr/local/lib/libopencv_imgproc.so.2.4
/usr/local/lib/libopencv_video.so.2.4.9
/usr/local/lib/libopencv_imgproc.so.2.4.9
/usr/local/lib/libopencv_videostab.so
/usr/local/lib/libopencv_legacy.so
/usr/local/lib/libopencv_videostab.so.2.4
/usr/local/lib/libopencv_legacy.so.2.4
/usr/local/lib/libopencv_videostab.so.2.4.9
/usr/local/lib/libopencv_legacy.so.2.4.9
/usr/local/lib/libopencv_ml.so
INCLUDEPATH += /home/ding/opencvprojects/CH_HCNetSDK_V5.2.7.4build20170606_Linux64/incCn
LIBS += /home/ding/opencv_projects/CH_HCNetSDK_V5.2.7.4_build20170606_Linux64/lib/libhcnetsdk.so</span>
/home/ding/opencv_projects/CH_HCNetSDK_V5.2.7.4_build20170606_Linux64/lib/libHCCore.so</span>
/home/ding/opencv_projects/CH_HCNetSDK_V5.2.7.4_build20170606_Linux64/lib/libhpr.so</span>
/home/ding/opencv_projects/CH_HCNetSDK_V5.2.7.4_build20170606_Linux64/lib/libPlayCtrl.so</span>
/home/ding/opencv_projects/CH_HCNetSDK_V5.2.7.4_build20170606_Linux64/lib/libSuperRender.so</span>
/home/ding/opencv_projects/CH_HCNetSDK_V5.2.7.4_build20170606_Linux64/lib/libAudioRender.so2. 在main.cpp函数中添加以下内容：
#include "opencv2/opencv.hpp"
#include <QDir>
#include <fstream>
#include <unistd.h>
//#include "auto_entercs.h"
#include "HCNetSDK.h"
#include "PlayM4.h"
#include "LinuxPlayM4.h"
#define HPR_ERROR -1
#define HPR_OK 0
#define USECOLOR 0
static cv::Mat dst;
HWND h =
NULL;
LONG nPort=
-1;
LONG lUserID;
pthread_mutex_t mutex;
std::
list<cv::Mat> g_frameList;
FILE *g_pFile =
NULL;
void CALLBACK PsDataCallBack(LONG lRealHandle, DWORD dwDataType,BYTE *pPacketBuffer,DWORD nPacketSize, void* pUser)
{
if (dwDataType == NET_DVR_SYSHEAD)
{
//写入头数据
g_pFile = fopen(
"/home/lds/source/ps.dat",
"wb");
if (g_pFile ==
NULL)
{
printf(
"CreateFileHead fail\n");
return;
}
//写入头数据
fwrite(pPacketBuffer,
sizeof(
unsigned
char), nPacketSize, g_pFile);
printf(
"write head len=%d\n", nPacketSize);
}
else
{
if(g_pFile !=
NULL)
{
fwrite(pPacketBuffer,
sizeof(
unsigned
char), nPacketSize, g_pFile);
printf(
"write data len=%d\n", nPacketSize);
}
}
}
//void CALLBACK DecCBFun(LONG nPort, char *pBuf, LONG nSize, FRAME_INFO *pFrameInfo, LONG nReserved1, LONG nReserved2)
void CALLBACK DecCBFun(LONG nPort, char *pBuf, LONG nSize, FRAME_INFO *pFrameInfo, void* nReserved1, LONG nReserved2)
{
long lFrameType = pFrameInfo->nType;
if (lFrameType == T_YV12)
{
//cv::Mat dst(pFrameInfo->nHeight, pFrameInfo->nWidth,
// CV_8UC3); // 8UC3表示8bit uchar无符号类型,3通道值
dst.create(pFrameInfo->nHeight, pFrameInfo->nWidth,
CV_8UC3);
cv::Mat src(pFrameInfo->nHeight + pFrameInfo->nHeight / 2, pFrameInfo->nWidth, CV_8UC1, (uchar *)pBuf);
cv::cvtColor(src, dst, CV_YUV2BGR_YV12);
pthread_mutex_lock(&mutex);
g_frameList.push_back(dst);
pthread_mutex_unlock(&mutex);
}
usleep(
1000);
//cv::Mat src(pFrameInfo->nHeight + pFrameInfo->nHeight / 2, pFrameInfo->nWidth, CV_8UC1, (uchar *)pBuf);
//cv::cvtColor(src, dst, CV_YUV2BGR_YV12);
//cv::imshow("bgr", dst);
//pthread_mutex_lock(&mutex);
//g_frameList.push_back(dst);
//pthread_mutex_unlock(&mutex);
//vw << dst;
//cv::waitKey(10);
}
void CALLBACK g_RealDataCallBack_V30(LONG lRealHandle, DWORD dwDataType, BYTE *pBuffer, DWORD dwBufSize,void* dwUser)
{
/*
if (dwDataType == 1)
{
PlayM4_GetPort(&nPort);
PlayM4_SetStreamOpenMode(nPort, STREAME_REALTIME);
PlayM4_OpenStream(nPort, pBuffer, dwBufSize, 1024 * 1024);
PlayM4_SetDecCallBackEx(nPort, DecCBFun, NULL, NULL);
PlayM4_Play(nPort, h);
}
else
{
BOOL inData = PlayM4_InputData(nPort, pBuffer, dwBufSize);
}*/
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_SetStreamOpenMode(nPort, STREAME_REALTIME)) {
dRet = PlayM4_GetLastError(nPort);
break;
}
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, h))
{
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;
//usleep(500);
case NET_DVR_STREAMDATA:
//码流数据
if (dwBufSize >
0 && nPort !=
-1) {
BOOL inData = PlayM4_InputData(nPort, pBuffer, dwBufSize);
while (!inData) {
sleep(
100);
inData = PlayM4_InputData(nPort, pBuffer, dwBufSize);
std::
cerr <<
"PlayM4_InputData failed \n" <<
std::
endl;
}
}
break;
}
}
void CALLBACK g_ExceptionCallBack(DWORD dwType, LONG lUserID, LONG lHandle, void *pUser)
{
char tempbuf[
256] = {
0};
std::
cout <<
"EXCEPTION_RECONNECT = " << EXCEPTION_RECONNECT <<
std::
endl;
switch(dwType)
{
case EXCEPTION_RECONNECT:
//预览时重连
printf(
"pyd----------reconnect--------%d\n", time(
NULL));
break;
default:
break;
}
}
void *RunIPCameraInfo(void *)
{
char IP[] =
"192.168.**.***";
//海康威视网络摄像头的ip
char UName[] =
"****";
//海康威视网络摄像头的用户名
char PSW[] =
"*****";
//海康威视网络摄像头的密码
NET_DVR_Init();
NET_DVR_SetConnectTime(
2000,
1);
NET_DVR_SetReconnect(
1000,
true);
NET_DVR_SetLogToFile(
3,
"./sdkLog");
NET_DVR_DEVICEINFO_V30 struDeviceInfo = {
0};
NET_DVR_SetRecvTimeOut(
5000);
lUserID = NET_DVR_Login_V30(IP,
8000, UName, PSW, &struDeviceInfo);
NET_DVR_SetExceptionCallBack_V30(
0,
NULL, g_ExceptionCallBack,
NULL);
long lRealPlayHandle;
NET_DVR_CLIENTINFO ClientInfo = {
0};
ClientInfo.lChannel =
1;
ClientInfo.lLinkMode =
0;
ClientInfo.hPlayWnd =
0;
ClientInfo.sMultiCastIP =
NULL;
//lRealPlayHandle = NET_DVR_RealPlay_V30(lUserID, &ClientInfo, PsDataCallBack, NULL, 0);
lRealPlayHandle = NET_DVR_RealPlay_V30(lUserID, &ClientInfo, g_RealDataCallBack_V30,
NULL,
0);
//NET_DVR_SaveRealData(lRealPlayHandle, "/home/lds/source/yuntai.mp4");
if (lRealPlayHandle <
0)
{
printf(
"pyd1---NET_DVR_RealPlay_V30 error\n");
}
sleep(
-1);
NET_DVR_Cleanup();
}
int main(int argc, char *argv[])
{
pthread_t getframe;
pthread_mutex_init(&mutex,
NULL);
int ret;
ret = pthread_create(&getframe,
NULL, RunIPCameraInfo,
NULL);
if(ret!=
0)
{
printf(
"Create pthread error!\n");
}
cv::Mat image;
while(
1)
{
pthread_mutex_lock(&mutex);
if(g_frameList.size())
{
std::
list<cv::Mat>::iterator it;
it = g_frameList.end();
it--;
image = (*(it));
if (!image.empty())
{
imshow(
"frame from camera",image);
cv::waitKey(
1);
}
g_frameList.pop_front();
}
g_frameList.clear();
// 丢掉旧的帧
pthread_mutex_unlock(&mutex);
}
return
0;
}
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