#include <string>#include <sstream>#include <opencv2/core.hpp>#include <opencv2/highgui.hpp>#include <opencv2/videoio.hpp> using namespace cv;using namespace std;const char* keys = {  "{help h usage ? | | print this message}"  "{@video | | Video file, if not defined try to use webcamera}"};int main(int argc, const char** argv){  CommandLineParser parser(argc, argv, keys);  parser.about("Reading a video and camera v1.0.0");  if (parser.has("help"))  {    parser.printMessage();    return 0;  }  String videoFile = parser.get<String>(0);  if (!parser.check())  {    parser.printErrors();    return 0;  }  VideoCapture cap;   if (videoFile != "")  {    cap.open(videoFile);// read a video file  }else {    cap.open(0);// read the default caera  }  if (!cap.isOpened())// check if we succeeded  {    return -1;  }  namedWindow("Video", 1);  while (1)  {    Mat frame;    cap >> frame; // get a new frame from camera    imshow("Video", frame);    if (waitKey(30) >= 0) break;  }  // Release the camera or video file  cap.release();  return 0;}

project(test)cmake_minimum_required(VERSION 2.8.7)# option to enable OpenMP; only relevant for the KCF version with the# VOT scale estimationoption(WITH_OPENMP "Enable OpenMP" OFF)if(WITH_OPENMP)  find_package(OpenMP REQUIRED)  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${OpenMP_EXE_LINKER_FLAGS}")endif(WITH_OPENMP)# add c++11 supportif(CMAKE_COMPILER_IS_GNUCC)  ADD_DEFINITIONS ( -std=c++11 )endif(CMAKE_COMPILER_IS_GNUCC)# add OpenCVset(OPENCV_DIR_HINT "")if(WIN32)  get_filename_component(OPENCV_DIR_PLATFORM $ENV{OPENCV_DIR} DIRECTORY)  get_filename_component(OPENCV_DIR_HINT ${OPENCV_DIR_PLATFORM} DIRECTORY)endif(WIN32)set(OpenCV_STATIC OFF)find_package(OpenCV REQUIRED HINTS ${OPENCV_DIR_HINT})

> cd test> g++ test.cpp -o test `pkg-config --cflags --libs opencv`> ./test