Log file

user@admin: $  g++  -std=c++11 CameraStreamer.hpp CameraStreamer.cpp MultiCamera.cpp `pkg-config opencv --cflags --libs`

CameraStreamer.hpp:1:9: warning: #pragma once in main file [enabled by default]
 #pragma once
         ^
In file included from CameraStreamer.hpp:7:0:
videoio.hpp:389:20: error: redefinition of ‘class cv::VideoCapture’
 class CV_EXPORTS_W VideoCapture
                    ^
In file included from /usr/local/include/opencv2/opencv.hpp:58:0,
                 from videoio.hpp:46,
                 from CameraStreamer.hpp:7:
/usr/local/include/opencv2/highgui/highgui.hpp:204:20: error: previous definition of ‘class cv::VideoCapture’
 class CV_EXPORTS_W VideoCapture
                    ^
In file included from CameraStreamer.hpp:7:0:
videoio.hpp:580:20: error: redefinition of ‘class cv::VideoWriter’
 class CV_EXPORTS_W VideoWriter
                    ^
In file included from /usr/local/include/opencv2/opencv.hpp:58:0,
                 from videoio.hpp:46,
                 from CameraStreamer.hpp:7:
/usr/local/include/opencv2/highgui/highgui.hpp:230:20: error: previous definition of ‘class cv::VideoWriter’
 class CV_EXPORTS_W VideoWriter
                    ^
In file included from CameraStreamer.hpp:7:0:
videoio.hpp:673:42: error: expected initializer before ‘<’ token
 template<> CV_EXPORTS void DefaultDeleter<CvCapture>::operator ()(CvCapture* obj) const;
                                          ^
videoio.hpp:674:42: error: expected initializer before ‘<’ token
 template<> CV_EXPORTS void DefaultDeleter<CvVideoWriter>::operator ()(CvVideoWriter* obj) const;
                                          ^
CameraStreamer.hpp:11:17: error: ‘concurrency’ is not a namespace-name
 using namespace concurrency;
                 ^
CameraStreamer.hpp:11:28: error: expected namespace-name before ‘;’ token
 using namespace concurrency;
                            ^
CameraStreamer.hpp:22:12: error: ‘concurrent_queue’ was not declared in this scope
     vector<concurrent_queue<Mat>*> frame_queue;
            ^
CameraStreamer.hpp:22:12: note: suggested alternatives:
In file included from /usr/include/tbb/concurrent_queue.h:32:0,
                 from CameraStreamer.hpp:6:
/usr/include/tbb/internal/_concurrent_queue_impl.h:63:40: note:   ‘tbb::strict_ppl::concurrent_queue’
 template<typename T, typename A> class concurrent_queue;
                                        ^
/usr/include/tbb/internal/_concurrent_queue_impl.h:63:40: note:   ‘tbb::strict_ppl::concurrent_queue’
/usr/include/tbb/internal/_concurrent_queue_impl.h:69:40: note:   ‘tbb::deprecated::concurrent_queue’
 template<typename T, typename A> class concurrent_queue;
                                        ^
CameraStreamer.hpp:22:32: error: template argument 1 is invalid
     vector<concurrent_queue<Mat>*> frame_queue;
                                ^
CameraStreamer.hpp:22:32: error: template argument 2 is invalid
CameraStreamer.hpp:22:34: error: expected unqualified-id before ‘>’ token
     vector<concurrent_queue<Mat>*> frame_queue;
                                  ^
CameraStreamer.hpp:22:33: error: expected ‘;’ at end of member declaration
     vector<concurrent_queue<Mat>*> frame_queue;
                                 ^
CameraStreamer.hpp:22:34: error: expected unqualified-id before ‘>’ token
     vector<concurrent_queue<Mat>*> frame_queue;
                                  ^
CameraStreamer.cpp:3:17: error: ‘concurrent’ is not a namespace-name
 using namespace concurrent;
                 ^
CameraStreamer.cpp:3:27: error: expected namespace-name before ‘;’ token
 using namespace concurrent;
                           ^
CameraStreamer.cpp: In member function ‘void CameraStreamer::captureFrame(int)’:
CameraStreamer.cpp:36:9: error: ‘frame_queue’ was not declared in this scope
         frame_queue[index]->push(frame);
         ^
CameraStreamer.cpp: In member function ‘void CameraStreamer::startMultiCapture()’:
CameraStreamer.cpp:46:5: error: ‘concurrent_queue’ was not declared in this scope
     concurrent_queue<Mat> *q;
     ^
CameraStreamer.cpp:46:5: note: suggested alternatives:
In file included from /usr/include/tbb/concurrent_queue.h:32:0,
                 from CameraStreamer.hpp:6:
/usr/include/tbb/internal/_concurrent_queue_impl.h:63:40: note:   ‘tbb::strict_ppl::concurrent_queue’
 template<typename T, typename A> class concurrent_queue;
                                        ^
/usr/include/tbb/internal/_concurrent_queue_impl.h:63:40: note:   ‘tbb::strict_ppl::concurrent_queue’
/usr/include/tbb/internal/_concurrent_queue_impl.h:69:40: note:   ‘tbb::deprecated::concurrent_queue’
 template<typename T, typename A> class concurrent_queue;
                                        ^
CameraStreamer.cpp:46:25: error: expected primary-expression before ‘>’ token
     concurrent_queue<Mat> *q;
                         ^
CameraStreamer.cpp:46:28: error: ‘q’ was not declared in this scope
     concurrent_queue<Mat> *q;
                            ^
CameraStreamer.cpp:71:17: error: expected type-specifier before ‘concurrent_queue’
         q = new concurrent_queue<Mat>;
                 ^
CameraStreamer.cpp:71:17: error: expected ‘;’ before ‘concurrent_queue’
CameraStreamer.cpp:74:9: error: ‘frame_queue’ was not declared in this scope
         frame_queue.push_back(q);
         ^
MultiCamera.cpp:4:11: error: ‘::main’ must return ‘int’
 void main()
           ^
MultiCamera.cpp: In function ‘int main()’:
MultiCamera.cpp:34:21: error: ‘class CameraStreamer’ has no member named ‘frame_queue’
             if (cam.frame_queue[i]->try_pop(frame)){