Revision history [back]

The camera is not working

I'm new and just starting to learn OpenCV. I do not initialize the camera while capturing the image, I tried different cameras, but there is no result, even a window with a black screen does not show (in the screenshots of 2 differently implemented programs and their assemblies) P.S (OpenCV - 3.41, Linux ubuntu 18.04) image description (/upfiles/1531772309288639.jpg)(/upfiles/1531772296699289.jpg)(/upfiles/15317722837398883.jpg)

The camera is not working

I'm new and just starting to learn OpenCV. I do not initialize the camera while capturing the image, I tried different cameras, but there is no result, even a window with a black screen does not show (in the screenshots of 2 differently implemented programs and their assemblies) P.S (OpenCV - 3.41, Linux ubuntu ~~18.04)(/upfiles/1531772309288639.jpg)(/upfiles/1531772296699289.jpg)(/upfiles/15317722837398883.jpg)~~18.04

The camera is not working

I'm new and just starting to learn OpenCV. ~~I do~~ The camera is not ~~initialize the camera while capturing the image,~~ initialized during image capture I tried different cameras, but there is no result, even a window with a black screen does not ~~show (in~~ show. Below information about the ~~screenshots of 2 differently implemented programs and their assemblies)~~ video:

program text:

include <opencv2 opencv.hpp="">

include <iostream>

int main( int argc, char** argv ) { cv::namedWindow( "Example10", cv::WINDOW_AUTOSIZE );

cv::VideoCapture cap;

if (argc == 1) cap.open(0); else cap.open( argv[1] );

// std::cout << cv::getBuildInformation() << std:: endl; if (!cap.isOpened()) { std::cerr << "Ошибка при открытии устройства захвата." << std::endl; return -1; }

cv::Mat frame;

for (;;) { cap >> frame; if (frame.empty()) break; cv::imshow( "Example10", frame ); if (cv::waitKey(33) == 27) break; }

return 0; }

P.S (OpenCV - ~~3.41,~~ 3.4.1, Linux ubuntu ~~18.04~~18.04)

The camera is not working

I'm new and just starting to learn OpenCV. The camera is not initialized during image capture I tried different cameras, but there is no result, even a window with a black screen does not show. Below information about the video:

Video I/O: DC1394: YES (ver 2.2.5) FFMPEG: YES avcodec: YES (ver 57.107.100) avformat: YES (ver 57.83.100) avutil: YES (ver 55.78.100) swscale: YES (ver 4.8.100) avresample: YES (ver 3.7.0) GStreamer: NO gPhoto2: YES YES program text: include <opencv2 opencv.hpp=""> include <iostream> text: #include <opencv2/opencv.hpp> #include <iostream> int main( int argc, char** argv ) { cv::namedWindow( "Example10", cv::WINDOW_AUTOSIZE ); ); cv::VideoCapture cap; cap; if (argc == 1) cap.open(0); else cap.open( argv[1] ); ); // std::cout << cv::getBuildInformation() << std:: endl; if (!cap.isOpened()) { std::cerr << "Ошибка при открытии устройства захвата." << std::endl; return -1; } cv::Mat frame; frame; for (;;) { cap >> frame; if (frame.empty()) break; cv::imshow( "Example10", frame ); if (cv::waitKey(33) == 27) break; } } return 0; }}

P.S (OpenCV - 3.4.1, Linux ubuntu 18.04)

The camera is not working

 Video I/O:
    DC1394:                      YES (ver 2.2.5)
    FFMPEG:                      YES
      avcodec:                   YES (ver 57.107.100)
      avformat:                  YES (ver 57.83.100)
      avutil:                    YES (ver 55.78.100)
      swscale:                   YES (ver 4.8.100)
      avresample:                YES (ver 3.7.0)
    GStreamer:                   NO
    gPhoto2:                     YES

program ~~text:~~ text:

#include <opencv2/opencv.hpp>
#include <iostream>

int main( int argc, char** argv )
{
   cv::namedWindow( "Example10", cv::WINDOW_AUTOSIZE );

   cv::VideoCapture cap;

   if (argc == 1)
   cap.open(0);
   else cap.open( argv[1] );

  // std::cout << cv::getBuildInformation() << std:: endl;
   if (!cap.isOpened())
   { 
       std::cerr << "Ошибка при открытии устройства захвата." << std::endl;
       return -1;
   } 

   cv::Mat frame;

   for (;;)
   {
      cap >> frame;
      if (frame.empty()) break;
      cv::imshow( "Example10", frame );
      if (cv::waitKey(33) == 27) break;
   }

  return 0;
}

P.S (OpenCV - 3.4.1, Linux ubuntu 18.04)

The camera is not working

program text:

#include <opencv2/opencv.hpp> #include <iostream> include <opencv2 opencv.hpp=""> include <iostream> int main( int argc, char** argv ) { cv::namedWindow( "Example10", cv::WINDOW_AUTOSIZE ); ); cv::VideoCapture cap; cap; if (argc == 1) cap.open(0); 1) cap.open(0); else cap.open( argv[1] ); // std::cout << cv::getBuildInformation() << std:: endl; ); if (!cap.isOpened()) { std::cerr << "Ошибка при открытии устройства захвата." "Error." << std::endl; return -1; } cv::Mat frame; frame; for (;;) { { cap >> frame; if (frame.empty()) break; cv::imshow( "Example10", frame ); if (cv::waitKey(33) == 27) break; } }
return 0; }
}

P.S (OpenCV - 3.4.1, Linux ubuntu 18.04)

The camera is not working

program text:

include <opencv2 opencv.hpp="">

include <iostream>

int main( int argc, char** argv ) { cv::namedWindow( "Example10", cv::WINDOW_AUTOSIZE );

); cv::VideoCapture ~~cap;~~

cap; if (argc == 1)

cap.open(0);

1) cap.open(0); else cap.open( argv[1] );

); if (!cap.isOpened()) { std::cerr << "Error." << std::endl; return -1; }

cv::Mat ~~frame;~~

frame; for (;;) {

{
      cap >> frame;
   if (frame.empty()) break;
   cv::imshow( "Example10", frame );
   if (cv::waitKey(33) == 27) break;

}

} return 0; }

P.S (OpenCV - 3.4.1, Linux ubuntu 18.04)

The camera is not working

program text:

include <opencv2 opencv.hpp="">

include <iostream>

int main( int argc, char** argv ) { cv::namedWindow( "Example10", cv::WINDOW_AUTOSIZE ); );

cv::VideoCapture ~~cap;~~ cap;

if (argc == 1) ~~cap.open(0); else~~ cap.open(0);

else cap.open( argv[1] ); );

if (!cap.isOpened()) { std::cerr << "Error." << std::endl; return -1; }

cv::Mat ~~frame;~~ frame;

for (;;) { cap >> frame; if (frame.empty()) break; cv::imshow( "Example10", frame ); if (cv::waitKey(33) == 27) break; } }

return 0; }

P.S (OpenCV - 3.4.1, Linux ubuntu 18.04)

The camera is not working

Video I/O: DC1394: YES (ver 2.2.5) FFMPEG: YES avcodec: YES (ver 57.107.100) avformat: YES (ver 57.83.100) avutil: YES (ver 55.78.100) swscale: YES (ver 4.8.100) avresample: YES (ver 3.7.0) GStreamer: NO gPhoto2: YESYES

program text:
include <opencv2 opencv.hpp="">

include <iostream>

#include <opencv2/opencv.hpp> #include <iostream> int main( int argc, char** argv ) { cv::namedWindow( "Example10", cv::WINDOW_AUTOSIZE ); ); cv::VideoCapture cap; cap; if (argc == 1) cap.open(0); cap.open(0); else cap.open( argv[1] ); ); if (!cap.isOpened()) { std::cerr << "Error." << std::endl; return -1; } cv::Mat frame; frame; for (;;) { cap >> frame; if (frame.empty()) break; cv::imshow( "Example10", frame ); if (cv::waitKey(33) == 27) break; } } return 0; }}

P.S (OpenCV - 3.4.1, Linux ubuntu 18.04)

The camera is not working

program text:

#include <opencv2/opencv.hpp> #include <iostream> include <opencv2 opencv.hpp=""> include <iostream> int main( int argc, char** argv ) { { cv::namedWindow( "Example10", cv::WINDOW_AUTOSIZE ); cv::VideoCapture cap; if (argc == 1) cap.open(0); else cap.open( argv[1] ); if (!cap.isOpened()) { std::cerr << "Error." << std::endl; return -1; } cv::Mat frame; for (;;) { cap >> frame; if (frame.empty()) break; cv::imshow( "Example10", frame ); if (cv::waitKey(33) == 27) break; } return 0; } P.S (OpenCV - 3.4.1, Linux ubuntu 18.04)

          11    None 
      updated 
2018-07-18 01:47:32 -0600
 
    berak 
 32993  ●7 ●81 ●312  
 
 
 
  
 
 
 
  The camera is not working
 I'm new and just starting to learn OpenCV. The camera is not initialized during image capture I tried different cameras, but there is no result, even a window with a black screen does not show.
Below information about the video:
 
 Video I/O:
DC1394: YES (ver 2.2.5)
FFMPEG: YES
avcodec: YES (ver 57.107.100)
avformat: YES (ver 57.83.100)
avutil: YES (ver 55.78.100)
swscale: YES (ver 4.8.100)
avresample: YES (ver 3.7.0)
GStreamer: NO
gPhoto2: YESYES
 program text:
 include <opencv2 opencv.hpp="">
 include <iostream>
 
#include <opencv2/opencv.hpp>
#include <iostream>

int main( int argc, char** argv )
{
 {
 cv::namedWindow( "Example10", cv::WINDOW_AUTOSIZE );
 cv::VideoCapture cap;
  if (argc == 1)
 cap.open(0);
 else
  cap.open( argv[1] );
 if (!cap.isOpened())
 {
  std::cerr << "Error." << std::endl;
 return -1;
 }
  cv::Mat frame;
 for (;;)
 {
  cap >> frame;
 if (frame.empty()) break;
  cv::imshow( "Example10", frame );
  if (cv::waitKey(33) == 27) break;
 }
  return 0;
 }
 P.S (OpenCV - 3.4.1, Linux ubuntu 18.04)
 
 
 
          12    retagged 
      updated 
2018-07-30 06:34:19 -0600
 
    Eduardo 
 3589  ●1 ●15 ●41  
 
 
 
  
 
 
 
  The camera is not working
 I'm new and just starting to learn OpenCV. The camera is not initialized during image capture I tried different cameras, but there is no result, even a window with a black screen does not show.
Below information about the video:
  Video I/O:
    DC1394:                      YES (ver 2.2.5)
    FFMPEG:                      YES
      avcodec:                   YES (ver 57.107.100)
      avformat:                  YES (ver 57.83.100)
      avutil:                    YES (ver 55.78.100)
      swscale:                   YES (ver 4.8.100)
      avresample:                YES (ver 3.7.0)
    GStreamer:                   NO
    gPhoto2:                     YES
 program text:
 #include <opencv2/opencv.hpp>
#include <iostream>

int main( int argc, char** argv )
{

      cv::namedWindow( "Example10", cv::WINDOW_AUTOSIZE );
      cv::VideoCapture cap;
      if (argc == 1)
         cap.open(0);

      else
         cap.open( argv[1] );

      if (!cap.isOpened())
      { 
           std::cerr << "Error." << std::endl;
           return -1;
      } 

      cv::Mat frame;

      for (;;)
      {

            cap >> frame;
            if (frame.empty()) break;
            cv::imshow( "Example10", frame );
            if (cv::waitKey(33) == 27) break;
       }

     return 0;
    }
 P.S (OpenCV - 3.4.1, Linux ubuntu 18.04)