Hi i have a question today: I have 2 cameras and want to use the second to capture video.I use the same code program and the same usb cable which has been use for the first one.But i can capture the video and when compile the program i got this error:

[ INFO:0] global C:\build\master_winpack-build-win64-vc14\opencv\modules\videoio\src\backend_plugin.cpp (340) cv::impl::getPluginCandidates Found 2 plugin(s) for GSTREAMER

**[ INFO:0] global C:\build\master_winpack-build-win64-vc14\opencv\modules\videoio\src\backend_plugin.cpp (172) cv::impl::DynamicLib::libraryLoad load C:\opencv\build\x64\vc14\bin\opencv_videoio_gstreamer411_64.dll => FAILED

[ INFO:0] global C:\build\master_winpack-build-win64-vc14\opencv\modules\videoio\src\backend_plugin.cpp (172) cv::impl::DynamicLib::libraryLoad load opencv_videoio_gstreamer411_64.dll => FAILED**

And the code program is as below:

include "opencv2/opencv.hpp"

using namespace cv; int main(int, char**) { VideoCapture cap(1);

if (!cap.isOpened())
    return -1;
while (1)
{
    Mat frame;
    cap.read(frame);
    imshow("video", frame);

    if (waitKey(30) == 's')
    {
        break;
    }
}
return 0;

} I have install gstreamer so i can do this with the first camera but i dont know what is that problem about? Can anyone tell me a sulution for this? Thank you.

Hi i have a question today: I have 2 cameras and want to use the second to capture video.I use the same code program and the same usb cable which has been use for the first one.But i can capture the video and when compile the program i got this error:

[ INFO:0] global C:\build\master_winpack-build-win64-vc14\opencv\modules\videoio\src\backend_plugin.cpp (340) cv::impl::getPluginCandidates Found 2 plugin(s) for GSTREAMER

**[ INFO:0] global C:\build\master_winpack-build-win64-vc14\opencv\modules\videoio\src\backend_plugin.cpp (172) cv::impl::DynamicLib::libraryLoad load C:\opencv\build\x64\vc14\bin\opencv_videoio_gstreamer411_64.dll => FAILED

[ INFO:0] global C:\build\master_winpack-build-win64-vc14\opencv\modules\videoio\src\backend_plugin.cpp (172) cv::impl::DynamicLib::libraryLoad load opencv_videoio_gstreamer411_64.dll => FAILED**

And the code program is as below:

#include "opencv2/opencv.hpp"
using namespace cv;
int main(int, char**)
{
VideoCapture cap(1);
 
cap(1);
if (!cap.isOpened())
 return -1;
 while (1)
 {
  Mat frame;
 cap.read(frame);
  imshow("video", frame);
  if (waitKey(30) == 's')
 {
 break;
 }
 }
 return 0;
}
 
}
I have install gstreamer so i can do this with the first camera but i dont know what is that problem about?
Can anyone tell me a sulution for this?
Thank you.