Hi.
I followed the Build with opencv_contrib on this link: OpenCV: Installation in Linux
Now, in my ~/opencv/opencv-4.x/include/opencv2, all I have is opencv.hpp. Because of this, I can’t use anything like cv::VideoCapture();
I am using Ubuntu 21.10
that looks like the src folder.
properly installed headers should be in /usr/local/include/opencv4
did you run make install as final step ?
Yes I did and /usr/local/include/opencv4 doesn’t exist.
did you set CMAKE_INSTALL_PREFIX to something special ?
(the last lines of your cmake output (if you still have it) should tell, where it will put things)
Yes. I followed everything step by step.
maybe run make install again, and show output ?
-- Install configuration: "Release"
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-- Up-to-date: /usr/local/share/licenses/opencv4/opencl-headers-LICENSE.txt
-- Up-to-date: /usr/local/share/licenses/opencv4/ade-LICENSE
-- Up-to-date: /usr/local/include/opencv4/opencv2/cvconfig.h
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-- Up-to-date: /usr/local/lib/cmake/opencv4/OpenCVModules.cmake
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-- Up-to-date: /usr/local/include/opencv4/opencv2/dnn/utils/inference_engine.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/dnn/version.hpp
-- Up-to-date: /usr/local/lib/libopencv_features2d.so.4.6.0
-- Up-to-date: /usr/local/lib/libopencv_features2d.so.406
-- Up-to-date: /usr/local/lib/libopencv_features2d.so
-- Up-to-date: /usr/local/include/opencv4/opencv2/features2d.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/features2d/features2d.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/features2d/hal/interface.h
-- Up-to-date: /usr/local/lib/libopencv_imgcodecs.so.4.6.0
-- Up-to-date: /usr/local/lib/libopencv_imgcodecs.so.406
-- Up-to-date: /usr/local/lib/libopencv_imgcodecs.so
-- Up-to-date: /usr/local/include/opencv4/opencv2/imgcodecs.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/imgcodecs/imgcodecs.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/imgcodecs/imgcodecs_c.h
-- Up-to-date: /usr/local/include/opencv4/opencv2/imgcodecs/ios.h
-- Up-to-date: /usr/local/include/opencv4/opencv2/imgcodecs/legacy/constants_c.h
-- Up-to-date: /usr/local/include/opencv4/opencv2/imgcodecs/macosx.h
-- Up-to-date: /usr/local/lib/libopencv_videoio.so.4.6.0
-- Up-to-date: /usr/local/lib/libopencv_videoio.so.406
-- Up-to-date: /usr/local/lib/libopencv_videoio.so
-- Up-to-date: /usr/local/include/opencv4/opencv2/videoio.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/videoio/cap_ios.h
-- Up-to-date: /usr/local/include/opencv4/opencv2/videoio/legacy/constants_c.h
-- Up-to-date: /usr/local/include/opencv4/opencv2/videoio/registry.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/videoio/videoio.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/videoio/videoio_c.h
-- Up-to-date: /usr/local/lib/libopencv_calib3d.so.4.6.0
-- Up-to-date: /usr/local/lib/libopencv_calib3d.so.406
-- Up-to-date: /usr/local/lib/libopencv_calib3d.so
-- Up-to-date: /usr/local/include/opencv4/opencv2/calib3d.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/calib3d/calib3d.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/calib3d/calib3d_c.h
-- Up-to-date: /usr/local/lib/libopencv_highgui.so.4.6.0
-- Up-to-date: /usr/local/lib/libopencv_highgui.so.406
-- Up-to-date: /usr/local/lib/libopencv_highgui.so
-- Up-to-date: /usr/local/include/opencv4/opencv2/highgui.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/highgui/highgui.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/highgui/highgui_c.h
-- Up-to-date: /usr/local/lib/libopencv_objdetect.so.4.6.0
-- Up-to-date: /usr/local/lib/libopencv_objdetect.so.406
-- Up-to-date: /usr/local/lib/libopencv_objdetect.so
-- Up-to-date: /usr/local/include/opencv4/opencv2/objdetect.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/objdetect/detection_based_tracker.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/objdetect/face.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/objdetect/objdetect.hpp
-- Up-to-date: /usr/local/lib/libopencv_stitching.so.4.6.0
-- Up-to-date: /usr/local/lib/libopencv_stitching.so.406
-- Up-to-date: /usr/local/lib/libopencv_stitching.so
-- Up-to-date: /usr/local/include/opencv4/opencv2/stitching.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/stitching/detail/autocalib.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/stitching/detail/blenders.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/stitching/detail/camera.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/stitching/detail/exposure_compensate.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/stitching/detail/matchers.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/stitching/detail/motion_estimators.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/stitching/detail/seam_finders.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/stitching/detail/timelapsers.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/stitching/detail/util.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/stitching/detail/util_inl.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/stitching/detail/warpers.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/stitching/detail/warpers_inl.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/stitching/warpers.hpp
-- Up-to-date: /usr/local/lib/libopencv_video.so.4.6.0
-- Up-to-date: /usr/local/lib/libopencv_video.so.406
-- Up-to-date: /usr/local/lib/libopencv_video.so
-- Up-to-date: /usr/local/include/opencv4/opencv2/video.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/video/background_segm.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/video/detail/tracking.detail.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/video/legacy/constants_c.h
-- Up-to-date: /usr/local/include/opencv4/opencv2/video/tracking.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/video/video.hpp
-- Up-to-date: /usr/local/lib/libopencv_gapi.so.4.6.0
-- Up-to-date: /usr/local/lib/libopencv_gapi.so.406
-- Up-to-date: /usr/local/lib/libopencv_gapi.so
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/core.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/cpu/core.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/cpu/gcpukernel.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/cpu/imgproc.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/cpu/stereo.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/cpu/video.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/fluid/core.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/fluid/gfluidbuffer.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/fluid/gfluidkernel.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/fluid/imgproc.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/garg.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/garray.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/gasync_context.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/gcall.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/gcommon.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/gcompiled.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/gcompiled_async.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/gcompoundkernel.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/gcomputation.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/gcomputation_async.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/gframe.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/gkernel.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/gmat.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/gmetaarg.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/gopaque.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/gproto.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/gpu/core.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/gpu/ggpukernel.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/gpu/imgproc.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/gscalar.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/gstreaming.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/gtransform.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/gtype_traits.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/gtyped.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/imgproc.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/infer.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/infer/bindings_ie.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/infer/ie.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/infer/onnx.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/infer/parsers.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/media.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/oak/infer.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/oak/oak.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/ocl/core.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/ocl/goclkernel.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/ocl/imgproc.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/opencv_includes.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/operators.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/own/assert.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/own/convert.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/own/cvdefs.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/own/exports.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/own/mat.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/own/saturate.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/own/scalar.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/own/types.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/plaidml/core.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/plaidml/gplaidmlkernel.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/plaidml/plaidml.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/python/python.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/render.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/render/render.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/render/render_types.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/rmat.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/s11n.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/s11n/base.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/stereo.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/streaming/cap.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/streaming/desync.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/streaming/format.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/streaming/gstreamer/gstreamerpipeline.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/streaming/gstreamer/gstreamersource.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/streaming/meta.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/streaming/onevpl/accel_types.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/streaming/onevpl/cfg_params.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/streaming/onevpl/data_provider_interface.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/streaming/onevpl/device_selector_interface.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/streaming/onevpl/source.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/streaming/source.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/streaming/sync.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/util/any.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/util/compiler_hints.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/util/copy_through_move.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/util/optional.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/util/throw.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/util/type_traits.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/util/util.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/util/variant.hpp
-- Up-to-date: /usr/local/include/opencv4/opencv2/gapi/video.hpp
-- Up-to-date: /usr/local/lib/python3.9/site-packages/cv2/__init__.py
-- Up-to-date: /usr/local/lib/python3.9/site-packages/cv2/load_config_py2.py
-- Up-to-date: /usr/local/lib/python3.9/site-packages/cv2/load_config_py3.py
-- Up-to-date: /usr/local/lib/python3.9/site-packages/cv2/config.py
-- Up-to-date: /usr/local/lib/python3.9/site-packages/cv2/misc/__init__.py
-- Up-to-date: /usr/local/lib/python3.9/site-packages/cv2/misc/version.py
-- Up-to-date: /usr/local/lib/python3.9/site-packages/cv2/mat_wrapper/__init__.py
-- Up-to-date: /usr/local/lib/python3.9/site-packages/cv2/utils/__init__.py
-- Up-to-date: /usr/local/lib/python3.9/site-packages/cv2/gapi/__init__.py
-- Up-to-date: /usr/local/lib/python3.9/site-packages/cv2/python-3.9/cv2.cpython-39-x86_64-linux-gnu.so
-- Up-to-date: /usr/local/lib/python3.9/site-packages/cv2/config-3.9.py
-- Up-to-date: /usr/local/share/opencv4/haarcascades/haarcascade_eye.xml
-- Up-to-date: /usr/local/share/opencv4/haarcascades/haarcascade_eye_tree_eyeglasses.xml
-- Up-to-date: /usr/local/share/opencv4/haarcascades/haarcascade_frontalcatface.xml
-- Up-to-date: /usr/local/share/opencv4/haarcascades/haarcascade_frontalcatface_extended.xml
-- Up-to-date: /usr/local/share/opencv4/haarcascades/haarcascade_frontalface_alt.xml
-- Up-to-date: /usr/local/share/opencv4/haarcascades/haarcascade_frontalface_alt2.xml
-- Up-to-date: /usr/local/share/opencv4/haarcascades/haarcascade_frontalface_alt_tree.xml
-- Up-to-date: /usr/local/share/opencv4/haarcascades/haarcascade_frontalface_default.xml
-- Up-to-date: /usr/local/share/opencv4/haarcascades/haarcascade_fullbody.xml
-- Up-to-date: /usr/local/share/opencv4/haarcascades/haarcascade_lefteye_2splits.xml
-- Up-to-date: /usr/local/share/opencv4/haarcascades/haarcascade_licence_plate_rus_16stages.xml
-- Up-to-date: /usr/local/share/opencv4/haarcascades/haarcascade_lowerbody.xml
-- Up-to-date: /usr/local/share/opencv4/haarcascades/haarcascade_profileface.xml
-- Up-to-date: /usr/local/share/opencv4/haarcascades/haarcascade_righteye_2splits.xml
-- Up-to-date: /usr/local/share/opencv4/haarcascades/haarcascade_russian_plate_number.xml
-- Up-to-date: /usr/local/share/opencv4/haarcascades/haarcascade_smile.xml
-- Up-to-date: /usr/local/share/opencv4/haarcascades/haarcascade_upperbody.xml
-- Up-to-date: /usr/local/share/opencv4/lbpcascades/lbpcascade_frontalcatface.xml
-- Up-to-date: /usr/local/share/opencv4/lbpcascades/lbpcascade_frontalface.xml
-- Up-to-date: /usr/local/share/opencv4/lbpcascades/lbpcascade_frontalface_improved.xml
-- Up-to-date: /usr/local/share/opencv4/lbpcascades/lbpcascade_profileface.xml
-- Up-to-date: /usr/local/share/opencv4/lbpcascades/lbpcascade_silverware.xml
-- Up-to-date: /usr/local/bin/opencv_annotation
-- Up-to-date: /usr/local/bin/opencv_visualisation
-- Up-to-date: /usr/local/bin/opencv_interactive-calibration
-- Up-to-date: /usr/local/bin/opencv_version
-- Up-to-date: /usr/local/bin/opencv_model_diagnostics
that looks all correct, as expected.
any current problems with it, now ?
how do you try to build your “test file” ?
Test file? Could you explain that?
your own program, using e.g. VideoCapture
Oh the #include imports still have red underlines so the error is persisting.
that seems to be some kind of ide.
did you remember to adjust the include path somewhere there to
/usr/local/include/opencv4 ??
try on a plain console, using
g++ my.cpp -I/usr/local/include/opencv4 -lopencv_core [more opencv libs] -o myprogWhen putting the full path, the #include imports no longer have red underlines but my initial problem, where the variable cap in FPS = cap.get() throws a Use of undeclared identifier 'cap'.
When I do g++ main.cpp, I get this error:
In file included from main.cpp:3:
/usr/local/include/opencv4/opencv2/opencv.hpp:48:10: fatal error: opencv2/opencv_modules.hpp: No such file or directory
48 | #include "opencv2/opencv_modules.hpp"
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
This is despite that my code now looks like this:
#include <iostream>
#include "src/VideoProcessing.h"
#include </usr/local/include/opencv4/opencv2/opencv.hpp>
#include </usr/local/include/opencv4/opencv2/videoio.hpp>
#include </usr/local/include/opencv4/opencv2/core.hpp>
#include </usr/local/include/opencv4/opencv2/highgui.hpp>
int main() {
int FPS;//Declaring an integer variable to store the number of total frames//
cv::VideoCapture cap("video1.mp4");//Declaring an object to capture stream of frames from default camera//
FPS = cap.get(CAP_PROP_FPS);//Getting the total number of frames//
std::cout << "Total Number of frames are:" << FPS << std::endl;//Showing the number in console window//
system("pause");//Pausing the system to see the result
cap.release();//Releasing the buffer memory//
return 0;
}
Which leads me to believe that opencv needs to be somehow standardized in my system where "opencv2/opencv_modules.hpp" wouldn’t throw an error.
And yes, I’m using CLion.
not legit (as those includes wont find dependant ones).
solve the include path problem in your ide instead
Yea but I’m running main.cpp in terminal, not IDE. Also, how do I fix it in the IDE if I don’t know the source?
This is my CMake file:
cmake_minimum_required(VERSION 3.22)
project(mediafile_device_crossverification)
set(CMAKE_CXX_STANDARD 11)
set(OpenCV FOUND 1)
find_package(OpenCV REQUIRED)
add_executable(mediafile_device_crossverification main.cpp src/VideoProcessing.cpp src/VideoProcessing.h)
I’ve added
set(OpenCV FOUND 1)
find_package(OpenCV REQUIRED)
later on but it didn’t work.
-I/usr/local/include/opencv4
/usr/local/include/opencv4follow up: