QT5.8 linux opencv3

[gfxx]

QT5.8, ubuntu 16, kernel 4.4, in my .pro file....

LIBS += -L/usr/local/lib \
lopencv_shape \
lopencv_stitching \
lopencv_superres \
lopencv_videostab \
lopencv_photo \
lopencv_bgsegm \
lopencv_bioinspired \
lopencv_ccalib \
lopencv_cvv \
lopencv_dnn \
lopencv_dpm \
lopencv_fuzzy \
lopencv_line_descriptor \
lopencv_plot \
lopencv_reg \
lopencv_saliency \
lopencv_stereo \
lopencv_structured_light \
lopencv_rgbd \
lopencv_calib3d \
lopencv_surface_matching \
lopencv_tracking \
lopencv_datasets \
lopencv_text \
lopencv_features2d \
lopencv_face \
lopencv_objdetect \
lopencv_highgui \
lopencv_videoio \
lopencv_imgcodecs \
lopencv_video \
lopencv_ml \
lopencv_imgproc \
lopencv_flann \
lopencv_core \
lopencv_hal

debug result: ```
:-1: error: error: libopencv_shape: File o directory not exist

and these for all .so file .... but the file exist on that folder .... some ideas?? ( same app in QT5.6 work great)...

regards
Giorgio

[SGaist]

Hi,

From what you posted, you forget to put - before all your lopencv_xxx statements i.e. -lopencv_shape.

Note that I'm used to OpenCV having library names containing also the version number so take that into account also.

[gfxx]

4 mounth ago I've upgrade opencv from 2.x to 3.1 .... on other pc QT5.6 UBUNTU 14.04 SAME KERNEL of these pc 16.04 .... so I modify mY file .pro in these way:

CONFIG += link_pkgconfig
PKGCONFIG += opencv
INCLUDEPATH += /usr/local/include/opencv2
INCLUDEPATH += /usr/local/include/
INCLUDEPATH += /usr/local/share/OpenCV/

INCLUDEPATH += /usr/local/include/opencv

INCLUDEPATH += .
INCLUDEPATH += /usr/local/include
INCLUDEPATH += /usr/local/include/opencv
INCLUDEPATH += /usr/local/include/opencv2
INCLUDEPATH += /usr/local/include/opencv2/core
INCLUDEPATH += /usr/local/include/opencv2/highgui
INCLUDEPATH += /usr/local/include/opencv2/imgproc
INCLUDEPATH += /usr/local/include/opencv2/flann
INCLUDEPATH += /usr/local/include/opencv2/photo
INCLUDEPATH += /usr/local/include/opencv2/video
INCLUDEPATH += /usr/local/include/opencv2/videoio
INCLUDEPATH += /usr/local/include/opencv2/features2d
INCLUDEPATH += /usr/local/include/opencv2/objdetect
INCLUDEPATH += /usr/local/include/opencv2/calib3d
INCLUDEPATH += /usr/local/include/opencv2/ml
INCLUDEPATH += /usr/local/include/opencv2/contrib



LIBS += -lX11 -pthread -lglut -lGL -lGLU
LIBS += -lmodbus
LIBS += -L/usr/lib/x86_64-linux-gnu/libv4l/libv4l2convert.so
LIBS += -L/usr/lib/x86_64-linux-gnu/libv4l




#LIBS += -L/usr/local/lib \
#-libopencv_shape \
#-libopencv_stitching \
#-libopencv_superres \
#-libopencv_videostab \
#-libopencv_photo \
#-libopencv_bgsegm \
#-libopencv_bioinspired \
#-libopencv_ccalib \
#-libopencv_cvv \
#-libopencv_dnn \
#-libopencv_dpm \
#-libopencv_fuzzy \
#-libopencv_line_descriptor \
#-libopencv_plot \
#-libopencv_reg \
#-libopencv_saliency \
#-libopencv_stereo \
#-libopencv_structured_light \
#-libopencv_rgbd \
#-libopencv_calib3d \
#-libopencv_surface_matching \
#-libopencv_tracking \
#-libopencv_datasets \
#-libopencv_text \
#-libopencv_features2d \
#-libopencv_face \
#-libopencv_objdetect \
#-libopencv_highgui \
#-libopencv_videoio \
#-libopencv_imgcodecs \
#-libopencv_video \
#-libopencv_ml \
#-libopencv_imgproc \
#-libopencv_flann \
#-libopencv_core \
#-libopencv_hal

all work fine and the app (still in test ...) work like a charm ..... I' interested to modbus on qt5.8 so I try to compile my app working in qt5.6 into qt5.8 .... and I have these error on opencv library ... so I try to leave the old comment (#) I tried to use the old way to indicate opencv libraries in .pro files ..... unfortunately it does not work even with your indication, which I had tried earlier .... it works to use the new path of the xxxx / Opencv2xxx .... I do not know what to do.

using these:

LIBS += -L/usr/local/lib \
-libopencv_shape \
-libopencv_stitching \
-libopencv_superres \
/** etc etc */

I have these error: impossible to find: -libopencv_xxx (for 37 time equal to library to use)

and in these way I obtain these other error:

CONFIG += link_pkgconfig
PKGCONFIG += opencv
INCLUDEPATH += /usr/local/include/opencv2
INCLUDEPATH += /usr/local/include/
INCLUDEPATH += /usr/local/share/OpenCV/

INCLUDEPATH += /usr/local/include/opencv

INCLUDEPATH += .
INCLUDEPATH += /usr/local/include
INCLUDEPATH += /usr/local/include/opencv
INCLUDEPATH += /usr/local/include/opencv2
INCLUDEPATH += /usr/local/include/opencv2/core
INCLUDEPATH += /usr/local/include/opencv2/highgui
INCLUDEPATH += /usr/local/include/opencv2/imgproc
INCLUDEPATH += /usr/local/include/opencv2/flann
INCLUDEPATH += /usr/local/include/opencv2/photo
INCLUDEPATH += /usr/local/include/opencv2/video
INCLUDEPATH += /usr/local/include/opencv2/videoio
INCLUDEPATH += /usr/local/include/opencv2/features2d
INCLUDEPATH += /usr/local/include/opencv2/objdetect
INCLUDEPATH += /usr/local/include/opencv2/calib3d
INCLUDEPATH += /usr/local/include/opencv2/ml
INCLUDEPATH += /usr/local/include/opencv2/contrib



LIBS += -lX11 -pthread -lglut -lGL -lGLU
LIBS += -lmodbus
LIBS += -L/usr/lib/x86_64-linux-gnu/libv4l/libv4l2convert.so
LIBS += -L/usr/lib/x86_64-linux-gnu/libv4l

#LIBS += -L/usr/local/lib \
#-libopencv_shape \
#-libopencv_stitching \
#-libopencv_superres \

the new error:

/usr/local/lib/libopencv_imgcodecs.so:-1: error: undefined referred to "Imf::chromaticities(Imf::Header const&)"
/*i have 73 error of these type .... but as you can see in my app not use local lib libopencv .... but only opencv2/opencv.hpp for ex.***/

in my app the incluse file is these:

#include <opencv/highgui.h>
#include <opencv2/opencv.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/core/core.hpp>
#include <opencv2/video/video.hpp>
//#include <opencv2/ocl/matrix_operations.hpp>
//#include <opencv2/ocl/ocl.hpp>
#include <opencv2/calib3d/calib3d.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/videoio.hpp>
#include <opencv2/videoio/videoio_c.h>
#include <opencv2/core/ocl.hpp>

regards
Giorgio

[gfxx]

is possible i've found the problem... for example these warning:

:-1: warning: libswscale.so.2, needed by /usr/local/lib/libopencv_videoio.so, not found (try using -rpath or -rpath-link)

but in ubuntu 16.04 kernel 4.4 libswscale.so.2 is not on surce list because to old.... the same for other libavxxxx.52/.54 exist only .dev version ....

some suggest to solve?

regards
giorgio

[SGaist]

Do you mean you updated your system without re-building OpenCV ?

[gfxx]

@SGaist ... you are in right is a std solution ... but I hope in something more smart ... because the old lib is not avaiable on ubuntu repo and is possible (if use 16.04 + 14.04 repo) some tipe of conflict ... :( ..... or go down to 14.04 again .... But this breaks me a lot of bxxxx because where to reinstall androidStudio ....

any how thanks.

regards
giorgio

[SGaist]

What do you have currently installed ? (OpenCV version, how did you install it etc.)

What exactly error do you have now ?

[gfxx]

@SGaist no I've not update my sytem without re-compile opencv.... I have only update from qt5.6 to Qt5.8 ..... all other parth of system is the same .... opencv is right compile on version 3.1... 2 week ago I,ve right test opencv on c file and example .... tomorrow I re-test example file.

regards
Giorgio

[gfxx]

..... the problem is about WITH_QT flag in cmake ..... I flak it on cmake-gui but I read that command enable support to qt4 only and make problem onto ubuntu 16.04 and major than QT5.2 .... opencv run in stand alone mode but inside qt project make these type of error .... so clean all my pc from opencv and re-install (i test opencv3.2) without WITH_QT flag .... all works like a charm.

regards
giorgio