undefined reference to `cv::VideoCapture::VideoCapture()'

[Tord-Zhang]

when I run "make all",there are errors:
build_release/lib/libcaffe.so: undefined reference to cv::VideoCapture::set(int, double)'
.build_release/lib/libcaffe.so: undefined reference to cv::VideoCapture::open(cv::String const&)' .build_release/lib/libcaffe.so: undefined reference to cv::VideoCapture::release()'
.build_release/lib/libcaffe.so: undefined reference to cv::VideoCapture::~VideoCapture()' .build_release/lib/libcaffe.so: undefined reference to cv::VideoCapture::isOpened() const'
.build_release/lib/libcaffe.so: undefined reference to cv::VideoCapture::get(int) const' .build_release/lib/libcaffe.so: undefined reference to cv::VideoCapture::read(cv::_OutputArray const&)'
.build_release/lib/libcaffe.so: undefined reference to cv::VideoCapture::VideoCapture()' collect2: error: ld returned 1 exit status make: *** [.build_release/tools/compute_image_mean.bin] Error 1 make: *** Waiting for unfinished jobs.... .build_release/lib/libcaffe.so: undefined reference to cv::VideoCapture::set(int, double)'
.build_release/lib/libcaffe.so: undefined reference to cv::VideoCapture::open(cv::String const&)' .build_release/lib/libcaffe.so: undefined reference to cv::VideoCapture::release()'
.build_release/lib/libcaffe.so: undefined reference to cv::VideoCapture::~VideoCapture()' .build_release/lib/libcaffe.so: undefined reference to cv::VideoCapture::isOpened() const'
.build_release/lib/libcaffe.so: undefined reference to cv::VideoCapture::get(int) const' .build_release/lib/libcaffe.so: undefined reference to cv::VideoCapture::read(cv::_OutputArray const&)'
`
How can I fix this?

[dutran]

do you have opencv and ffmpeg installed on your machine?

[Tord-Zhang]

yes,I have already install opencv.and I can successfully compile v1.0.

[dutran]

It is weird, sounds like a linking problem. Some LD_LIBRARY_PATH may solve it

[dutran]

check this #259

[dutran]

@mangdian try again, just modify Makefile

[heixi]

How to solve this problem？ i using GTX1080 + cuda8.0 + cudnn5.0 @dutran

[sunnyxiaohu]

modify :　LIBRARIES += opencv_core opencv_highgui opencv_imgproc opencv_video
to: LIBRARIES += opencv_core opencv_highgui opencv_imgproc opencv_videoio

[dutran]

try to pull and compile again should solve the issue.

[jzyztzn]

@sunnyxiaohu thanks,it works for me,(and my opencv version is 3.2).

[IanMin1022]

@sunnyxiaohu how can I put the linking in my bash?

[codestamp]

thanks @sunnyxiaohu adding opencv_videoio did the job.

[prasuchit]

Hi,

Could you tell me the location of this makefile where the path change has to be made? I tried searching through the entire opencv folder and couldn't find the right file.

[ibrahimqazi]

It is weird, sounds like a linking problem. Some LD_LIBRARY_PATH may solve it

I have also the same problem, I am using ROS and compiling it using Catkin, I have CMakeLists.txt file for my package. Can you please explain what is mean by LD_LIBRARY_PATH, how can I solve it in my case ? thanks

[YHAY]

It is weird, sounds like a linking problem. Some LD_LIBRARY_PATH may solve it

I have also the same problem, I am using ROS and compiling it using Catkin, I have CMakeLists.txt file for my package. Can you please explain what is mean by LD_LIBRARY_PATH, how can I solve it in my case ? thanks

i have same problem:(

[BluebirdStory]

或许这就是大佬吧 @sunnyxiaohu

[showgood163]

@sunnyxiaohu
Thank you.

[TangAL0203]

@sunnyxiaohu 大佬大佬！

[TangAL0203]

modify Makefile as @sunnyxiaohu said!

[sljlp]

modify :　LIBRARIES += opencv_core opencv_highgui opencv_imgproc opencv_video
to: LIBRARIES += opencv_core o