The standard install of
opencv appears to be broken on Fedora 24 - because (when loading an image) it requires
libavcodec.so.53 whereas up-to-date
ffmpeg-devel has an apparently useless
So, building from source appears to be the way to go (particularly since Fedora 24 has
opencv ~2.4.12, rather than
Building OpenCV from source
This makes use of these instructions.
Clone OpenCV from GitHub
git clone https://github.com/Itseez/opencv.git cd opencv/ mkdir build
Install required packages
dnf install tbb-devel eigen3-devel # If you need video (for png, jpeg only this isn't required) #dnf install ffmpeg-devel
One thing that I didn't realise before, is that
cmake options are cumulative across commandline invocations :
cd ../opencv/build # ensure we're in the right place cmake -D WITH_TBB=ON -D WITH_EIGEN=ON -D WITH_JAVA=OFF .. cmake -D BUILD_DOCS=OFF -D BUILD_TESTS=OFF -D BUILD_PERF_TESTS=OFF -D BUILD_EXAMPLES=OFF .. cmake -D WITH_OPENCL=OFF -D WITH_CUDA=OFF -D BUILD_opencv_gpu=OFF -D BUILD_opencv_gpuarithm=OFF -D BUILD_opencv_gpubgsegm=OFF -D BUILD_opencv_gpucodec=OFF -D BUILD_opencv_gpufeatures2d=OFF -D BUILD_opencv_gpufilters=OFF -D BUILD_opencv_gpuimgproc=OFF -D BUILD_opencv_gpulegacy=OFF -D BUILD_opencv_gpuoptflow=OFF -D BUILD_opencv_gpustereo=OFF -D BUILD_opencv_gpuwarping=OFF .. cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr ..
cd ../build # ensure we're in the right place make sudo make install
Test that Python integration works
python Python 2.7.11 (default, Jun 21 2016, 09:15:12) [GCC 6.1.1 20160510 (Red Hat 6.1.1-2)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import cv2 >>> cv2.__version__ '3.1.0-dev'