Build OpenCV and Python Bindings in Mac(QT, Gstreamer Support)

build_opencv_in_mac.md

Build OpenCV in Mac with QT, Gstreamer Support

Install dependencies

brew install cmake #
brew install qt5 #optional
brew install gstreamer gst-plugins-base gst-plugins-good gst-plugins-bad gst-plugins-ugly gst-libav #optional
pip3 install numpy

Download OpenCV source code

git clone https://github.com/opencv/opencv.git
cd opencv
git checkout master
cd ..

git clone https://github.com/opencv/opencv_contrib.git
cd opencv_contrib
git checkout master
cd ..

Configure with require flags

mkdir build_opencv
cd build_opencv

QT5PATH=/Users/siyao/Qt/5.13.1/clang_64/ #optional
cmake -D CMAKE_BUILD_TYPE=RELEASE \
    -D CMAKE_INSTALL_PREFIX=/usr/local \
    -D OPENCV_EXTRA_MODULES_PATH=../opencv_contrib/modules \
    -D INSTALL_PYTHON_EXAMPLES=ON \
    -D INSTALL_C_EXAMPLES=OFF \
    -D BUILD_opencv_python2=OFF \
    -D BUILD_opencv_python3=ONPf \
    -D OPENCV_ENABLE_NONFREE=ON \
    -D PYTHON3_EXECUTABLE=$(which python3) \
    -D PYTHON3_INCLUDE_DIR=$(python3 -c "from distutils.sysconfig import get_python_inc; print(get_python_inc())") \
    -D PYTHON3_PACKAGES_PATH=$(python3 -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())") \
    -D WITH_GSTREAMER=ON \ #optional
    -D WITH_OPENGL=ON \ #optional
    -D CMAKE_PREFIX_PATH=$QT5PATH \ #optional
    -D CMAKE_MODULE_PATH="$QT5PATH"/lib/cmake \ #optional
    -D BUILD_EXAMPLES=ON ../opencv #downloaded opencv source folder

Build and Install

make -j$(sysctl -n hw.physicalcpu)
make install

Test

python3 -c "import cv2; print(cv2.__version__)"

references

• Compiling OpenCV with GStreamer Support
• Install OpenCV 4 on Mac OS