opencv version：4.4.0

install FFmpeg: git clone https://github.com/FFmpeg/FFmpeg.git cd FFmpeg ./configure --enable-shared make -j8 make install

install opencv: export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig mkdir build cd build cmake .. -DBUILD_opencv_world=ON make -j8 make install

install cmake: sudo apt-get install cmake

part1: test dnn module: darknet yolov3 usage: make build cd build cmake .. make ./dnn/dnnDemo cfg weights img