build script for opencv using a custom ffmpeg installation

build.sh

#!/bin/bash

# Note: You need to replace the path accordingly

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/insert/path/here/ffmpeg-4.4.1-5/lib
export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/insert/path/here/ffmpeg-4.4.1-5/lib/pkgconfig
export PKG_CONFIG_LIBDIR=$PKG_CONFIG_LIBDIR:/insert/path/here/ffmpeg-4.4.1-5/lib

cmake \
    -D BUILD_EXAMPLES=ON \
    -D BUILD_TESTS=OFF \
    -D OPENCV_EXTRA_EXE_LINKER_FLAGS="-Wl,-rpath,/insert/path/here/ffmpeg-4.4.1-5/lib" \
    -D CMAKE_BUILD_TYPE=RELEASE \
    -D CMAKE_INSTALL_PREFIX=$HOME/Applications/opencv \
    /insert/path/here/opencv-python/opencv