cmake MP4v2 examples

mixxxdj/mixxx CMakeLists.txt :4401 

find_package(MP4v2)

KDE/kid3 src/plugins/mp4v2metadata/CMakeLists.txt :4 

find_package(Mp4v2 REQUIRED)

luxonis/depthai-core cmake/depthaiDependencies.cmake :154 

find_package(mp4v2 ${_QUIET} CONFIG REQUIRED)