/usr/ is in libavfilter-dev 7:3.4.2-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/x86_64-linux-gnu/
/usr/include/x86_64-linux-gnu/libavfilter/
/usr/include/x86_64-linux-gnu/libavfilter/avfilter.h
/usr/include/x86_64-linux-gnu/libavfilter/avfiltergraph.h
/usr/include/x86_64-linux-gnu/libavfilter/buffersink.h
/usr/include/x86_64-linux-gnu/libavfilter/buffersrc.h
/usr/include/x86_64-linux-gnu/libavfilter/version.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/libavfilter.a
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/libavfilter.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/libavfilter-dev/
/usr/share/doc/libavfilter-dev/copyright
/usr/lib/x86_64-linux-gnu/libavfilter.so
/usr/share/doc/libavfilter-dev/changelog.Debian.gz