/usr/ is in libavfilter-dev 7:2.8.6-1ubuntu2.
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/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/libavfilter-ffmpeg.pc
/usr/lib/x86_64-linux-gnu/libavfilter-ffmpeg.a
/usr/include/
/usr/include/x86_64-linux-gnu/
/usr/include/x86_64-linux-gnu/libavfilter/
/usr/include/x86_64-linux-gnu/libavfilter/buffersrc.h
/usr/include/x86_64-linux-gnu/libavfilter/avfilter.h
/usr/include/x86_64-linux-gnu/libavfilter/asrc_abuffer.h
/usr/include/x86_64-linux-gnu/libavfilter/avfiltergraph.h
/usr/include/x86_64-linux-gnu/libavfilter/version.h
/usr/include/x86_64-linux-gnu/libavfilter/avcodec.h
/usr/include/x86_64-linux-gnu/libavfilter/buffersink.h
/usr/share/
/usr/share/doc/
/usr/share/doc/libavfilter-dev/
/usr/share/doc/libavfilter-dev/copyright
/usr/lib/x86_64-linux-gnu/pkgconfig/libavfilter.pc
/usr/lib/x86_64-linux-gnu/libavfilter.a
/usr/lib/x86_64-linux-gnu/libavfilter.so
/usr/lib/x86_64-linux-gnu/libavfilter-ffmpeg.so
/usr/share/doc/libavfilter-dev/changelog.Debian.gz