/usr/ is in libpostproc-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/libpostproc-ffmpeg.pc
/usr/lib/x86_64-linux-gnu/libpostproc-ffmpeg.a
/usr/include/
/usr/include/x86_64-linux-gnu/
/usr/include/x86_64-linux-gnu/libpostproc/
/usr/include/x86_64-linux-gnu/libpostproc/version.h
/usr/include/x86_64-linux-gnu/libpostproc/postprocess.h
/usr/share/
/usr/share/doc/
/usr/share/doc/libpostproc-dev/
/usr/share/doc/libpostproc-dev/copyright
/usr/lib/x86_64-linux-gnu/pkgconfig/libpostproc.pc
/usr/lib/x86_64-linux-gnu/libpostproc.a
/usr/lib/x86_64-linux-gnu/libpostproc-ffmpeg.so
/usr/lib/x86_64-linux-gnu/libpostproc.so
/usr/share/doc/libpostproc-dev/changelog.Debian.gz