File list of package libavformat-dev in bookworm of architecture armhf
/usr/include/arm-linux-gnueabihf/libavformat/avformat.h
/usr/include/arm-linux-gnueabihf/libavformat/avio.h
/usr/include/arm-linux-gnueabihf/libavformat/version.h
/usr/include/arm-linux-gnueabihf/libavformat/version_major.h
/usr/lib/arm-linux-gnueabihf/libavformat.a
/usr/lib/arm-linux-gnueabihf/libavformat.so
/usr/lib/arm-linux-gnueabihf/pkgconfig/libavformat.pc
/usr/share/doc/libavformat-dev/changelog.Debian.gz
/usr/share/doc/libavformat-dev/changelog.gz
/usr/share/doc/libavformat-dev/copyright