/usr/lib/liblavjpeg-1.9.so.0 is in libmjpegtools-1.9 1:1.9.0-0.5ubuntu7.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/liblavjpeg-1.9.so.0.0.0
/usr/lib/liblavjpeg-1.9.so.0.0.0