/usr/lib/x86_64-linux-gnu/libMLV.so is in libmlv3-dev 3.1.0-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libMLV.so.3.0.1
/usr/lib/x86_64-linux-gnu/libMLV.so.3.0.1