/usr/lib/libzrtpcpp.so is in libzrtpcpp-dev 1.4.6-1.1build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libzrtpcpp-1.4.so.0.0.6
/usr/lib/libzrtpcpp-1.4.so.0.0.6