/usr/lib/x86_64-linux-gnu/libswscale.so is in libswscale-dev 4:0.8.1-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libswscale.so.2.1.0
/usr/lib/x86_64-linux-gnu/libswscale.so.2.1.0