/usr/lib/x86_64-linux-gnu/sane/libsane-qcam.so is in libsane-dev 1.0.22-7.4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/sane/libsane-qcam.so.1.0.22
/usr/lib/x86_64-linux-gnu/sane/libsane-qcam.so.1.0.22