/usr/lib/python2.6/dist-packages/pymecavideo/label_trajectoire.py is in python-mecavideo 6.1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.6/dist-packages/pymecavideo/../../../../share/pyshared/pymecavideo/label_trajectoire.py