/usr/lib/x86_64-linux-gnu/libgstmpegts-1.0.so is in libgstreamer-plugins-bad1.0-dev 1.2.3-1ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libgstmpegts-1.0.so.0.203.0