/usr/lib/ is in libqtgstreamer-dev 0.10.2-2.1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/QtGStreamerUtils-0.10.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/QtGStreamerUi-0.10.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/QtGStreamer-0.10.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/QtGLib-2.0.pc
/usr/lib/x86_64-linux-gnu/QtGStreamer/
/usr/lib/x86_64-linux-gnu/QtGStreamer/QtGStreamerTargets.cmake
/usr/lib/x86_64-linux-gnu/QtGStreamer/QtGStreamerTargets-relwithdebinfo.cmake
/usr/lib/x86_64-linux-gnu/QtGStreamer/QtGStreamerConfig.cmake
/usr/lib/x86_64-linux-gnu/libQtGStreamerUi-0.10.so
/usr/lib/x86_64-linux-gnu/libQtGStreamer-0.10.so
/usr/lib/x86_64-linux-gnu/libQtGStreamerUtils-0.10.so
/usr/lib/x86_64-linux-gnu/libQtGLib-2.0.so