/usr/lib/x86_64-linux-gnu/pkgconfig/gstreamer-mpegts-1.0.pc is in libgstreamer-plugins-bad1.0-dev 1.14.0-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 | prefix=/usr
exec_prefix=${prefix}
libdir=${prefix}/lib/x86_64-linux-gnu
includedir=${prefix}/include/gstreamer-1.0
Name: GStreamer MPEG-TS
Description: GStreamer MPEG-TS support
Requires: gstreamer-1.0 gstreamer-base-1.0
Version: 1.14.0
Libs: -L${libdir} -lgstmpegts-1.0
Cflags: -I${includedir}
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