spumux(1) on Linux
The text fb0205533cc9, as Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy) shipped it.
generates and multiplexes subtitles into an existing mpeg2 program stream
Flags it lists
-
--nodvdauthor-data -
--nomux -
-P -
-m -
-s -
-v