.MPSUB File Extension
File TypeMPlayer Subtitles File
What is an MPSUB file?
Movie subtitles file created by MPlayer, a multimedia playback application; contains a dump of movie subtitles converted from another subtitle file, such as an .SSA file; used for storing subtitles in a format that can be manipulated by MPlayer.
MPSUB files can be dumped using the MPlayer dumpmpsub command-line tool.