-enableforcedsubs isn't listed in the mplayer man page and doesn't seem to be a valid option. Are you using a custom mplayer?
mplayer dvd:// -enableforcedsubs Unknown option on the command line: -enableforcedsubs Error parsing option on the command line: -enableforcedsubs MPlayer SVN-r33451-4.6.0 (C) 2000-2011 MPlayer Team -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/660688 Title: Forced subtitles option doesn't work -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs