This seems like a nice project for a porter guru. OS/2 is the only one not listed.
OpenSource DVD and MPEG tools for Linux, BeOS, FreeBSD, MacOS X, QNX, Solaris, Windows VideoLAN is a project of students from the ?cole Centrale Paris. Its main goals are MPEG and DVD playing and broadcasting on the campus, but it also features a standalone multimedia player that can read DVDs and MPEG files. It will also eventually support streams from a satellite or from an MPEG2 compression card. VideoLAN is free software, and is released under the GNU General Public License(...)
Source: OS/2 ORG