EVO file (Enhanced VOB) is a container format contained in HD DVD video media. It contains the actual video, audio, subtitle and menu contents in stream form. It is an extension to VOB, which is an extension to MPEG-2 Program stream. The extensions are in the form of private stream data and their interpretation.
EVO files can contain video encoded in H.264/MPEG-4 AVC, VC-1, or MPEG-2 and audio encoded in AC-3, E-AC-3, Dolby TrueHD, DTS, DTS-HD, PCM, and MPEG-2.
There are currently only a few consumer software solutions that can play EVO files - PowerDVD, WinDVD for Windows, FFmpeg for Linux (unprotected EVO only), and the current (as of March 2008) DVD Player in Mac OS X 10.5.2.
