Working legal source code for a decoder/demuxer can be found here but it is copyrighted and without open source licence: http://sourceforge.net/tracker/index.php?func=detail&aid=1097094&group_id=53761&atid=471491 also look at http://thread.gmane.org/gmane.comp.video.ffmpeg.devel/25207/focus=25224 and http://www.maxconsole.net/?mode=news&newsid=411 for hints/tips
All multi-byte numbers of little endian.
bytes 0-11 unknown bytes 12-15 'xobX' ('Xbox' spelled backwards) bytes 16-19 unknown bytes 20-23 video width in pixels bytes 24-27 video height in pixels bytes 28-37 unknown bytes 38-39 number of audio channels bytes 40-43 audio sample rate bytes 44.. unknown
Games Using XMV
This is a list of games (usually Xbox games) know to use the XMV format.