[Mp4-tech] authoring mpeg4 content

[steven godber]

hi all.
  i was initially very excited about mpeg4 particularly authored content in XMT.
  i made some experiments in BIFStext and then encoding into mpeg4 using  the open source mp4box. these were fine as experiments go, but the  results could only be played in the osmo4 player. quicktime and  realplayer had no idea what to make of them. 
  can someone explain to me some of the more pertinent issues at large here ?
  i have been playing with vrml/x3d and would like to migrate this to  mpeg4 such as was promised in the original mpeg4 hype (3d graphics, not  the export) but find there are a number of codec/ownership issues here  which i confess i do not totally understand.
  how possible is it to actually "author once, play anywhere" and how much is it going cost 1) me and 2) the user.
  thanks for your help.
  steven godber.
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