[M4IF Technotes] MP4 and QT Compatibility

[Ben Waggoner]

Chandra,
    Alas, no.  You can losslessly transcode the video and audio tracks of a
file, but interactivity and other object based stuff is very different in
QuickTime compared to MPEG-4.  MPEG-4 uses the VRML-derived BIFS, while
QuickTime uses something called Wired Sprites.
Ben Waggoner <http://www.benwaggoner.com>
Compressed Video Consulting, Training, and Encoding
My Book:            http://www.benwaggoner.com/books.htm
Compression Books:  http://www.benwaggoner.com/bookshelf.htm
on 12/6/02 1:31, Chandra Sekhar Reddy G at gchandra   tataelxsi.co.in wrote:
> We all know that
> MP4-File-Format is derived (based on or taken as starting point) from
> QuickTime-File-Format.
> 
> Now, MP4 handles Scene-Description and Object/ES Descriptors (IOD/OD ...)
> also.
> How there are handled in QuickTime?
> 
> Say, if we were to convert MP4 to/from QuickTime,
> is it always completely/acurately possible without loosing any information?