At 09:09 AM 12/22/2008, Lee Menningen wrote:
>It seems to me an index file would be relative to the start of the file so
>that it could be valid (designed to be portable) between systems, all that
>is needed is a locator reference point the user specifies in a preference
>file. Maybe that is simply an oversight. Contrariwise: first, it is possible
>it includes some other info that might be system dependent, or second, maybe
>that doesn't explain the index file in the first place.

That could be an index file using the classic programming definition 
of indexing, but I think we're looking at something completely 
different going on here: turning groups of pictures in MPEG-encoded 
video into a set of independent frames so the video can be edited 
without any one frame being dependent on others. To do that, Premiere 
has to turn all the P and/or B frames following the I frame in each 
GOP into I frames. (Check Wikipedia for "group of pictures" if none 
of this makes sense.)

I think that's why it takes so long to index video, and why I suspect 
that whatever index file Premiere generates must be very large.

Then again, I don't really know. That's why I hoped there might be 
someone from Adobe on the list who could tell us what's really going 
on during the endless indexing.

Mike Boom 


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