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overhead when using a LOT of non-overlapping tracks ?

Dear list members,

I would like to save a movie made of several clips with transitions (like iMovie does)
and I wonder if it is possible to use QT as a storage for this (I'm not talking about
export here, but storing the movie with its structure)

The way it's implemented now is :
- 1 track for each video clip (perhaps more than 1 track if parts
of this clip (beginning or end) are in a transition).
- Those tracks overlap only where there is a transition effect between
those two clips.

The problem with this approach is that the number of clips quickly increases.

It's not uncommon to have as many as 400 or 500 tracks for a single movie.

My question is : what exactly is the overhead of dealing with movies with an
awful lot of tracks like these (both memory and cpu usage) ?

Was QuickTime designed to be able to handle a lot of tracks without too many
troubles (let's say more than 100 and less than 3000) ? Are there many QT
functions (adding tracks, prerolling, etc...) that depend upon the TOTAL number
of tracks in the movie ?

I would like to avoid wirting benchmarking code if someone has a clear
answer to give me.

Thank you

Benjamin Golinvaux
www.arboretum.com
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