[Kdenlive-devel] last CVS

[Jason Wood]

On Tuesday 19 Nov 2002 6:30 pm, Rolf Dubitzky wrote:
> > I'm unsure as to how much effect throwing snapshots through pipe will
> > have - if we consider 13K per snapshot, with 2 thumbnails per clip, then
> > we would need approximately 38000 clips on the timeline to require 1 meg
> > of data transfer.
>
> Very interesting calculation, 1 meg is not that much. I think we shold go
> for the file or pipe solution (they are pretty similar from implementation
> point of view, pipe is probably much faster (unless the GUI doesn't save to
> a file afterwards). If it turns out bollocks.... we'll try something else.
> What do you think ?

Oops, interesting is the right word alright, I got it wrong.

I divided 1Meg (1,000,000) by (13*2), when it should have been by approx 
(13000*2).

So it is actually only 38 clip's thumbanils that could be transfered per 1meg 
of data transfer.

I'll try and be a bit more accurate as I make my next estimate :-)

If we assume that we are editing a 30 minute show, with 1 clip every second 
(an purposefully overestimate), we will hav 30*60 = 1800 clips, which adds up 
to approximately 45 meg of thumbnails.

I still think that we can get away with using either files or pipes - it will 
be rare that so many thumbnails will need to be generated, and it is not 
possible for them to all need to be generated simultaneously - they wouldn't 
fit on the screen :-)

Cheers,
Jason

-- 
Jason Wood
Homepage : www.uchian.pwp.blueyonder.co.uk