Re: JPEG thumbnailing latency

[Christian Kirbach <christian kirbach googlemail com>]

On Mon, 09 Jun 2008 06:50:58 -0500, Dr. Michael J. Chudobiak  
<mjc avtechpulse com> wrote:

> Mike Rooney wrote:
> No, bug 536673 says the files are not thumbnailed at all under some  
> conditions. It is not a question of speed.
>
> Thumbnailing is a slow process (especially for raw files) since it is  
> compute and io intensive (i.e., lots of matrix algebra + large files).

That is not neccessarily true. I know that  the Nikon RAW file format also  
stores jpeg
encoded preview images ('thumbnails') within the RAW file, enabling a real  
quick preview.
And I bet all modern digital cameras do when shooting in RAW mode.
But I don't know whether ufraw is used by nautilus with this option

 --embedded-image
               Extract the preview image embedded in the raw file instead  
of
               converting the raw image.


This will clearly speed things up seriously.


--
Christian Kirbach
Christian Kirbach googlemail com