[KPhotoAlbum] Checking image file readability by MIME type, rather than file name

Robert L Krawitz rlk at alum.mit.edu
Fri May 11 01:15:17 CEST 2007

   Date: Fri, 11 May 2007 02:05:58 +0300
   From: "Risto H. Kurppa" <risto at kurppa.fi>
   Cc: kphotoalbum at kdab.net

   2007/5/11, Robert L Krawitz <rlk at alum.mit.edu>:
   > I vote against this patch, on performance grounds.  Example: the Canon
   > Digital Rebel produces thumbnail files (.thm, which are JPEGs) for
   > each raw image.  As written, every time you scan for new images, it
   > will have to check each of these files.  At present, it skips them
   > because the .thm suffix isn't known.
   > (For that matter, there's another problem with this -- it will read
   > the .thm files, see that they're actually JPEGs, and import them.
   > That's likely to be undesirable in its own right.)

   Happy you. I have Nikon D70 that produces NEF (.nef) and then I run
   a script to create corresponding jpegs (.nef.jpg to tell me that
   there's a high-quality NEF available). So if it only would be
   possible to to have an option to make KPA ignore all .nef files
   (but not .nef.jpg) I'd be happy..

   File exclusion / filter has been discussed earlier and no actual
   decisions have been made. I'm really looking forward to see Tuomas
   finish the SQL backend: performance and possibility to manage file
   types.. But if there will be some modification on file name / type
   recognition I think this needs to be discussed again to find the
   perfect solution..

Performance and scalability are absolutely essential for this kind of
application.  If it doesn't work well in all respects on very large
collections of images, it isn't worthwhile to have to learn the added
complexity.  That includes things like selecting the right images.

Robert Krawitz                                     <rlk at alum.mit.edu>

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