[Eug-lug] batch convert

[Allen Brown]

Thank you.  I guess I will stick with mogrify.  Altho it takes two
steps to do the operation, it's -geometry option allows me to
specify the bounding box for the thumbnail without knowing the
image size of the original.
--
Allen Brown
  work: Agilent Technologies      non-work: http://www.peak.org/~abrown/
        allen_brown at agilent.com	            abrown at peak.org
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On Sat, 21 Aug 2004, Jacob Meuser wrote:

> On Sat, Aug 21, 2004 at 11:59:32AM -0700, Allen Brown wrote:
> > mogrify is a cool command.  I've been using it for many years to
> > make thumbnails automagically.  But there is one thing that
> > annoys me.  There is no way to tell it to make the output filename
> > different from the input file.  So to make a thumbnail I have to
> >   cp ${fullsize}.jpg ${thumbnail}.jpg
> >   mogrify -options ${thumbnail}.jpg
> > 
> > Do you know of a more efficient way to do this?
> 
> use perl-magick?  I don't think IM has a way to do this better,
> but I could be wrong.  for jpegs, you could try using a djpeg|
> cjpeg pipe like the following:
> 
> $ djpeg -scale 1/4 full.jpg | cjpeg > thumb.jpg 
> 
> I often postprocess jpg images for web sites with a simple
> djpeg | cjpeg pipe like the following:
> 
> $ djpeg image-uncomp.jpeg | cjpeg > image.jpg
> 
> It's pretty fast, and it "optimizes" the images better than any
> other tool I have found, especially for images coming out of 
> the Gimp.
> 
> -- 
> <jakemsr at jakemsr.com>
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