[CentOS] SERIOUSLY OT STREAM EDITING IMAGES

Tue Jul 15 19:58:38 UTC 2008
Chris Payne <chris.payne at triumf.ca>

On Tue, Jul 15, 2008 at 09:47:26PM +0200, Chris Geldenhuis wrote:
> I have been Googling my head off but cannot find a method to stream edit 
> all the images in a directory and to resize them. I have a large number of 
> images of up to 3GB in size that I want to put in albums on a website, but 
> before I do this I need to resize them to a more realistic configuration.
> 
> I know how to do this manually with the GIMP but it becomes tedious for 
> more than a few images.
> 
> Running CentOS 5 as virtualised under XEN as a web server.

I wrote a shell script to do just that, attached below. It requires a couple 
of readily available command line tools from the packages:

netpbm-progs
libjpeg

And of course you can tune the scaling and quality to suit your needs.

HTH
Chris
--
Chris Payne			chris.payne at triumf.ca
TRIUMF ATLAS Tier-1 System Administrator - Networking
TRIUMF				+1 604 222 7554
4004 Wesbrook Mall, Vancouver, BC, V6T2A3, CANADA



#!/bin/sh
  for file in $* ; do
    base=`basename $file`
# change depending on your camera file extension
	prefix=`echo $base | sed -e "s/\.jpg//i"`
#	prefix=`echo $base | sed -e "s/\.jpeg//i"`
    if [ -f $prefix.small.jpeg ] ; then
    	echo skippin $file
    else
        echo shrinkin $file 
    	jpegtopnm $file | pnmscale .35 | cjpeg -quality 75 > $prefix.small.jpg
   fi
   done