[magick-users] recursive mogrify operations

[Anthony Thyssen]

Brian Jackson on  wrote...
| On Wednesday 26 December 2007 06:24, Vedran Vucic wrote:
| > Hello,
| >
| > I want to do massive  mogrify  actions on large hard disk with
| > many subfolders.
| > I have to do that in Windows XP.
| > How can I do that recursively so one command can perform mogrify in all
| > subfolders-
| >
| > Advice for Linux is welcome too.
| 
IM Examples, Basics, Mogrify, is highly recomended reading...

  http://imagemagick.org/Usage/basics/#mogrify


| Assuming there's NOTHING but images in the directories....
| find [directory] -type f | xargs mogrify [mogrify options]
| 

You can expand that to match a specific file format

  find [directory] -type f -name '*.gif' | xargs mogrify ...

Or better still if you have a modern UNIX like system use...

  find ..as previous..  -print0 | xargs -0 ..as previous..

This changes the pipeline output of file to be 'null' (or zero character
code) seperated filenames, which will work properly for unusual
filenames like files with spaces, newlines, or other weird
meta-characters.


WARNING WARNING WARNING.....

"mogrify", and all other IM commands will also expand a
filename containing shell meta-characters such as '*' and '?'.  This is
done to allow the use of these meta-characters on the old DOS command
line shell. However this could cause a bug, repeated mogrify exectution,
or posibly even a 'hack' from a some evil source.  Caution is advised.

  Anthony Thyssen ( System Programmer )    <A.Thyssen at griffith.edu.au>
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