need help with imagemagic....batch resize

zeltak · 04-03-2008, 04:21 AM

Hi all

I am moding a icon theme (will post it once finished) to my liking. I have a Q for the command line gurus. I have edited the icon theme for the 128 size. the 128 folder has 6 directories with pngs in them. i want to use image magic to resize the whole directory to 64x64 size while keeping the folder structure, is it possible?

thx alot in advance

Zeltak

bigrigdriver · 04-03-2008, 04:33 AM

Nested for loops might work. Something like:

Code:

#!/bin/bash
for i in /path/to/top/leveŀ/folder/*; do
       for i in *.png; do
            imagemagick resize command
       done;
 done

zeltak · 04-03-2008, 04:46 AM

Hi

Thx alot for the answer, but i am pretty new to the whole command line thing

. So far ive created a txt file with this

#!/bin/bash
for i in /media/thd/DL-Web downloads/scale/128x128/; do
for i in *.png; do
mogrify -resize 16x16 *.png
done;
done

but it dosent seem to work. am i totally off here?

sorry for the ignorance

Zeltak

bigrigdriver · 04-03-2008, 10:34 AM

Now that you have created the shell script (the text file containing the code), you must make it executable before you can use it.

In a console, cd (the command to change directory) to the directory containing the script. Issue the command ls -l <scriptname>, where <scriptname> is the name of your script. ls -l shows a long lising which includes the permissions for owner/group/others (rw-rw-r--, or something similar. The dash is the place for the x letter, which indicates executable (for a file) and permission to enter (for a folder).

To make your script executable, issue the command chmod +x <scriptname> (to give executable to the owner, members of the group,and all others. Issue the command chmod u+x <scriptname> to give execute permission to the owner only.

Then, to execute the script, ./<scriptname>. The leading ./ means "in this directory".
Or, from anywhere in the directory tree, just give the full path to the executable to run it: /media/thd/DL-Web downloads/scale/128x128/<scriptname>.

Note that you may use the script in your own home folder without restriction. To use it in a folder normally restricted for users, you wil have to run the script as root.

Tinkster · 04-03-2008, 12:29 PM

Quote:

but it dosent seem to work. am i totally off here?

sorry for the ignorance

The issue is most likely with the path-name with
the space in it. Always a bad idea.

Code:

find /media/thd/DL-Web\ downloads/scale/128x128/ -type f -iname \*png -exec mogrify resize 64x64 {} \;

Cheers,
Tink

kotnik · 04-03-2008, 12:33 PM

If your icon files have spaces in its names, then use modified Tink's oneliner:

Code:

find /media/thd/DL-Web\ downloads/scale/128x128/ -type f -iname \*png -exec mogrify resize 64x64 "{}" \;

konsolebox · 04-04-2008, 01:05 AM

perhaps you mean something like this?

Code:

#!/bin/bash
for i in /media/thd/DL-Web downloads/scale/128x128/*.png; do
	mogrify -resize 16x16 "${i}"
done

zeltak · 04-04-2008, 11:59 PM

Hi

thank you all for your reply! konsolebox your suggestion did the trick exactly!

thanks again, you guys saved me a ton of time!

Zeltak

konsolebox · 04-05-2008, 09:34 PM

no prob. you're welcome... but i wonder how the code worked.. the space should have a backslash before it:

Code:

#!/bin/bash
for i in /media/thd/DL-Web\ downloads/scale/128x128/*.png; do
	mogrify -resize 16x16 "${i}"
done

zeltak · 04-05-2008, 11:47 PM

I changed the directory ;-)

thx again

Zeltak