Batch converting icons, help please?

[Fzang]

I have a lot of .png icons. I need to batch resize them all into 20x20 and put "small-" in front of all names.

Is there something that can do that for me?

[unutbu]

Many people recommend Phatch (a GUI program) for doing batch resizing (and other operations). I don't know if it can rename the files too.

An alternative is to use the command-line:

Install the imagemagick package

Make a copy of the originals:

rsync -a /path/to/source/ /path/to/dest

Batch resize the pngs:

cd /path/to/dest
mogrify -resize 20x20! *.png

Rename the pngs:

rename 's//small-/' *.png

Note that if the image files end in .PNG rather than .png, then you have to change 'png' --> 'PNG' in the commands above. In other words, the commands are case-sensitive.