Simple scripting help

Daravon · 03-15-2010, 06:28 PM

I use convert and mogrify to convert and mogrify images all the time. The syntax is

Code:

convert pic.jpg newoutputfilename.png

What I want to do is take a whole directory full of tiffs, and convert them to jpgs, with the same filename except for the .xyz. In order to do this, I think I need to do a "foreach".

I've done scripts like this before:

Code:

for pic in `ls *.jpg`; 
do mogrify -modulate 100,0  -normalize -unsharp 15 -fuzz 50% -trim $pic; 
done;

And it has been known to work. But how can I use this with convert? It seems that I need to somehow subtract "jpg" from each filename and append "tif" to form the new output filename, but I don't know how to manipulate strings with bash.

chrism01 · 03-15-2010, 08:40 PM

The 2nd example here http://linux.die.net/man/1/basename gives you the filename sans extension

penguiniator · 03-15-2010, 10:05 PM

Assuming pic is your control variable and bash is your shell:

Code:

${pic/%jpg/tif} or ${pic%.*}.tif