Batch resize nautilus script

[sabmann]

Hi,

To batch resize all images in a folder, I do the following:

Make a new file (not as root):

gedit ~/.gnome2/nautilus-scripts/batch640x480

Then add the following:

#!/bin/sh
# author: Bas Wenneker
# email: sabmann [ta] gmail [tod] com
# Use this script to batch resize all images in a folder.
# First open the folder and then use the script.

for file in `ls -l`
do
name=`echo $file | cut -f1 -d.`
  convert -geometry 640x480 -quality 65 $file ${name}_640x480.jpg
done

Then make it executable:

chmod +x ~/.gnome2/nautilus-scripts/batch640x480

Then you're done. Go to the folder you'd like to resize. Then rightclick and find the 'batch640x480' script.
I use this script for resizing large amounts of photo's for a website. That's why the '-quality 65' is in the script. You can change the script to your needs. Click here for more convert commands.

Hope you'll find this usefull...

[linkunderscore]

Does this resize other images besides .jpgs?

For instance .svg?

[oxEz]

Does this resize other images besides .jpgs?

For instance .svg?

You cannot resize a .SVG directly.. svg files have no defined size. They're just a XML file at all !

[oofnik]

Thanks! I was looking for this. Since all the files I want to convert end in JPG, I changed 'ls -l' to 'ls | grep JPG' and it doesn't spit out a bunch of 'cannot find' things from ls. I've noticed though that the efficiency of the jpeg compressor in convert is not as good as the one gthumb uses. At quality setting 80, gthumb produces a file ~30 KB less. Oh well, it saves me a boatload of time

[sabmann]

I changed 'ls -l' to 'ls | grep JPG'

yes I tried your 'ls | grep JPG' but sometimes the extensions are different like .jpeg or the extension is in uppercase... so that's why I use the ls -l... But you are right about the cannot find * messages... I'll add it to my first post, thanks

[lhtown]

I got this script to work on Dapper. I made a couple of changes to the script so that it would save the new pictures into a separate directory that I called "thumbnails" instead of mingling them with my other pictures and also, I adjusted the picture size and quality to suit my preference. Also, I added the -strip argument so that it would strip out my exif information. My camera adds a lot of exif information and in my case, that saved me about 25-30kb per picture, which is a major difference for the web.

#!/bin/sh
# author: Bas Wenneker
# email: sabmann [ta] gmail [tod] com
# Use this script to batch resize all images in a folder.
# First open the folder and then use the script.
mkdir ./thumbnails
for file in `ls -l`
do
name=`echo $file | cut -f1 -d.`
  convert -strip -geometry 800x600 -quality 80 $file ./thumbnails/${name}_800x600.jpg
done

[Felix21685]

I got this script to work on Dapper. I made a couple of changes to the script so that it would save the new pictures into a separate directory that I called "thumbnails" instead of mingling them with my other pictures and also, I adjusted the picture size and quality to suit my preference. Also, I added the -strip argument so that it would strip out my exif information. My camera adds a lot of exif information and in my case, that saved me about 25-30kb per picture, which is a major difference for the web.

#!/bin/sh
# author: Bas Wenneker
# email: sabmann [ta] gmail [tod] com
# Use this script to batch resize all images in a folder.
# First open the folder and then use the script.
mkdir ./thumbnails
for file in `ls -l`
do
name=`echo $file | cut -f1 -d.`
  convert -strip -geometry 800x600 -quality 80 $file ./thumbnails/${name}_800x600.jpg
done

hey thanks lhtown for the updated version with quality difference and stating that you got it to work in dapper.
haha note if you try and resize a movie file it resizes each frame.

[MockY]

What am I missing? I have tried this script and others as well, but in all cases, only folders are made and the picture/s is not resized at all. Nothing happens. My guess is that I'm missing something but I don't know what it is.

[lhtown]

What am I missing? I have tried this script and others as well, but in all cases, only folders are made and the picture/s is not resized at all. Nothing happens. My guess is that I'm missing something but I don't know what it is.

Make sure you have imagemagick installed. The convert command that you see in the script is part of the imagemagick package.

You can install imagemagick easily using Synaptic or from the command line if you prefer using something like the following:

apt-get install imagemagick

[MockY]

I made sure I had it installed before I posted, which is why I think this is weird. Any other ideas?

EDIT: Just to be sure, I installed it using apt-get and it was successful. The reason why I didn't do that earlier was that Synaptic listed it as intalled.