how to make .jpg images in one folder have smaller size.

[shirish]

Hi all,
First of all thank you for making imagemagick. I am using the following version :-

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$ convert --version
Version: ImageMagick 6.7.7-10 2014-03-03 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2012 ImageMagick Studio LLC
Features: OpenMP    

This is in debian testing and it will take sometime for the new version to come down to testing. We do have the new version in the archive due to our active maintainer.

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$ apt-show-versions -a imagemagick
imagemagick:amd64 8:6.7.7.10+dfsg-1 install ok installed
imagemagick:amd64 8:6.7.7.10+dfsg-1 testing      debian.ec.as6453.net
No testing-updates version
imagemagick:amd64 8:6.7.7.10+dfsg-1 unstable     debian.ec.as6453.net
imagemagick:amd64 8:6.8.8.2-1       experimental debian.ec.as6453.net

Now I have got a few images from a digital camera in the form of .jpg images. These images are quite large and I want them to be smaller but do not want to make any changes on the original images (in case something goes wrong or something.) While I did found that it's easier to do the same on a single image I do not know how to do the same when there are bunch of images in the same folder.

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$ ll -h sample.JPG
-rw-r--r-- 1 shirish shirish 6.5M Mar 14 14:45 sample.JPG

$ convert -define jpeg:extent=1024kb sample.JPG sample2.JPG

$ ll -h sample2.JPG
-rw-r--r-- 1 shirish shirish 982K Mar 14 14:46 sample2.JPG

Now is there a way to do mass-conversion of the images to a smaller size and have them some unique name or just add a count or something to it ?

Looking forward to answers.

[glennrp]

I usually do "mogrify -format jpg [options] *.JPG"
That way I'll have my original DSCnnnnn.JPG along with the modified DSCnnnnn.jpg. I find it
convenient to have the same basename for both.