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I need to convert batch of .jpg images filesize using image magick. am able to convert a single file using the following code

  convert -strip -interlace Plane -gaussian-blur 0.05 -quality 65% 1.jpg result.jpg

I need to do this convert for a batch of images. i tried this but it is not working

   mogrify -path \images-rep  -strip -interlace Plane -gaussian-blur 0.05 -quality 66% *.jpg
Dhinakar
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  • try to double the percentage symbol – npocmaka Jul 25 '14 at 07:18
  • What does "it is not working" mean? – MC ND Jul 25 '14 at 07:50
  • File size is not reducing – Dhinakar Jul 25 '14 at 08:11
  • When i used double (mogrify -path \images-rep -strip -interlace Plane -gaussian-blur 0.05 -quality 66%% *.jpg) also not working – Dhinakar Jul 25 '14 at 08:11
  • Is there any other way to reduce image size using mogrify – Dhinakar Jul 25 '14 at 08:15
  • i referred this link, may i know what is \R in the for loop in the http://nw2.us/wordpress/batch-compress-jpeg-with-imagemagick-windows/ – Dhinakar Jul 25 '14 at 08:22
  • According to [ImageMagick Command-line Options](http://www.imagemagick.org/script/command-line-options.php#quality) documentation about option **-quality** just the percentage value should be specified without percentage sign. Compare in this documentation `value` versus `value{%}`. So try just `-quality 65` – Mofi Jul 25 '14 at 08:32
  • I've tried with/without/doubled `%`, and everything works. So, sorry, just a silly question, what folder are you looking for file size? – MC ND Jul 25 '14 at 08:43

3 Answers3

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Use this command to convert your batch of images under a folder

   mogrify -path imagepath  -strip -quality 50% *.jpg
Prasath Bala
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To specify a maximum file size, mogrify -define jpeg:extent=300kb *.jpg. However, this can be much slower than just -quality 50% and/or -resize 50%. https://stackoverflow.com/a/11920384/2097284

Community
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Camille Goudeseune
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Reduce the depth of the image will reduce the size of the image

-depth 5
Cloy
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