Brian at 14:52, 14 March 2014

2014-03-14T14:52:17Z

Brian: /* Optimize a Single Image */

2014-03-11T20:18:42Z

‎Optimize a Single Image

Brian: Created page with "==How to compress a jpg image on Centos== The other day I was running a webpagetest on a clients site and the results were telling me to Compress Images Now there was close ..."

2014-03-11T20:17:14Z

Created page with "==How to compress a jpg image on Centos== The other day I was running a webpagetest on a clients site and the results were telling me to Compress Images Now there was close ..."

New page

==How to compress a jpg image on Centos==

The other day I was running a webpagetest on a clients site and the results were telling me to Compress Images

Now there was close to 200 images that needed to be compressed and optimized. That is when I found jpegoptim

You can learn more about jpegoptim, by reading the man page.

===Optimize a Single Image===

If you are looking to optimize a single image, you would just type

jpegoptim image.jpg

Sample output

image.jpg 710x275 24bit P JFIF [OK] 136256 --> 136256 bytes (0.00%), optimized.

===Optimize all JPEG images===

You can use the find command to locate all *.jpg images under your current directory by using the following

for x in $(find $PWD -iname "*.jpg"); do jpegoptim $x; done

By default it will optimize all images in their current locations.

===Optimize all JPEG images and convert to Progressive===

You will also get a boost in load speeds by converting all images to use progressive, meaning that the entire images does not need to load before going to next request.

for x in $(find $PWD -iname "*.jpg"); do jpegoptim --all-progressive $x; done

Now rerun your webpagetest and see the differences

Here are our results - http://www.webpagetest.org/result/140311_HN_10Z0/

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	Here are our results - http://www.webpagetest.org/result/140311_HN_10Z0/		Here are our results - http://www.webpagetest.org/result/140311_HN_10Z0/
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 Sample output
-  image.jpg 710x275 24bit P JFIF  [OK] 136256 --> 136256 bytes (0.00%), optimized.
+  image.jpg 710x275 24bit N JFIF  [OK] 143161 --> 136256 bytes (4.82%), optimized.
 ===Optimize all JPEG images===

Batch jpeg Image Optimization - Revision history

Brian at 14:52, 14 March 2014

Brian: /* Optimize a Single Image */

Brian: Created page with "==How to compress a jpg image on Centos== The other day I was running a webpagetest on a clients site and the results were telling me to Compress Images Now there was close ..."