# Gallery- thumbnails problem

**URL:** <https://www.ruby-forum.com/t/gallery-thumbnails-problem/112105>\
**Category:** Radiant CMS\
**Created:** [August 15, 2007, 1:48pm UTC](https://www.ruby-forum.com/t/gallery-thumbnails-problem/112105 "2007-08-15T13:48:07Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![yodla](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/a9adbd/32.png) [@yodla](https://www.ruby-forum.com/u/yodla)\
**Post date:** [August 15, 2007, 1:48pm UTC](https://www.ruby-forum.com/t/gallery-thumbnails-problem/112105/1 "2007-08-15T13:48:07Z")

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Hi everyone. i have installed Gallery Extension + Rmagick. When im  
adding images to gallery tumbnails for JPG files are not generated. It  
works fine for files like(\*.ico, \*.gif) - images are thumbnails are  
generated. I have installed imagemagick do i have to install something  
more(like graphicsmagic)? pls help

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<div class="post-metadata">

**Author:** ![yodla](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/a9adbd/32.png) [@yodla](https://www.ruby-forum.com/u/yodla)\
**Post date:** [August 15, 2007, 7:16pm UTC](https://www.ruby-forum.com/t/gallery-thumbnails-problem/112105/2 "2007-08-15T19:16:08Z")

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it think it is becouse i miss library for r magick.  
error:“No decode delegate for this image format.”

if found JPG library on  
[http://rmagick.rubyforge.org/install-faq.html#imprereq](http://rmagick.rubyforge.org/install-faq.html#imprereq)  
but i dont know kow to install it. im using gentoo

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<div class="post-metadata">

**Author:** ![yodla](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/a9adbd/32.png) [@yodla](https://www.ruby-forum.com/u/yodla)\
**Post date:** [August 16, 2007, 1:42am UTC](https://www.ruby-forum.com/t/gallery-thumbnails-problem/112105/3 "2007-08-16T01:42:49Z")

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solved