I recently moved to MediaTemple and installed ImageMagick and IMagick following their KB article here.
No error and phpinfo() show module correctly installed.
When I try to use IM on a JPG image via PHP I get this error
Uncaught exception 'ImagickException' with message 'no decode delegate for this image format
/home/149263/domains/wer.com/html/images/pictures/post/tmp/original/' @ error/constitute.c/ReadImage/544' in /nfs/c10/h04/mnt/149263/domains/wer.com/html/application/controllers/post.php:301
Stack trace:
#0 /nfs/c10/h04/mnt/149263/domains/wer.com/html/application/controllers/post.php(301): Imagick->__construct('/home/149263/do...')
#1 [internal function]: Post->filter('punch')
#2 /nfs/c10/h04/mnt/149263/domains/wer.com/html/system/core/CodeIgniter.php(359): call_user_func_array(Array, Array)
#3 /nfs/c10/h04/mnt/149263/domains/wer.com/html/index.php(217): require_once('/nfs/c10/h04/mn...')
#4 {main} thrown in /nfs/c10/h04/mnt/149263/domains/wer.com/html/application/controllers/post.php on line 301
However convert -list configure returns
DELEGATES bzlib djvu fontconfig freetype gvc jpeg jp2 lcms openexr png rsvg tiff wmf x11 xml zlib
and identify -list format returns
JPEG* JPEG rw- Joint Photographic Experts Group JFIF format (62)
JPG* JPEG rw- Joint Photographic Experts Group JFIF format
So it looks like the installation is correct.
ImageMagick 6.7.7-0 2012-05-22
imagick module version 3.1.0RC1
Any suggestions how to troubleshoot this?
Here's a quick and dirty on installing the latest (version 6.8.4-6 as of this writing) ImageMagick on Ubuntu 12.04.
Start by removing any old versions previously installed via apt-get:
sudo apt-get remove imagemagick
Then update apt-get and install some supporting packages:
sudo apt-get update
sudo apt-get install libperl-dev gcc libjpeg-dev libbz2-dev libtiff4-dev libwmf-dev libz-dev libpng12-dev libx11-dev libxt-dev libxext-dev libxml2-dev libfreetype6-dev liblcms1-dev libexif-dev perl libjasper-dev libltdl3-dev graphviz pkg-config
Use wget to grab the source from ImageMagick.org.
Once the source is downloaded, uncompress it:
tar -xzf ImageMagick.tar.gz
Now configure and make:
cd ImageMagick-6.8.4-6
./configure
sudo make
sudo make install
To avoid an error such as:
convert: error while loading shared libraries: libMagickCore.so.2: cannot open shared object file: No such file or directory
Add the following line to ~/.bashrc:
export LD_LIBRARY_PATH=/usr/local/lib
Update: If you still get an error like the one above, try running ldconfig:
sudo ldconfig
You can confirm the install and available formats with:
identify -list format
Have you tried running some code using Imagemagick through exec( ) to see if the problem is with Imagemagick or Imagick?
来源：https://stackoverflow.com/questions/10709488/imagemagick-missing-decode-delegates