It seems that the shell string parameters order in the command line built by lib/ezimage/classes/ezimageshellhandler.php is wrong with ImageMagick ( 6.4.4 installed on our server ).

Example of a shell string generated by eZImageShellHandler :

/usr/bin/convert [options] 'source.jpg' 'JPEG:destination.jpg'

When using the filter shown in the "Steps to reproduce", this command line doesn't work.

It must be :

/usr/bin/convert 'source.jpg' [options] 'JPEG:destination.jpg'

So, you have to :

move this line ( 111 )

$argumentList[] = eZSys::escapeShellArgument( $sourceMimeData['url'] );

after this line ( 78 )

$argumentList[] = $executable;

in lib/ezimage/classes/ezimageshellhandler.php.

With this change, the command line works.

I don't know if this is a bug or an ImageMagick specific case...

Steps to reproduce

1. Create a new filter and a new alias in image.ini.append.php :

[ImageMagick]
Filters[]=geometry/scaleexactwithbackgroundcolor=-resize %1x%2> -size %1x%2 xc:#%3 +swap -gravity center -composite

[AliasSettings]
AliasList[]=my_image

[my_image]
Reference=reference
Filters[]=geometry/scaleexactwithbackgroundcolor=400;100;00FF00

2. Create a class with an image attribute

3. Create a new object

4. In a template, display this image using the my_image alias. This doesn't work : the command line built by the convert function of eZImageShellHandler class is wrong : the source file is at the end of the command line ( before the destination file ) instead of being at the beginning