Manual:$wgCustomConvertCommand/en

Details
To use another resizing converter, e.g. GraphicMagick, set this variable to the command-line string required to launch the executable. If no string is specified, then MediaWiki's internal resizing code will be used.

In the command-line string, the following variables will be expanded:


 * %s will be replaced with the source path
 * %d will be replaced with the destination
 * %w will be replaced with the width
 * %h will be replaced with the height

Examples
This is the command you would set for GraphicMagick:

Bitmaps vs. SVG
is only used for Bitmaps. If you're looking for an alternative to ImageMagick to convert your SVG files, you need to use.