Thread:Project:Support desk/unable to resize GIF images in mediawiki/reply (2)

If you're talking about a GIF created with camtasia, I'm supposing you're talking about an animated gif. This could result on a large file size. Resizing such image may need a lot of time or memory.

MediaWiki limits the amount of memory, time and resulting files when resizing images (and other operations), so it may be the problem. You may try increasing $wgMaxShellMemory, $wgMaxShellTime or $wgMaxShellFileSize.