I\'m trying to convert an image with imagemagick, but I\'m getting this error:
convert: no decode delegate for this image format `//i.imgur.com/nTheJ.
from Phillip Ingram somewhere on the interwebs:
in gentoo use
sudo EXTRA_ECONF="--with-png --with-jpeg" emerge imagemagick"
This is slightly different than Jonathan Horseman's answer since it wasn't an error but rather a need to specify more during the installation.
But the identify command was very useful.
Hope this helps someone (and perhaps me in the future ;).