ImageMagick no decode delegate

Question

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.

Answer 1

on Ubuntu 16, I had to install the following first (this was not a dev machine but a server):

sudo apt-get install autoconf automake autotools-dev libtool pkg-config 

then to enable the PNG and JPG delegates :

sudo apt-get install libpng12 libpng12-dev libjpeg libjpeg-dev

followed by

./configure

(Which should now show that the delegates are enabled)

and then rebuild (make clean && make then sudo make install)