No delegates

[furripuyi]

Hi everyone,

I just installed ImageMagick on a Ubuntu 14.04 (64 bit) Machine from the Unix source. It all seemed to have worked during the installation but there seems to be a problem with the file formats I am allowed to manipulate with the convert command.

For example, running:

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convert -negate smile.gif negativesmile.gif

works like a charm. However, using virtually any other image format returns an error. Since I wanted to use this tool with .jpeg images, I tried:

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convert -negate sunset.jpeg negativesunset.jpeg

with a .jpeg image of a sunset, which returns:

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convert: no decode delegate for this image format `JPEG' @ error/constitute.c/ReadImage/509.

I then used:

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convert -version

to find out the ImageMagick version, which returns:

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Version: ImageMagick 7.0.7-11 Q16 x86_64 2017-11-15 http://www.imagemagick.org
Copyright (c) 1999-2017 ImageMagick Studio LLC
License: http://www.imagemagick.org/script/license.php
Features: Cipher DPC HDRI OpenMP
Delegates (built-in):

which doesn't show any delegates. It seems to me these delegates are the root of the problem but I couldn't find a way to solve it. As you may have noticed by now, I'm pretty new to ImageMagick in particular and Linux in general, so I would be very grateful for any hints you may have!

Thanks in advance!
Daniel

[fmw42]

How did you install ImageMagick? If from source, you will not get any delegates. You must install those delegates before installing IM. It is a pain if you do that. You need to use an RPM, I think to install everything. See http://www.imagemagick.org/script/download.php for installing binaries. I do not use Linux, so you may need further help from a Linux user.

Delegates can be found at http://www.imagemagick.org/download/delegates/, if you want to try installing manually from source.