Legacy ImageMagick Discussions Archive

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

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.

Legacy ImageMagick Discussions Archive

No delegates

No delegates

Re: No delegates