Comments on: Installing ImageMagick from Source on Ubuntu

By: Scottie

Scottie — Sat, 07 Apr 2012 17:37:50 +0000

The message “no decode delegate for this image format” means that imagemagick needs the proper library in Ubuntu in order to process the image type – in this case, JPG.

On 11.10, you should be able to do:

apt-get install libjpeg62 libpng12-0

Then you’ll need to recompile imagemagick.

Then when you type this:

identify -list configure

It should show you under LIBS that you have “ljpeg” and “lpng12″ installed, which should fix your error message – and allow processing of PNG image files, as well.

By: R Sarath

R Sarath — Sat, 07 Apr 2012 17:12:41 +0000

i am running ubuntu 11.10 .I install the source from http://www.imagemagick.org/download/ImageMagick-6.7.6-4.7z
when i want to convert the image to pdf i get the following error.
convert: no decode delegate for this image format `a.JPG’ @ error/constitute.c/ReadImage/533.
convert: missing an image filename `a.PDF’ @ error/convert.c/ConvertImageCommand/3017.

Please help

By: Ralph Haygood

Ralph Haygood — Mon, 30 May 2011 21:16:07 +0000

On an older version of Ubuntu (8.04.2), I found I also needed to update my JPEG- and PNG-processing libraries, else my nice new ImageMagick bungled operations on JPEG and PNG files. If you’re having trouble with these file types, try

sudo apt-get install libjpeg62-dev libpng12-dev

followed by rebuilding and reinstalling ImageMagick (step 7 onward).

By: Scottie

Scottie — Sun, 23 May 2010 18:28:45 +0000

@Peter Oops! Yup, you're right. I fixed it. Thanks!!

By: Peter

Peter — Sun, 23 May 2010 17:44:23 +0000

Hi, ins’t –prefix=/usr instead of –opt ?

Thanks,

Peter