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no decode delegate for this image format

https://imagemagick.com/discourse-server/viewtopic.php?t=13420

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no decode delegate for this image format

Posted: 2009-03-26T02:46:47-07:00
by stefano@BL
Hi,
I have this error message when I run a convert or identify command:

Code: Select all

no decode delegate for this image format `image.jpg' @ constitute.c/ReadImage/526.
Using

Code: Select all

convert -list configuration
I see the deletages row is empty.

How can I configure the delegates? What does I have to configure?

Thank you
bye
stefano

Re: no decode delegate for this image format

Posted: 2009-03-26T05:26:52-07:00
by magick
When you build ImageMagick from source you must first install any delegate libraries and their headers before you run the configure script. Install the JPEG delegate library and its headers so that jpeg.h is on your system. Under Linux, for example, you need to install libjpeg and libjpeg-devel. Next, run the ImageMagick configure script and review the last 30-40 lines of output. Make sure the output shows that the JPEG library was found and validated. Now build and install ImageMagick and you will have support for JPEG images.
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