composite: no decode delegate for this image format src.jpg

Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".
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Post by magick »

  • identify -list format
Chances are JPEG is not listed or its listed with a mode of --- which means it read or write it. This simply means that the JPEG delegate library was not available to ImageMagick when it was built/installed. Grab the source and run the configure script. Look at the last 40 or so lines and it probably says the JPEG library was not validated. Check config.log for the reason why. Fix the problem and rerun the configure script until it validates the JPEG library. Now build and install and ImageMagick will be able to read/write JPEG images.