ImageMagick: No decode delegate for this image format `' @ error/constitute.c/ReadImage/504

Question

Problem: ImageMagick convert is unable to crop image. It looks like it doesn't recognize the image type?

What I've Tried:

I've searched around online and I've seen several similar issues but not mine. I've attempted their solutions including

• Uninstalling and reinstalling ImageMagick via brew.
• identify -list format (JPEG, GIF, PNG, TIFF, etc were all there and all had rw permissions)
• convert -version (png is is among the built-in delegates)
• convert pic1.png pic1-jpg.jpg (this worked fine)
• convert pic1-jpg.jpg pic1-jpg.jpg (this worked fine)
• convert pic1-jpg.jpg 805X972+34+94 pic1-jpg-crop.jpg (this gave the same error as for png as shown below)

 

I'm working on Mac OSX El Capitan and everything else in terminal works fine. ImageMagick was already installed.

When I run:

$ convert /Users/Innovate/Desktop/crop/2015-04-26-GinaDate13_487.png 805X972+34+94 /Users/Innovate/Desktop/crop/2015-04-26-GinaDate13_487-cropped.png 

I get:

convert: unable to open image `805X972+34+94': No such file or directory @ error/blob.c/OpenBlob/2702.

convert: no decode delegate for this image format `' @ error/constitute.c/ReadImage/504.

no decode delegate for this image format `' @ error/constitute.c/ReadImage/504

In the other posts on this issue, people get

convert no decode delegate for this image format `PNG'

Or similar (except with their image type or filename and image type)

 

However, mine doesn't say anything about image file type...

I have not tried uninstalling ImageMagick then installing it manually from sources because I'm not very confident at doing that... (this solution was shown: https://stackoverflow.com/a/34633084/5398660 )

Does anyone know what might be going on?

Also, can anyone help me interpret the @ error/constitute.c/ReadImage/504 part? I'm looking at the code for constitute.c but I'm not sure if I can get useful information from it to solve my problem (I only know a bit of C)

Thank you!

Solution 1

brew remove imagemagick //to delete current version
brew install imagemagick --build-from-source

fixed it for me on mac

Solution 2

I had the same error on Ubuntu 20.04 and ImageMagick. Had to reinstalled ImageMagick with all add ons according to this instruction:

#These are the steps required in order to Install ImageMagick with JPG, PNG and TIFF delegates.

sudo apt-get update 

#Install Build-Essential in order to configure and make the final Install

sudo apt-get install build-essential 

#libjpg62-dev required in order to work with basic JPG files

sudo apt-get install -y libjpeg62-dev 

#libtiff-dev is required in order to work with TIFF file format

sudo apt-get install -y libtiff-dev 

#Download ImageMagick

wget https://www.imagemagick.org/download/ImageMagick.tar.gz 

#Untar Imagemagick

tar xvzf ImageMagick.tar.gz 

#Access the working directory

cd ImageMagick/[version_number] 

#Configure and make sure to disable the "shared" option

./configure --disable-shared

#Make

sudo make

#Install

sudo make install

#Final Check

sudo make check

Solution 3

Throwing in my two cents as I too have struggled with this problem for the last few days. I had no problem running ImageMagick commands on my local machine, but got the error message as mentioned by OP when I ran the command from a Tomcat server running on Azure Cloud.

I could identify the cause by running the following command:

convert -list format

On my local machine, it would return quite a long list of all the supported formats, whereas on Kudu (Azure CLI tool) it would return an empty result. This indicates ImageMagick didn't find the path to its DLL files required for processing.

In my case, the problem was simply caused by a lack of configuration on Azure:

• The absence of the ImageMagick root folder in the system environment variable %PATH%
• The absence of an environment variable "MAGICK_HOME" (set to the root folder of your ImageMagick installation directory)
• The absence of an environment variable "MAGICK_CODER_MODULE_PATH" (set to the folder mentioned above + /modules/coders)

NOTE: for people who are also experiencing this problem on Azure, you can have a look at this SO answer which explains how to add an environment variable using an XDT Transform.

Solution 4

Alright, with playing around I figured out the solution and I'm posting it here for other people who might run into this issue:

Apparently, this is not/no longer is/not for me the way to crop an image using ImageMagick convert. Even though this usage is shown here it did not work for me using El Capitan (maybe it's the OS?).

Instead of using

convert img.png 805X972+34+94 img-crop.png

The correct command, which works is:

convert image.png -crop 805X972+34+94 image-crop.png

 

That is, the command goes:

convert image.ext -crop heightXwidth+positionX+positionY* imagecropped.ext

 

 

More can be found here. From the description on that ImageMagick page I was confused about the example where they have convert rose: -crop but you can just use it the way I mentioned above and it works fine.

Solution 5

Install ImageMagick with JPG, PNG and TIFF Delegates - Ubuntu (20.04)

Approach 1

Chances are, ImageMagick is already installed on your computer if you are using some flavor of Linux, and its likely not installed if you are using some form of Windows. In either case, you can type the following to find out:

1. Clone the source repository:

git clone https://github.com/ImageMagick/ImageMagick.git ImageMagick-7.1.0    

2. Next configure and compile ImageMagick. Note the pkg-config script is required so that ImageMagick can find certain optional delegate libraries on your system. To configure, type:

   cd ImageMagick-7.1.0
   ./configure
   make
   

3. If build fails, try gmake instead. For advanced users, we recommend a modules build:

   ./configure --with-modules
   

4. If ImageMagick configured and compiled without complaint, you are ready to install it on your system. Administrator privileges are required to install. To install, type

   sudo make install
   

5. You may need to configure the dynamic linker run-time bindings:

   sudo ldconfig /usr/local/lib
   

6. Finally, verify the ImageMagick install worked properly, type

   /usr/local/bin/convert logo: logo.gif
   

7. For a more comprehensive test, run the ImageMagick validation suite. Ghostscript and Freetype are prerequisites, otherwise expect the EPS, PS, PDF and text annotations tests to fail.

   make check
   

Approach 2

Follow the below link

Install ImageMagick with JPG, PNG and TIFF Delegates - Ubuntu (20.04)

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