ImageMagick no decode delegate

问题:

I'm trying to convert an image with imagemagick, but I'm getting this error:

convert: no decode delegate for this image format `//i.imgur.com/nTheJ.jpg' @ error/constitute.c/ReadImage/532.

I'm doing this:

convert http://i.imgur.com/nTheJ.jpg -resize 600×600 filarkiv/billeder/produkter/s236-085145.jpg

I have the following delegates:

DELEGATES freetype jpeg jng mpeg png x11 xml zlib

Anyone knows what the problem is?

回答1:

substitude the × in -resize 600×600 with a capital X and it should work.

-resize 600X600

回答2:

I had this error when rendering an image using DragonFly in Rails. This happened after I upgraded to Lion (ImageMagick was installed using Brew).

I reinstalled ImageMagick, jpeg, libtiff and jasper (reinstalling ImageMagick wasn't enough by itself).

brew uninstall imagemagick jpeg libtiff jasper brew install imagemagick

Prior to that, running

identify -list format

and jpeg wasn't in the list. After reinstalling the above packages jpeg appeared in the list.

回答3:

for me:

 brew reinstall imagemagick --with-libtiff

saved the day when dealing with a similar problem, but for tiff files.

UPDATE: one year later and this remains the only way I can get tiff working properly in convert on MacOS X.

回答4:

I faced the same problem recently. After Googling for couple of hours, I found out that reason was a CONFLICT between php extentions Gmagick & Imagick. Commenting gmagick.so in php.ini fixed the problem. Hope this will save someone time :)

回答5:

from Phillip Ingram somewhere on the interwebs:

in gentoo use

sudo EXTRA_ECONF="--with-png --with-jpeg" emerge imagemagick"

This is slightly different than Jonathan Horseman's answer since it wasn't an error but rather a need to specify more during the installation.

But the identify command was very useful.

Hope this helps someone (and perhaps me in the future ;).

回答6:

In my case, the solution was a matter of ending the command with *.{jpg,png} rather than *.

I believe the * was picking up / trying to convert hidden files.

回答7:

redhat4.8, If you install from source, may be can try:

yum remove libjpeg

wget http://www.imagemagick.org/download/delegates/jpegsrc.v9a.tar.gz

sudo tar xvf jpegsrc.v9a.tar.gz -C /usr/local/src/

cd /usr/local/src/jpeg-9a

./configure --enable-shared

make

sudo make install

than turn in ImageMagick

cd ImageMagick-6.9.6-4

./configure

sudo make install

sudo ldconfig /usr/local/lib

回答8:

I have encountered a similar problem with TIFF files on ImageMagick v7.0.4-5 on Windows 7.

If this question concerns a Windows OS, then the cause is that Windows can't find the Jpeg (in my case, TIFF) file library (DLL).

Cause

I had installed ImageMagick without adding it to the Windows $PATH.

Error message

This resulted in error

identify: unable to load module 'C:\Program Files\ImageMagick-7.0.4-Q16\modules\coders\IM_MOD_RL_TIFF_.dll': The specified module could not be found.  @ error/module.c/OpenModule/1279. identify: no decode delegate for this image format `TIFF'  @ error/constitute.c/ReadImage/509.

Solution

• Re-install ImageMagick and do add it to the $PATH, so that it can find libtiff. Restart your command shell as well.
• First cd into ImageMagick's install folder before executing it.

转载请标明出处:ImageMagick no decode delegate

文章来源: ImageMagick no decode delegate