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no decode delegate for this image format (PNG)

https://imagemagick.com/discourse-server/viewtopic.php?t=14301

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no decode delegate for this image format (PNG)

Posted: 2009-07-27T05:13:11-07:00
by Daniel_in_the_sky
Hi,
Im beginner in IM (my version 6.5.0-10)
i can't use convert png i have "no decode delegate for this image format"
1/ i install libpng 1.2.38
2/ i run 'convert -list configure'
i have

Code: Select all

Path: /usr/local/lib/ImageMagick-6.5.0/config/configure.xml

Name          Value
-------------------------------------------------------------------------------
CC            gcc -std=gnu99
CFLAGS        -fopenmp -g -O2 -Wall -W -pthread
CONFIGURE     ./configure  '--without-perl' '--enable-lcms'
COPYRIGHT     Copyright (C) 1999-2009 ImageMagick Studio LLC
CPPFLAGS      -I/usr/local/include/ImageMagick
CXX           g++
CXXFLAGS      -g -O2 -Wall -W -pthread
DEFS          -DHAVE_CONFIG_H
DELEGATES     jpeg lcms tiff
DISTCHECK_CONFIG_FLAGS --disable-deprecated --with-quantum-depth=16 --with-umem=no --with-autotrace=no --with-fontconfig=no --with-gslib=no --with-fontpath= --with-rsvg=no --with-xml=no
EXEC-PREFIX   /usr/local
HOST          i686-pc-linux-gnu
LDFLAGS       -L/usr/local/lib
LIB_VERSION   0x650
LIB_VERSION_NUMBER 6,5,0,10
LIBS          -lMagickCore -llcms -ltiff -ljpeg -lm -lgomp -lpthread
NAME          ImageMagick
PCFLAGS       -fopenmp
PREFIX        /usr/local
QuantumDepth  16
RELEASE_DATE  2009-04-11
VERSION       6.5.0
WEBSITE       http://www.imagemagick.org
what can i do ?
thank you very much for support.

Re: no decode delegate for this image format (PNG)

Posted: 2009-07-27T06:09:57-07:00
by magick
You need to install the PNG delegate library and its development package (which includes the required header files). Now run the configure script and verify that the PNG delegate library is validated. If not, check config.log to determine why validation failed, fix the problem, and rerun the configure script. Finally, type 'make install'.

Re: no decode delegate for this image format (PNG)

Posted: 2009-07-27T06:54:38-07:00
by Daniel_in_the_sky
PNG delegate library = libpng 1.2.38.tar.gz ?

When i try to install libpng devel
(sory i translate french to english)
error :

Code: Select all

erreur: needs:
        libpng12 = 1.2.38-alt1 is necessary for libpng-devel-1.2.38-alt1.i586
        zlib-devel est is necessary for libpng-devel-1.2.38-alt1.i586
        /bin/sh est is necessary for libpng-devel-1.2.38-alt1.i586
        /usr/lib/libpng12.so.0.38.0 is necessary for libpng-devel-1.2.38-alt1.i586
        /usr/lib/pkgconfig is necessary for libpng-devel-1.2.38-alt1.i586
        coreutils is necessary for libpng-devel-1.2.38-alt1.i586
        rpmlib(PayloadIsLzma) is necessary for libpng-devel-1.2.38-alt1.i586
what can i do ?

Re: no decode delegate for this image format (PNG)

Posted: 2009-07-27T07:04:55-07:00
by magick
It is beyond the scope of this forum to help you install delegate libraries. That has little to do with ImageMagick and more to do with Linux administration.

Re: no decode delegate for this image format (PNG)

Posted: 2009-07-27T10:48:01-07:00
by fmw42
suggest you look inside the libpng folder and review the INSTALL notes to see if it needs any other support delegates or look at the config.log file to see if it says what the error might be.

Re: no decode delegate for this image format (PNG)

Posted: 2009-07-27T11:02:04-07:00
by Daniel_in_the_sky
thank you i fixed my problem with IM réinstallation
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