Image conversion from IFF and EXR formats to JPEG format - imagemagick

Question

I am using convert Desktop/iff_image.iff Desktop/iff_image.jpg to convert my images to JPEG format.
But getting as
convert: no decode delegate for this image format `Desktop/iff_image.iff' # error/constitute.c/ReadImage/552.
convert: no images defined `Desktop/iff_image.jpg' # error/convert.c/ConvertImageCommand/3127.
For .tif, .tiff, .cin, .dpx extensions it is working properly.
The issue is coming only for .iff and .exr extensions.

Answer 1

IFF
I am not familiar with a format named 'IFF'. Sorry to be of no help for this one...
EXR
For support of reading and writing the EXR format, your ImageMagick installation needs to have...
...access to the OpenEXR library (which also must be installed on your system);
...been built with support for the OpenEXR delegate.
In ImageMagick, 'delegates' are external programs or helper utilities which support ImageMagick to handle formats which it cannot handle on its own.
One of the most common delegates found in ImageMagick is Ghostscript. Ghostscript is required to process PDF or PostScript input files, because ImageMagick can only handle raster formats. So Ghostscript converts PDFs and PS to raster images on behalf of ImageMagick, then hands over these raster data to IM, which then does the rest of the required work.
To print the list of all built-in delegates, run this command (on Linux or Mac OS X):
convert -version | grep Delegates
The respective Windows command is:
convert -version | findstr Delegates
The output I see on my system for this command is this:
Delegates (built-in): bzlib cairo djvu fftw fontconfig freetype gslib gvc jbig \
jng jp2 jpeg lcms lqr ltdl lzma openexr pangocairo png \
ps rsvg tiff webp wmf x xml zlib
The list of supported delegates should have openexr amongst them. If it is not there, you need to install a version of ImageMagick that has it.
To check which compile-time options have been used to build your version of ImageMagick, run
convert -list configure
If the linen starting DELEGATES does not list openexr, the binary package for your system has not been built with OpenEXR in mind. If it is listed, but still not working, something else is wrong...
On my system, I see this:
Path: /opt/local/lib/ImageMagick-6.9.0//config-Q16/configure.xml
Name Value
-------------------------------------------------------------------------------
CC /usr/bin/clang
CFLAGS -I/opt/local/include/lqr-1 -I/opt/local/include/glib-2.0 \
-I/opt/local/lib/glib-2.0/include -I/opt/local/include \
-I/opt/local/include/freetype2 -I/opt/local/include \
-I/opt/local/include/libpng16 -pipe -Os -arch x86_64 \
-Wall -march=corei7-avx -fexceptions -D_FORTIFY_SOURCE=0 \
-D_THREAD_SAFE -pthread -DMAGICKCORE_HDRI_ENABLE=0 \
-DMAGICKCORE_QUANTUM_DEPTH=16
CODER_PATH /opt/local/lib/ImageMagick-6.9.0/modules-Q16/coders
CONFIGURE ./configure '--prefix=/opt/local' '--enable-shared' \
'--enable-static' '--disable-ltdl-install' \
'--disable-silent-rules' '--with-frozenpaths' \
'--with-openexr' '--disable-hdri' '--with-dps' \
'--with-bzlib' '--with-djvu' '--with-fontconfig' \
'--with-gslib' '--with-jbig' '--with-jpeg' '--with-lcms' \
'--with-openjp2' '--with-png' '--with-tiff' '--with-webp' \
'--with-zlib' '--with-modules' '--with-xml' \
'--without-perl' '--without-fpx' '--with-wmf' \
'--with-gvc' '--with-rsvg' '--with-lqr' '--with-pango' \
'--with-x' '--with-gs-font-dir=/opt/local/share/fonts/urw-fonts' \
'CC=/usr/bin/clang' 'CFLAGS=-pipe -Os -arch x86_64' \
'LDFLAGS=-L/opt/local/lib -Wl,-headerpad_max_install_names \
-arch x86_64' 'CPPFLAGS=-I/opt/local/include' \
'CXX=/usr/bin/clang++' 'CXXFLAGS=-pipe -Os -arch x86_64 \
-stdlib=libc++'
CONFIGURE_PATH /opt/local/etc/ImageMagick-6/
COPYRIGHT Copyright (C) 1999-2014 ImageMagick Studio LLC
CPPFLAGS -I/opt/local/include/ImageMagick-6
CXX /usr/bin/clang++
CXXFLAGS -pipe -Os -arch x86_64 -stdlib=libc++ -D_THREAD_SAFE -pthread
DEFS -DHAVE_CONFIG_H
DELEGATES bzlib djvu mpeg fftw fontconfig freetype gslib jbig jng jpeg lcms \
lqr lzma openexr openjp2 pango png ps rsvg tiff webp wmf x xml zlib
DISTCHECK_CONFIG_FLAGS 'CC=/usr/bin/clang' 'CFLAGS=-pipe -Os -arch x86_64' \
'CPPFLAGS=-I/opt/local/include' 'CXX=/usr/bin/clang++' \
'LDFLAGS=-L/opt/local/lib -Wl,-headerpad_max_install_names \
-arch x86_64' --disable-deprecated --with-quantum-depth=16 \
--with-jemalloc=no --with-umem=no --with-autotrace=no \
--with-fpx=no --with-fontpath= --with-gs-font-dir=/opt/local/share/fonts/urw-fonts \
--with-perl=no
DOCUMENTATION_PATH /opt/local/share/doc/ImageMagick-6
EXEC-PREFIX /opt/local
EXECUTABLE_PATH /opt/local/bin
FEATURES DPC Modules
FILTER_PATH /opt/local/lib/ImageMagick-6.9.0/modules-Q16/filters
HOST x86_64-apple-darwin13.4.0
INCLUDE_PATH /opt/local/include/ImageMagick-6
LDFLAGS -L/opt/local/lib -L/opt/local/lib -Wl,-headerpad_max_install_names \
-arch x86_64 -L/opt/local/lib -L/opt/local/lib
LIB_VERSION 0x690
LIB_VERSION_NUMBER 6,9,0,0
LIBRARY_PATH /opt/local/lib/ImageMagick-6.9.0
LIBS -llcms2 -L/opt/local/lib -lfreetype -L/opt/local/lib -llqr-1 \
-lglib-2.0 -lintl -lfftw3 -L/opt/local/lib -lfontconfig -lfreetype \
-lXext -lSM -lICE -lX11 -lXt -L/opt/local/lib -llzma -lbz2 -lz \
-lltdl -lm
NAME ImageMagick
PCFLAGS -DMAGICKCORE_HDRI_ENABLE=0 -DMAGICKCORE_QUANTUM_DEPTH=16
PREFIX /opt/local
QuantumDepth 16
RELEASE_DATE 2014-12-06
SHARE_PATH /opt/local/share/ImageMagick-6
SHAREARCH_PATH /opt/local/lib/ImageMagick-6.9.0/config-Q16
SVN_REVISION 17068
TARGET_CPU x86_64
TARGET_OS darwin13.4.0
TARGET_VENDOR apple
VERSION 6.9.0
WEBSITE http://www.imagemagick.org
Path: [built-in]
Name Value
----------------------------------------------------------------------------
FEATURES
NAME ImageMagick
QuantumDepth 16