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DjVu conversion --> "No decode delegate for this image form"
Posted: 2009-12-23T05:23:57-07:00
by afatac
I am trying to convert a DjVu file to Jpeg image. The command line I used was
convert test1.djvu test2.jpg
However, I got this error message
convert: no decode delegate for this image format `test1.djvu' @ constitu
te.c/ReadImage/530.
convert: missing an image filename `test2.jpg' @ convert.c/ConvertImageCommand/2
838.
Can someone help?
Re: DjVu conversion --> "No decode delegate for this image form"
Posted: 2009-12-23T10:50:41-07:00
by fmw42
you likely need to install the DjVu delegate library and then recompile IM.
see
http://djvu.sourceforge.net/
after installing, then type
convert -list configure
and look at the line starting with DELEGATES and see if it is listed. Or
convert -list format
and see if it is listed in the image formats that IM recognizes.
Re: DjVu conversion --> "No decode delegate for this image form"
Posted: 2009-12-23T17:41:34-07:00
by afatac
Hi fmw42,
Thanks for the reply.
This is tough for me as I do not have programming knowledge.
after installing, then type
convert -list configure
and look at the line starting with DELEGATES and see if it is listed. Or
convert -list format
and see if it is listed in the image formats that IM recognizes.
For convert -list configure, it is not listed under DELEGATES. For convert -list format, this is what its shown
DJVU* DJVU --- Déjà vu
See
http://www.djvuzone.org/ for details about the DJVU format. The
DJVU 1.2 specification is available there and at
ftp://swrinde.nde.swri.edu/pub/djvu/documents/.
So I suppose the DjVu delegate library is not installed.
Re: DjVu conversion --> "No decode delegate for this image form"
Posted: 2009-12-23T18:28:45-07:00
by fmw42
For it to be installed, it would either need to show in the list of DELEGATES or convert -list format would need to show it as
DJVU* DJVU r-- Déjà vu
or
DJVU* DJVU rw- Déjà vu
r says that IM can read it and rw says it can read and write it
What version of IM are you using and on what platform? (convert -version)
Did you install from Binary or from Source?
The reason I ask is that on my Mac OSX IM 6.5.8-8 Q16, I don't even see DJVU* DJVU --- Déjà vu listed at all.
Re: DjVu conversion --> "No decode delegate for this image form"
Posted: 2009-12-23T19:16:27-07:00
by afatac
What version of IM are you using and on what platform? (convert -version)
Did you install from Binary or from Source?
Version: ImageMagick 6.5.8-5 2009-12-06 Q16
http://www.imagemagick.org
Copyright: Copyright (C) 1999-2009 ImageMagick Studio LLC
Features: OpenMP
I am using on Windows XP SP3 and it is installed from binary.
Instead of learning how to install the library and recomplie the source, I think I will try using IrfanView.