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when I view png images in Dired-mode there is no problem but when I try to view the thumbnail of it (C-t d), it fails and throws this error: could not create thumb of <filename>.

M-: of dynamic-library-alist returns these lists: 

((xpm "libxpm.dll" "xpm4.dll" "libXpm-nox4.dll") (png "libpng16.dll" "libpng16-16.dll") (tiff "libtiff-5.dll" "libtiff3.dll" "libtiff.dll") (jpeg "libjpeg-9.dll") (gif "libgif-7.dll") (svg "librsvg-2-2.dll") (gdk-pixbuf "libgdk_pixbuf-2.0-0.dll") (glib "libglib-2.0-0.dll") (gobject "libgobject-2.0-0.dll") (gnutls "libgnutls-28.dll" "libgnutls-26.dll") (libxml2 "libxml2-2.dll" "libxml2.dll") (zlib "zlib1.dll" "libz-1.dll"))

What fundamental point am I missing?

Notes:

  • Windows 7 32 bit
  • Emacs 24.4
doctorate
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    Could it be you haven't got `imagemagick` installed? IIRC the thumbnails are created with the `convert` command it provides. – wasamasa Jan 12 '15 at 10:26
  • @wasamasa is it a requirement? I will try to install it now but what do I need to make emacs aware of it on Winodws machine? apart from adding it to path variables – doctorate Jan 12 '15 at 10:34
  • According to `image-dired.el` the `imagemagick` software is indeed a requirement since it needs its `convert` and `mogrify` executables. Therefore, install it, extend `PATH` if necessary and make sure you can invoke the commands in a shell, then it should work in any subsequent Emacs session. – wasamasa Jan 12 '15 at 10:38
  • yep, it worked well. Feel free to answer this post for the benefit of future users as well. – doctorate Jan 12 '15 at 10:45
  • Good, did that. – wasamasa Jan 12 '15 at 10:55

1 Answers1

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While most issues with images in Emacs on Microsoft Windows are caused by missing shared libraries, this one is the fault of missing executables. image-dired requires the image-magick software which provides (among others) the convert and mogrify executables. Installing it and modifying PATH to allow you to launch these in a terminal should do the trick, any subsequent Emacs session will then be able to display thumbnails in dired for you.

wasamasa
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  • I noticed also by installation of imagemagick it offers a default option to add binary folder of executables to your path so that you don't need to add it manually by yoruself. – doctorate Jan 12 '15 at 11:06