Hi all,
When I try to show inline images automatically resized in an org-mode buffer, the thumbnail doesn't show (a big blank box shows where the resized image should be) and the following errors are echoed in the "*Messages*" buffer.
```
ImageMagick error: no decode delegate for this image format `JPEG' @ error/constitute.c/ReadImage/504```
The image types I have tried are JPG and PNG.
When tried with a PNG file, the error message changes to
```
ImageMagick error: no decode delegate for this image format `PNG' @ error/constitute.c/ReadImage/504
```
* [Related settings]:
** init.el
`(setq org-image-actual-width nil)`
** the org-mode file
```
#+ATTR_LATEX: :width 300pt
[[file:20160802-142357_2016-08-02_13.35.28-1.jpg]]
```
I tried this with Emacs running in the safe mode, i.e. running with "-q" option.
The inline image shows correctly (with the original size) until I set `org-image-actual-width` to `nil`, after which I don't see the image in the buffer
(A big blank box appears where the image should be. I also see the errors mentioned above in the "*Messages*" buffer.).
* [Current workaround I use]:
It doesn't occur when I use the snippet in this SO answer.
It basically rewrites org-display-inline-images function.
* [Environmental information]:
** (i) I built my Emacs using the following tool:
by running `./build-emacs emacs-24.5`.
It was built with ImageMagick, and I can correctly export LaTeX formula with it.
Also it works fine when I don't use the resize feature, i.e. `org-image-actual-width` is set to `t`.
** (ii) Versions
*** Emacs: emacs-24.5.50.1
*** Mac OS X: El Capitan 10.11.6(15G31).
*** $ convert --version
Version: ImageMagick 6.9.5-1 Q16 x86_64 2016-07-15 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2016 ImageMagick Studio LLC
License: http://www.imagemagick.org/script/license.php
Features: Cipher DPC Modules
Delegates (built-in): bzlib freetype jng jpeg ltdl lzma png tiff webp xml zlib
Thank you very much in advance.
diadochos