On Nov 12, 2014 7:36 AM, "Andreas Leha" <andreas.leha@med.uni-goettingen.de> wrote:
>
> Hi Rainer,
>
> Rainer M Krug <Rainer@krugs.de> writes:
> > Andreas Leha <andreas.leha@med.uni-goettingen.de> writes:
> >
> >> Hi Marco,
> >>
> >> Marco Wahl <marcowahlsoft@gmail.com> writes:
> >>> Andreas Leha <andreas.leha@med.uni-goettingen.de> writes:
> >>>
> >>>> how would I export an org file containing
> >>>>
> >>>>   [[file:./myimage.pdf]]
> >>>>
> >>>> to html so that a say png version myimage.pdf is inlined in the html
> >>>> which links to the pdf?
> >>>>
> >>>> I guess it should be possible to run imagemagick on all pdf links during
> >>>> export somehow.
> >>>
> >>> You could introduce a relation of the pdf-filenames to the respective
> >>> thumb-filenames e.g. by using the suffix '_thumb'.  Before the export
> >>> the conversion tool would create the thumbs.
> >>>
> >>> The org-file could reference the data as
> >>>
> >>> [[file:./myimage.pdf][file:myimage_thumb.png]]
> >>>
> >>> See the info page (info "(org)Images in HTML export")?
> >>>
> >>> Untested.  I just accidentially browsed that info page yesterday.
> >>>
> >>>
> >>
> >> Thanks for your thoughts.  I would like to automate all of that.  So, I
> >> guess the first question is where to put code that would trigger the
> >> conversion and how to best detect links to pdfs.
> >
> > Well - this is coming again and again - but no solution out of the
> > box. There are effectively two approaches:
> >
> > 1) Macro to change properties according to backend used.
> >
> > One usage is changing the file name extension according to the
> > backend. This is implemented as a simplified macro below. This could
> > be done by using ~(by-backend (html "graph.png") (latex "graph.pdf") (t "graph.pdf"))~
> >
> > See [[http://orgmode.org/worg/org-contrib/babel/languages/ob-doc-LaTeX.html#sec-4-3][work section ob-doc-LaTeX]] for details.
> >
> > #+begin_src emacs-lisp
> >   (setq org-babel-latex-htlatex "htlatex")
> >   (defmacro rmk-by-backend (&rest body)
> >     `(case (if (boundp 'backend) (org-export-backend-name backend) nil) ,@body))
> > #+end_src
> >
> > 2) To use svg image format, which is supported by both (although has
> >    it's drawbacks: slow rendering of the html, need to run external programs upon compilation)
> >
> > So the first might be the modst feasible option.
> >
>
> Thanks for this.  I am aware of how to *produce* graphics in different
> formats for different export backends.  I use your first approach,
> which I think is the better solution.
>
> Here, I am after a solution, that works on images that are not produced
> but merely included via [[file:./some.pdf]].
>

If the names are always the same, could you just sed or replace-regexp all *.pdf for *.png?

Not elegant, but works easily/now, and takes less time than this thread :)

John

> I think there should be the possibility to include these into html (and
> odt) export without any user interaction.  So, I
> - do not want to write a source block just to produce the by-backend image
> - do not want to change the link manually
> - do not want to run the converter manually
>
> I am pretty sure this should be achievable with standard orgmode tools
> (like filters, export hooks, or anything).
>
> Since 'this is coming again and again' it seems a non-esoteric task.
> And as there is 'no solution out of the box', I assume(d) that somebody has
> written these filters already.
>
> Regards,
> Andreas
>
>