On Saturday, 17 Jun 2017 at 14:54, Nicolas Goaziou wrote:

[...]

> According to `org-odt-convert-processes', `org-odt-convert-capabilities'
> and `org-odt-convert', isn't it already possible?

Indeed.  <blush>  Adding this

  (add-to-list 'org-odt-convert-processes '("gnumeric" "ssconvert %i %o"))
  (setq org-odt-convert-process "gnumeric")

is all that is needed.  As always, why am I surprised? :-)

Thanks.

-- 
: Eric S Fraga via Emacs 26.0.50, Org release_9.0.6-425-gf4fca1