Ihor Radchenko <yantar92@gmail.com> writes:

> "Christopher M. Miles" <numbchild@gmail.com> writes:
>
>>> Here is the prototype code which displaying image with text-property:
>>>
>>> #+begin_src emacs-lisp
>>> (put-text-property start end
>>>                    'display (create-image thumbnail nil nil :ascent 'center :max-height thumbnail-size))
>>> #+end_src
>>>
>>> - If this is some kind of internal mechanism of Emacs, can someone explain why?
>>>
>>> - If have some method to remove those horizontal lines. How to do it?
>
> Could you please detail the steps required to reproduce the problem,
> starting from emacs -Q?

Additional info: The package "org-link-beautify" generating video
thumbnails require external command-line tools, you maybe need to
install it depend on your system platform. More details you can check
the package source code: https://repo.or.cz/org-link-beautify.git

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