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Cover
=====
Usage: `cover()`
Description
-----------
This filter is used in GIFs to extract their first frame as the image to be used as cover.
.. note::
This filter will only function when ``USE_GIFSICLE_ENGINE`` are set to ``True`` in ``thumbor.conf``:
.. code:: python
USE_GIFSICLE_ENGINE = True
Arguments
---------
No arguments.
Example
-------
.. image:: images/animated.gif
:alt: Gif before cover filter
::
`http://localhost:8888/unsafe/filters:cover()/http://server.my/animated_static.gif`
.. image:: images/animated_static.gif
:alt: Gif after cover filter
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