https://bugs.freedesktop.org/show_bug.cgi?id=83253

          Priority: medium
            Bug ID: 83253
          Assignee: [email protected]
           Summary: EDITING: Inserting animated gifs does not work
                    correctly / consistently
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: [email protected]
          Hardware: Other
            Status: UNCONFIRMED
           Version: 4.3.0.4 release
         Component: Presentation
           Product: LibreOffice

I am experiencing a number of problems when I insert animated gifs into a slide
in a presentation. 

First, overall performance starts to slow down quickly, and at times adding
another animated gif, or sometimes just changing to a new slide (by clicking on
one in the slide pane) will freeze my entire system for several seconds,
sometimes 10s of seconds, including the mouse. 

Also, the image is usually inserted correctly (see screenshot 1), but often
(not always; it is intermittent) if I move to another slide, then back to the
slide with the inserted animated gif, it is no longer displayed and instead I
see an empty frame with a small icon and three periods at the top (see
screenshot 2). When this happens, the image is also not displayed during
slideshows, which means that showing animated gifs is completely broken for me,
because I cannot rely on them being shown correctly. 

These two issues seem to be related. If I have an animated gif showing
correctly, and I then add another to another slide, and there is no long freeze
to add the image, then the first image will still be displayed OK. But if I add
the second image (or change slides) and experience the several-second freeze, I
know that when I go back to the first slide, it sill not be displayed
correctly. In the second screenshot, I had to add several new gifs to get this
behavior to happen. You can see in screenshot 1 that I have images on 4 slides.
In screenshot 2, I added an image to slide 5, no problem, then 6, no problem,
then for slide 7, my system hung for about 8 seconds before adding that image.
Then, all of the 6 previous images showed a blank frame like in screenshot 2. 

One thing I notice is that in Powerpoint, animated gifs are shown as static
images in the editor, and are only animated during the slide show. This may
help with the performance issues I am experiencing. 

In addition to the screenshots, I have attached several animated gifs for
testing, along with the presentation file in the screenshots.

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