https://bugs.kde.org/show_bug.cgi?id=395265

vanyossi <ghe...@gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |ghe...@gmail.com

--- Comment #2 from vanyossi <ghe...@gmail.com> ---
That is a limitation on gif decoders, most won't playback at more than 50fps!
You can see the behaviour here
https://web.archive.org/web/20170201034945/http://blog.fenrir-inc.com/us/2012/02/theyre-different-how-to-match-the-animation-rate-of-gif-files-accross-browsers.html

My suggestion would be to render the frames to images and apply a more complex
ffmpeg filter. If all you want is double the speed render the animation frames
as images and try:

Create a palette
ffmpeg -r 60 -start_number 0 -i myanim_%04d.png -vf palettegen -y mypalette.png

Make gif
ffmpeg -r 60 -i myanim_%04d.png -i mypalette.png  -lavfi
"fps=30[x];[x][1:v]paletteuse" -y output.gif

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