de.cerus.jgif.GifImage#setFramerate should accept a float as argument not an int.

Its not possible to set some non round framerates. Such as 29.97 frames per second for example. The library you use under the hood accepts a float for this parameter. Please change it from int to float.

Start at de.cerus.jgif.GifImage#setFramerate and inspect how its argument is passed to the underlying animated GIF library. Confirm that fractional values such as 29.97 are accepted and check any callers or tests available; done means non-round framerates can be supplied without conversion to an integer.

Written by the indexing model from the issue text.