
also: transparent gifs tend to make the filesize bigger (since you can't use as many combined frames)
( ,
Tue 25 Sep 2007, 21:08,
archived)

not in this case specifically
combined frames can be useful if you have modifications in consecutive frames in different parts of the image, say:
if you're not using "." as a transparent color frame to can be optimized as
where o is transparent.
but if . is the transparent colour you need to store the whole of frame 2, and that's less efficient since a 3 1-colour blocks can be compressed a lot better than a whole frame.
( ,
Tue 25 Sep 2007, 22:01,
archived)
combined frames can be useful if you have modifications in consecutive frames in different parts of the image, say:
frame 1 frame 2
[.x...x.] [xx...xx]
[..x.x..] [..x.x..]
[...x...] [...x...]
[..x.x..] [..x.x..]
[.x...x.] [xx...xx]
if you're not using "." as a transparent color frame to can be optimized as
frame 1 frame 2
[.x...x.] [xooooox]
[..x.x..] [ooooooo]
[...x...] [ooooooo]
[..x.x..] [ooooooo]
[.x...x.] [xooooox]
where o is transparent.
but if . is the transparent colour you need to store the whole of frame 2, and that's less efficient since a 3 1-colour blocks can be compressed a lot better than a whole frame.