Animated Gif Combiner - Compression Help

In most cases, Gifsicle Compress will work best for file size, speed, and quality when combining animations.
Gifsicle Compress is used by default.

IM compress may remove duplicate frames but it's not very accurate and may actually increase the filesize.
In testing, it has created files 3x larger than Gifsicle compress in some cases!

I've provided a 3rd option using both methods which might remove duplicate frames and result in smaller files but the results are highly unpredictable and this option should only be used as a last resort.

Remember that these frame averaged animations contain many more frames than the original animation in most cases. This can result in huge file sizes.

There may be some animations which are not reasonable to merge. When we get above 600 frames, most browsers start to act up.
At 1000 frames, black areas may appear, the scroll bar may disappear, whiteouts may occur, and the browser may be come unusable until it's been closed and restarted.

If you've viewed a lot of complex animations or animations containing a large number of frames, you should clear your cache and restart your browser often.

In some cases, the resulting combined animations may have unusual color shifting. This is due to GD which is used to merge the frames.
Although Imagemagick has built in routines that will merge animations quite cleanly, it's not designed for production use and would take an unacceptable length of time to complete each merge operation.
Imagemagick is used as little as possible in this application due to it's ridiculous resource requirements and slow performance.

Gifsicle has been used extensively and even in ways that it's developer never intended. With a little trick math and a few custom functions that I've developed over the years, gifsicle was the only option for bringing this application into production for online use. Many thanks to Eddie Kohler for his continuing hard work to perfect gifsicle and add the functions we need to set the standards for the new decade.