2. In the Edit screen below, click Drop frames button.
3. If you select [Delete similar images], the changes of total frames and play time will be shown.
The higher [Similarity Limit], the more frames will be deleted and the smaller the output file size will be. Higher [Similarity Limit] values, however, will make motions more unnatural. So Similarity Limit value has to be not too big or too small. From 20 to 30 is good value normally.
[Limit similar frame time] means the time limit per frame. You can enable this option when the movements are too unnatural due to removal of duplicate frames. The smaller value, however, makes movements more natural, the output file size will be bigger so you'd better keep this value more than 0.1 sec.
4. Jusk click Ok when it's done and Click Save button below!
The source video with 392 frames was saved as GIF with 244 frames. (GIF: 5MB, WebP: 1.8MB) If the source video is converted into GIF without any process, it's 10MB GIF with quality value 80.
Source video(392 frames)
The result(244 frames)
Please press Ctrl + F5 key or refresh browser if the two are out of sync.