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Flash software is vector, and the shapes and characters drawn directly in it are vector, which is one of the reasons why the file is small. Of course, flash can also import bitmaps, but bitmaps can be reused for animation and component conversion without increasing capacity. There are still only 1 bitmaps. But like bitmaps in frames, SWFs are quite large. If you import a video, that is, 1 frame and 1 picture, the file in swf format will be quite large. If you transmit a gif, it will be the same as a bitmap image, which is why the gif image will become larger.
So no matter how you use the software, the reason is the same. There are three factors to make a gif picture smaller: size, number of frames and number of colors. Among these three factors, reducing the border and size is the most effective way to lose weight, and reducing the number of colors can also be reduced, but it will affect the picture quality. .