At present, the best way to achieve high quality is kmplayer+Gif movie gear. First, open the video in kmplayer, and press Ctrl+G to capture continuously. The format is bmp, and the number of frames is * * * 10 second, with 5 frames per second. After getting this pile of bmp, open gif movie gear, edit-parameter settings, palette, select "Shake when mapping colors" at the bottom, insert a frame after confirmation, select the top pile of bmp (be careful to select it before opening it last time), and play it to see the effect. If there are too many frames, you can reduce one frame every two frames under the animation reduction volume, then click Optimize Animation on the toolbar and finally save it.

Of course, this is not the highest quality animation method. The highest quality animation is apng format, which can completely maintain the original image quality, but it requires a browser. You can look for it yourself if you are interested.