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http://giflib.sourceforge.net/whatsinagif/index.html http://giflib.sourceforge.net/whatsinagif/bits_and_bytes.html https://gif.ski/ gifski 可以从视频生成高质量的 gif 浓缩的才是精华：浅析 GIF 格式图片的存储和压缩 https://cloud.tencent.com/developer/article/1004763 用av1视频替代 gif https://www.singhkays.com/blog/its-time-replace-gifs-with-av1-video “Replace animated GIFs with video for faster page loads” : https://web.dev/replace-gifs-with-videos/ https://web.dev/efficient-animated-content/ http://blog.pkh.me/p/21-high-quality-gif-with-ffmpeg.html 每帧一个调色板，就可以消除噪点。 https://medium.com/@Peter_UXer/small-sized-and-beautiful-gifs-with-ffmpeg-25c5082ed733