將其他動圖轉化爲AVIF動圖/Convert other animated images into AVIF animations

[sojuo]

希望能夠將其他格式的動圖，如Gif動圖和WebP動圖無損或有損轉化爲AVIF動圖。
I hope to provide the ability to losslessly or lossily convert animated images in other formats, such as GIF and WebP, into AVIF animated images.