Install apngdis by entering the following commands in the terminal:
sudo apt update sudo apt install apngdis
Description:
deconstruct APNG file into a sequence of PNG frames
Extract individual PNG files from animated PNG. . The Animated Portable Network Graphics (APNG) file format is an extension to the Portable Network Graphics (PNG) specification. It allows for animated PNG files that work similarly to animated GIF files, while retaining backward compatibility with non-animated PNG files and adding support for 8-bit transparency and 24-bit images.
Homepage: https://sourceforge.net/projects/apngdis
Version: 2.5-2
Section: universe/graphics