Binary package “gif2apng” in ubuntu trusty
tool for converting animated GIF images to APNG format
This progrmam provides a command line tool for converting images from
animated GIF to Animated PNG format.
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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.