apngr - simple APNG multitool

apngr provides the ability to:

• Combine multiple PNGs into a single APNG via animate
• Extract frames from an APNG via extract
• Query frame data from an APNG via query
• Convert a GIF into an APNG via convert

It primarily exists as a means for testing kettek/apng and has not been used for much beyond ensuring apng's functionality.

Notes

It currently lacks support for converting disparate PNG images -- whether in size or image format -- however this will be addressed in the future either directly in the kettek/apng package or in this utility.