However, the Animated Portable Network Graphics format includes three additional types of information blocks (chunks) that describe the animation and provide additional frame data.
An application program that supports PNG (but not APNG) is still able to play an APNG file, but in this case, just a single image can be seen, not the complete animation.įrom a technical point of view, the APNG data stream largely corresponds to the standard PNG data stream whose structure can be found in the official image format specifications. Although APNG does not count as an official PNG extension, it is backward compatible to the basic format.
