APNGs created by ezgif.com aren't parsed correctly.

[evazion]

Looks like ffmpeg can't parse APNGs created by ezgif.com, which means we can't calculate the duration and they don't get tagged as animated_png.

$ ffmpeg -i bda86917466a1b1a5079b94728bb86ce.png -f null /dev/null
[apng @ 0x5bc2d4e83380] Could not find codec parameters for stream 0 (Video: apng, none, 720x720): unspecified pixel format
...
[apng @ 0x5bc2d4e83380] In-stream tag=ware (0x65726177) len=1399809652 is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.

https://danbooru.donmai.us/media_assets/20926313
https://danbooru.donmai.us/media_assets?search[metadata][File%3AFileType]=APNG&search[metadata][PNG:Software]=ezgif.com
https://danbooru.donmai.us/forum_topics/27310