## p1ng (Forensics, 121p)
###ENG[PL](#pl-version)
We are given interesting file, that looks like regular png file.
![](p1ng.png)
Though your browser may or may not support it. Because (surprise!) it's not regular png file - it's so called APNG file (animated png). After we discovered it (using tweakpng) we tried to unpack all the frames with available tools. Unfortunately, no ready-to-use program was able to unpack this image (i'm not sure why). So we hacked something in PHP, using stackoverflow of course:
```php