/kemono/ - kemono.party

Bumping again

Admin said a few weeks ago he looked at this and the images as originally uploaded are just a broken mess. He's mostly amazed that Patreon somehow manages to display them correctly.

My guess would be you need a custom tool to fix them up.

So there is no way to fix them then? damn unfortunate as heck.

More than half of the contents of any of his broken files is what's looking like a zip bomb packed into zip-compressed description field. When we get to the image data stream, there is whatever is on the screenshot. It's quite literally designed to crash one half of the png parsers and halt the other before the actual data stream comes.

My current hypothesis is that these are some maliciously crafted files designed to work with and only with a library Patreon uses to generate previews.

Also, he tells us to SUCK. (recurrent thing among all the files i tried)

will someone fresh reimporting fix this

It's fixable, personally I just used Notepad++ with a hex editor plugin, but any text editor with a hex editor should work, just delete all the chunks before the IHDR chunk if there are some, don't delete the PNG header though, those between the IHDR chunk and the first IDAT chunk, note that the chunk actually starts 4 characters before the chunk name, those between the 1st and 2nd IDAT chunks, and then change the part of the 2nd IDAT chunk that indicates the chunk length with the Hex editor, which is the previously mentioned 4 character before the chunk name, after this 2nd IDAT chunk there is only the IEND chunk, from that you can get the length of the IDAT chunk and then convert it to hex, can be done with the Windows calculator in programmer mode, and use the hex editor to actually write the hex length on the length part of the IDAT chunk.
There's no need to keep reimport this guy's gallery every 2 days, every image seems to be recoverable from what I tested, though he somewhat changes what he does time to time, like, older imports with <8 MB files are recoverable from using the compress to die corrupted png tool, and some even older images actually open on the standard Windows image software, but not on browser.

>>54757
Genius, thanks. The whole process got old fast so I just made a pythons script to automate it. Only thing is the blaze drummer set came out with some weird inverted colors, but everything else I tried seemed fine.