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-   -   LZ4 MOD for *certain* game's data archives | repacks (https://fileforums.com/showthread.php?t=99980)

FitGirl 07-08-2021 15:53

Quote:

Originally Posted by L33THAK0R (Post 493588)
Rats! I hadn't considered that, that begs the question how ztool was used in the repacks I mentioned to be able to pack these streams. It'll definitely be interesting to see if anyones able to figure this one out, but given how niche this hobby is, and more niche still with console game-data compression, I think this might just remain a mystery for a while longer!

It means those streams were picked up by detector wrongfully and it generated some delta for restoring non-existing streams. I bet packing the game w/o LZ4 precompression will give better result than with it.

Headerless LZ4s are very hard to detect, so many false streams are found. They even decompress, but are not real streams :)

Razor would tell you a whole book of such stories.

L33THAK0R 07-08-2021 20:00

Quote:

Originally Posted by FitGirl (Post 493595)
It means those streams were picked up by detector wrongfully and it generated some delta for restoring non-existing streams.

Alright I think I understand the gist of this, I didn't realise this could happen, its quite interesting honestly.

Quote:

Originally Posted by FitGirl (Post 493595)
I bet packing the game w/o LZ4 precompression will give better result than with it.

I hope I'll be able to figure out how to squash the main data-files down, since it seems the title can be compressed a considerable amount.

Quote:

Originally Posted by FitGirl (Post 493595)
Headerless LZ4s are very hard to detect, so many false streams are found. They even decompress, but are not real streams :)

Thankfully I'm yet to encounter many titles that use this algorithm, fingers crossed one day I'll be equipped to handle such a monster!


Quote:

Originally Posted by FitGirl (Post 493595)
Razor would tell you a whole book of such stories.

If he ever comes back, I'd honestly love to hear more about this


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