what is difference between xZLib & xLZ4 & xLZO & xZSTD & xCriLayla ?

amin fear · #1 17-02-2021, 23:33

what is difference between xZLib & xLZ4 & xLZO & xZSTD & xCriLayla ?
which one gives "better-general" compression results ?

Masquerade · #2 18-02-2021, 00:35

All that you have listed are different pre-compression methods, not actual data compressors.

These are XTool methods, and you must use the right one for your data.

A simple example: Unreal Engine 4 games pak files are compressed with zlib so, you can use XZlib to reinflate the pak file before srep+lzma, srep+lolz etc...

.CPK files are Crilayla files.

In Devil May Cry 5, you need to use both xzlib and xzstd since the game is packed with deflate and zstd.

So to sum things up, use the precompressor that's correct for your data.

biotec2k8 · #3 18-02-2021, 03:40

It's a science in itself. You have to know what can be packed and how.

There is some data that is already packed. You have to know or find out how they are prepackaged. These can then be unpacked again and can finally be compressed better with a packer.

It is important to know what you can pack with what. And which packer works and how.

Bzip and Gzip are used a lot. So these types can be "unpacked" again. And this "raw data" can then be packed better again.

Certain games then have their own formats, which have to be processed accordingly with other programs so that they can be compressed effectively.

I have been dealing with this matter for a while now and am also trying to find out what can be implemented and how.

It would be great if you could do a tutorial here on the board to show us how something can be done there.

biotec2k8 · #4 18-02-2021, 03:53

What I've found out so far is this:

Reflate + Srep + Delta + nz

This combination gives a very good result. However, it also takes a lot of time. Reflate and nz aren't the fastest. But the result is very good.

Ele · #5 18-02-2021, 07:27

Quote:

Originally Posted by biotec2k8

What I've found out so far is this:

Reflate + Srep + Delta + nz

This combination gives a very good result. However, it also takes a lot of time. Reflate and nz aren't the fastest. But the result is very good.

why Delta?

biotec2k8 · #6 18-02-2021, 12:38

Mh. Good question. In my Tiny Tool Compressor GUI everything that is listed there is combined with Delta or xDelta3.

Isn't that what you really need?

I like to learn something about it.

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