CorePack Compression methods ? Help

[RamiroCruzo]

Originally Posted by panker1992

dont forget that srep delta and lzma are all based on lz77 matchfinding architecture

At last, someone with knowledge worth to talk...Haha..

You hope to replace every reoccurrence firstly and then again try to do so and hope it will be smaller...LOL...It's Common Sense of Humanity Missus....

[FitGirl]

[QUOTE=panker1992]Srep can indirectly show if delta is good or not, anything srep's ratio can go below 70 or 65% then delta helps./QUOTE]
Not corrensponds to my tests at all. Especially bad delta behaves on different textures data. As SREP is just a simple LZ77 with extra-large dictionary, it can't say if the data consists of binary tables or not.

In my brute-forcing sctipts is always one of the steps, but as i said above, it rarely gives any benefit, but makes compression worst in much more cases.

Mad Max is a good example. It hase astonoshing srep removal rate, but using delta will hurt the compression ratio due to lots of textures inside.

[Razor12911]

Originally Posted by FitGirl

Well, I hope they won't remove my "delta thoughts", cause this is too real

Nah, it's not that it's just that back in the days, you mentioned a warez group, you got a warning or the thread is closed, or banned. Things change I guess.

Originally Posted by RamiroCruzo

Hey Razor bro, whats up?

The sky?

[Chayan Manna]

Corepacks Just use a modified Version of Precomp. They Use Precomp+Srep64+Lzma64.

[Razor12911]

Originally Posted by Chayan Manna

Corepacks Just use a modified Version of Precomp. They Use Precomp+Srep64+Lzma64.

Modified precomp? :v since when they know how to program?

[aswadd]

Originally Posted by Razor12911

Modified precomp? :v since when they know how to program?

Razor I'd like to ask you because i saw a Zlib1.dll which is around 50 kb , the one we use is around 100 KB I found it in SYter Repacks so any difference ??
Updated
the same as FitGirl the both are using Zlib1.dll with precomp038 which is 59 KB Those 2 Guys are using same methods / tools almost the same
updated
Same as precomp 321KB , original ~600kb less size than usual so is they using a modified version or they are basically compressing it ??
updated
also precomop043
original size 1.015 KB the one they are using is 1.160 KB now i don't think they compressed the files I'm not sure about it's modified or not But maybe i'll do some speed tests

[Razor12911]

-Razor I'd like to ask you because i saw a Zlib1.dll which is around 50 kb , the one we use is around 100 KB I found it in SYter Repacks so any difference ??

Well zlib1.dll is a library older versions of precomp used, precomp038-042, basically all precomp executables less than 500kb in size, if more than, it means zlib library is compiled along with exe.

-zlib1.dll as well, 59kb and 100kb, same difference, the 100kb is the latest, I grabbed it from zlib site, there definitely is a reason for the update, so why not grab it, initially it was 59kb zlib1.dll.
the same as FitGirl the both are using Zlib1.dll with precomp038 which is 59 KB Those 2 Guys are using same methods / tools almost the same

the usage of different zlib1.dll doesn't improve compression, plus a lot of people include the library even when its not used, once precomp.exe is more than 500kb or rather 800kb to be safe, it means the exe comes with compiled zlib functions.

-Same as precomp 321KB , original ~600kb less size than usual so is they using a modified version or they are basically compressing it ??

-_-, ever heard of different zlib versions? 321kb is bascially precomp0.38 that uses zlib1.dll.

-also precomop043

1.015 KB is original size, 1.160 KB version contains cls patch that allows for cls-precomp.dll to be able to show progress when decompressing, without patch, either you don't get progress of extraction or cls fails, this patch is made available to every one, it's made by ProFrager.

[Razor12911]

just ran a benchmark:

precomp038 (321 KB) with zlib1.dll (58.5 KB): 82.3 MB (86*347*072 bytes) > 373 MB (391*155*058 bytes) took 151906 ms
precomp038 (321 KB) with zlib1.dll (105 KB): 82.3 MB (86*347*072 bytes) > 373 MB (391*155*058 bytes) took 143078 ms
precomp038 (1.23 MB): 82.3 MB (86*347*072 bytes) > 373 MB (391*155*058 bytes) took 166093 ms

Same output size, zlib1.dll (58.5 KB) is version 1.2.3, zlib1.dll (105 KB) is version 1.2.8, there definitely is a reason for updates.

[aswadd]

Originally Posted by Razor12911

just ran a benchmark:

precomp038 (321 KB) with zlib1.dll (58.5 KB): 82.3 MB (86*347*072 bytes) > 373 MB (391*155*058 bytes) took 151906 ms
precomp038 (321 KB) with zlib1.dll (105 KB): 82.3 MB (86*347*072 bytes) > 373 MB (391*155*058 bytes) took 143078 ms
precomp038 (1.23 MB): 82.3 MB (86*347*072 bytes) > 373 MB (391*155*058 bytes) took 166093 ms

Same output size, zlib1.dll (58.5 KB) is version 1.2.3, zlib1.dll (105 KB) is version 1.2.8, there definitely is a reason for updates.

yes you are right , also decompression is the almost same time

[aswadd]

But why fitgirl or syter is using such an old thing ?? I don't think they don't know about Zlib1 updates !! there must be something else Baby yes Baby no :v BTW thnx for ur quick replay Razor ^_^

[Bulat]

delta isn't lz, it's more like multimedia preprocessors like mm in freearc and delta in 7-zip

http://encode.ru/threads/1045-Delta-...s-preprocessor

it's advantageous on binary data such as executables, databases, mail archives, but probably bad on multimedia data like those textures

[Blade2239]

What's best thing to compress texture files like .dds (without losing quality) and wav audio files files too....

[gozarck]

Hello Blade2239.
Do you was tried MSC?

[Blade2239]

Originally Posted by gozarck

Hello Blade2239.
Do you was tried MSC?

Hi gozrack
No didn't tried it is it like Perugino or what means it's an additional file or like comes with any compressor

[edward99]

why do they compress better
because they delete useless files that's why they compress better