CorePack Compression methods ? Help
 

CorePack Compression methods ? Help:confused:

I don't see anything strange in corepack !! they Just are clever in ripping unnecessary files or language files , other thing they are using normal methods :)

As he said, they are very clever in ripping useless stuffs, I remember them ripping Multiplayer out of CoD: Advanced Warfare which no other repack teams could do at that time, same they did with DOOM. BTW, is this forum just about knowing and copying other groups methods ?

Here you can find all about compressing [tools , methods , precompressors ,] not only other groups methods :D

Corepack is one of the oldest repacking team in the repacking field and by the time they know exacty which files should be ripped.....like the best thing is that they replace the game intros by their corepack intro or they just re-encode it...............but fitgirl....hmmm you know

What ? they don't put their logos now, it was in the past but now they don't put their logos.

Typical Corepack string looks like this, afair:

srep+delta+lzma:177mb:fb273:lc8

It's generic and well-known, aside of using delta, which should never be used by default, as it make compression worse in 90% of cases, make it slightly better in 8% of cases and only in 2% of cases gives noticeable compression gain with LZMA. These numbers based on my huge bruteforcing database I build through my repacking.

I told about it to Shiv in the beginning of 2015, but he doesn't like to learn, so the delta is still in there.

So if you copied your compression string with delta from someone else - get rid of it and never use blindly. Delta is a very specific byte-mixing filter, which can help only with certain types of data.

And yes, as stated above, CP's "records" are build on ripping data, not on actual compression.

what do you mean by worse ?? do you mean compression ratio or speed of de/compressing ??

Pffff, you hate CorePack, just say that directly.

Me too :D , I don't know what is the reason but i don't like them :( Maybe 1 year ago I download a 20 GB repack & what it was corrupted !! As for someone from EGYPT to download 20 GB is taking about 7 days X 15 hour Downloading

Hehe, moderators nowadays are too lenient it's even funny.

Compression ratio only. De(compression) is almost the same, this operation is not mathematically heavy.

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

Hmm...Hmmm...Delta isn't some usual brute force compressor, it detects data tables and minimizes them. Well, in simple words, eliminate repetitions of data. This is an old benchmark from Delta libraries, hope you find it intriguing...

Orginal File = 601 MB (630.408.442 bytes)

CCMX 6 = 282 MB (296.109.161 bytes)
DEL + CCMX 6 = 284 MB (298.355.666 bytes)

RZM = 321 MB (337.587.110 bytes)
DEL + RZM = 309 MB (324.613.378 bytes)

REP + RZM = 321 MB (337.189.036 bytes)
DEL + REP + RZM = 309 MB (324.184.644 bytes)

Hey Razor bro, whats up? :D:D:D

Srep can indirectly show if delta is good or not, anything srep's ratio can go below 70 or 65% then delta helps.

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

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....

[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.

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.

The sky?

Got it !
 

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

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 ?? :D
Updated
the same as FitGirl the both are using Zlib1.dll with precomp038 which is 59 KB :D 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 :D 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 :D

-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.

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

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 :D Baby yes Baby no :v BTW thnx for ur quick replay Razor ^_^

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

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

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

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

Like crunch texture.......?????
And how it deletes the files means how it know which files is useless

bro such as all languages but English
multiplayer if it has

Sorry my fault.
They uses 1.160 KB version of Precomp which contains cls patch but with brute.

Yeah that's true CorePack messed up with GTA V badly too... i wasted 27 GB of data.. lol

Necro...

Btw, if you haven't noticed yet