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  #1  
Old 09-09-2016, 23:01
ramazan19833 ramazan19833 is offline
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Thumbs down CorePack Compression methods ? Help

CorePack Compression methods ? Help
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  #2  
Old 09-09-2016, 23:55
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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
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Old 10-09-2016, 02:36
zoroX zoroX is offline
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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 ?
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Old 10-09-2016, 03:14
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Quote:
Originally Posted by zoroX View Post
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
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Old 10-09-2016, 06:30
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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
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Old 10-09-2016, 09:33
zoroX zoroX is offline
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Quote:
Originally Posted by -RAGE- View Post
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.
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Old 10-09-2016, 09:56
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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.
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Old 10-09-2016, 10:49
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Quote:
Originally Posted by FitGirl View Post
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 ??
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Old 10-09-2016, 12:15
zoroX zoroX is offline
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Quote:
Originally Posted by FitGirl View Post
And yes, as stated above, CP's "records" are build on ripping data, not on actual compression.
Pffff, you hate CorePack, just say that directly.
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Old 10-09-2016, 12:38
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Quote:
Originally Posted by zoroX View Post
Pffff, you hate CorePack, just say that directly.
Me too , 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
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Old 10-09-2016, 12:42
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Hehe, moderators nowadays are too lenient it's even funny.
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Old 10-09-2016, 13:15
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Quote:
Originally Posted by aswadd View Post
what do you mean by worse ?? do you mean compression ratio or speed of de/compressing ??
Compression ratio only. De(compression) is almost the same, this operation is not mathematically heavy.
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Old 10-09-2016, 13:16
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Originally Posted by Razor12911 View Post
Hehe, moderators nowadays are too lenient it's even funny.
Well, I hope they won't remove my "delta thoughts", cause this is too real
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Old 10-09-2016, 20:07
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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?
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Old 10-09-2016, 20:29
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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
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