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#1
09-11-2017, 22:10
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Why don't re packers use 7-Zip?
I'm just trying to figure our why all of you use FreeARC or ARC based compression nested of LZMA or LZMA2 (7Zip).
Doesn't ARC packing and unpacking use lot of RAM compared to LZMA ? According to the test done by TomsHardware the compression difference is very minor between ARC and LZMA. 
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#2
10-11-2017, 03:01
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Why don't you try compressing a game using lzma and fa? You will know the difference soon
Plus repackers use fa for applying other precompressors and preprocessors with lzma, not actually for fa compression.
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NOT AVAILABLE Last edited by 78372; 10-11-2017 at 03:39.
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#3
10-11-2017, 07:14
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GOG used Rar compression for a couple of games "small games" final station for example
everyone have their own way for compressing files everyone have every choice
__________________
learn it
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#4
10-11-2017, 10:23
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Quote:
__________________
Joe Forster/STA For more information, see the FileForums forum rules and the PC Games forum FAQ! Don't contact me via E-mail or PM to ask for help with anything other than patches (or software in general) done by me, otherwise your request may be deleted without any reply! Homepage: http://sta.c64.org, E-mail: [email protected]; for attachments, send compressed (ZIP or RAR) files only, otherwise your E-mail will bounce back!
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#5
10-11-2017, 10:40
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No they just apply some kind of basic compression one algorithm for everything and it's probably Rar
__________________
learn it
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#6
11-11-2017, 20:07
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Quote:
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#7
11-11-2017, 20:28
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Well here the trade is with ratio and unpacking time. For GTA V (as example), most of the people who use repacks won't mind to sacrifice an hour more on decompression for around 30GB gain.
__________________
NOT AVAILABLE
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#8
19-11-2017, 04:36
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Cause repackers are not coders, adding a compression algo in 7zip requires writing code and compiling it where as in fa, you can do that with arc.ini. And that's all
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78372 (19-11-2017) | ||
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#9
19-11-2017, 05:40
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and even if someone is willing then there are no documents available
but if you explore a bit you can do much more with 7zip, then you can ever think with arc
__________________
XD
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#10
19-11-2017, 09:15
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because lzma is inbuilt with unarc.dll so it can work and unpack faster , using an arc.ini file some bit slow unpacking hence some times repacker uses 7zip and many times uses on lzma. also cause incompatibility or crase in 7z.exe so it better to use lzma in ARC
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#11
19-02-2018, 06:58
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the difference can be huge when it comes to compressing "games" since "Freearc" uses a mix of different compressors (including lzma) to maximize the compression. That's why it uses more ram.
__________________
GG
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#12
21-02-2018, 08:37
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Download Nioh and try
Code:
lzma:512m:ultra:a1:mfbt4:fb273:mc100000:lc8:lp4:pb4 Code:
srep:m3f:a1+lzma:512m:ultra:a1:mfbt4:fb273:mc100000:lc8:lp4:pb4 you can even use 7z pipe to pipe in freearc this way Code:
7z a -txz -an -m1=lzma2{:option}:fb=273:mf=bt4:mc=100000000:lc=4:lp=0 -mmt=6 -mx9 -si -so <stdin> <stdout>
__________________
My projects : Masked Compression, lzma2(xz) on Freearc, Zstd compressor for windows My optimizations : packjpg.exe, zstd, lzham, precomp-dev-0.45. Last edited by Joe Forster/STA; 21-02-2018 at 11:25. Reason: turned settings into code (no smilies)
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