hi,
how did some ppl manage to compress a lot of data files totalling around 18mb into a small 2mb rar file? :blink:
...also, the decompression was amazingly faster than a .cab file :ohmy:
where can i get that program?
thx,
gildan2020
Printable View
hi,
how did some ppl manage to compress a lot of data files totalling around 18mb into a small 2mb rar file? :blink:
...also, the decompression was amazingly faster than a .cab file :ohmy:
where can i get that program?
thx,
gildan2020
hey, winrar is performing greatQuote:
Originally Posted by Livy
thx,
gildan2020
i also use winace, http://www.winace.com which is pretty good.
I use IZArc decompresses over 30 formats including .rar,.zip,7zip etc. Compresses to 11 different formats including .zip, 7zip (my fav), .tar etc. And it's freeware. :01:
hmm...after much testing with rar
it still eludes me as to how some ppl can compress 18mb into just a meagre 2mb rar.
The best i can do with winrar is just 5mb using the best compression (it provides, afaik)
i know ace/7zip/cab have reputation of performing good compression (when compared with zip), but this rar file is amazingly small (and they're mostly binary data).
gildan2020
binary data will not compress very well. try compressing some text with these tools and i bet it will show better results.
i did a few tests with diff compressions (zip rar ace cab)
also tested them on lots of diff file formats
.CAB came out ontop for som reason
7zip is real good
havent tested it against .cab tho
wat did u use to create .cab archives?Quote:
Originally Posted by Fiber
gildan2020
winace can do it
it suprised me
because it pressed better then .ace in most cases :S
ok i did another test
i used the 4 biggest .files in my office 2003 folder
winword.exe (12,037,688 bytes)
excel.exe (10,073,144 bytes)
fpeditax.dll (6,600,256 bytes)
frontpg.exe (4,425,272 bytes)
.CAB (13,219,941 bytes)
.RAR (13,403,861 bytes) ,solid
.ACE (13,519,624 bytes) ,solid , 4megs dictionary
.7zip (11,444,156 bytes) ,solid, 256meg dict, PPMd
winner: .7zip
but u will need at least 256 mb of RAM to unpack it LOL
added: results will vary depending on the coding of file u are pressing
so dont take results to heart TOO much
altho i have never seen .RAR beat .CAB yet
WinRAR in any case.
Uhrc or whatever its called, thats what rip scene groups use to compact stuff like Simpsons Hit And Run from 1.2Gb down to 126mb.
i thought scene groups use rars?
rar might not be able to defeat cab in terms of compression (a tight competition if referring to Fiber's test), but i think in terms of decompression speed rar still wins.
gildan2020
Yes scene groups use rar, scene rip groups use Uhrc (Sp), these are the groups that rip say the music then privide the games for 56k and slow net users. They are usually 50mb-300mb and extracted to anywhere between 700mb-2gb.Quote:
Originally Posted by gildan2020
try using 7zip, LZMA, solid, dict. 12MB, word 255. it'll be even smaller ;)Quote:
Originally Posted by Fiber
Quote:
Originally Posted by zapjb
:01: Yeah! :01:
IZArc owns all!!!
And it's free :cool:
http://www.izsoft.dir.bg/
wow never knew LZMA would be smallerQuote:
Originally Posted by nsane
i will do a retest later
7zip is free tooQuote:
IZArc owns all!!!
And it's free
and im sure it owns IZArc (i will test it now)
go do a test
http://www.7-zip.org/
IZArc is good
but its a rip off of 7zip (just an unconfigurable version)
and has usless compressions
i think UHARC is the shit. but the GUI mite b a problem
yepQuote:
Originally Posted by nsane
LZMA beat PPMD
1.2 gigs to 126 megs...I doubt it. You sure it wasn't a rip?Quote:
Originally Posted by Peerzy
The Simpsons Hit And Run was about 150mb and extracted to just over 1.3 gb. It was a rip as the full game was 1.6gb. So they ripped out 400mb and used ultra compression. Same with command and conqure Generals. That was 100mb and extracted to over 1gb.Quote:
Originally Posted by Tifosi
Ah, right. I got the ISOs so I didn't hear about the ripQuote:
Originally Posted by Peerzy
Quote:
Originally Posted by Peerzy
yea it confused me for the first time too,i downloaded the rip and it was working fine!i think they used uharc 4 it!
even i have compressed 1gb to 100-150mb using winrar.
Note:i have noticed this high compression in save games only....Tested:Doom 3,half-life 2,sw:kotor,and many more......
i save the game every few seconds and this games have a small screen stored which takes some space,its compressed i thik so and the main thing is the save file if u see its properties(in xp,2000)u'll see the original disc space and the size on disc thing(its always more).here winrar takes the lead it atleast compress the files and bring its size somewhat to the original size.and sometimes less the we even expect it ;)
uharc is one hell of a media compressor. i compressed 3gigs of wav files down to 250MB one time, was testing it with some CDrips just for the hell of it :P
i think it proved itself tho :lol:
i remember good old uharc
i remember unpacking C&C:RA2 with it back in the days
http://www.softpedia.com/get/Compres...y-Brhack.shtml
nice GUI version is availible now
i tested with my files i pressed be4
12,342,839
it came 2nd place
altho as nsane spoke about, its better for media orientated data
that's actually what it was specificly devoloped for ;)
i guess the algorithms would make an ok data compressor, but i never tried it. i've found RAR, LZMA, & ZIP to be the better data compressors right now. LZMA & RAR are good for raw data, but suck if the data's packed due to the fact the algorithms cause them to expand the packed data rather than compress it further. ZIP is better to use if the data is already packed, because it won't expand the packed data, but rather just leaves it alone because it's already packed/compressed. so really, it comes down to what your trying to compress when you choose an algorithm, as there's different algorithms designed specificly to compress certain types of data ;)
i actually read an article on CNet once about a guy that's designing an algorithm, if you call it that, that looks at the binary value, 100111011, of a file (or groups of files, such as a folder) and determines a mathmaticle equation that will produce the sum of the binary value. basicly, when he's done, you'll be able to 'compress' gigs down to BYTES. imagin what that technology would do for file sharers. hell if you used a similar technology for streaming media, there would be no need for broadband and dsl. hell, you wouldn't even need a 56K for that matter, you'd download a mathmaticle equation that produces a 40gig blu-ray image in seconds on an old 34K modem :lol:
really? wow...interesting
u still know where the article is?
gildan2020
sounds too good to be true
imagin it!
forget CDs i got DOOM3 on a floppy disc
any way im gonna do a test to find out what the best compressor is for what file formats
like
.wav
.roms (yea rom files)
.jpg
.blah blah blah
i wish they would come up with an easier program that users u-harc. I tried it once but the interface was too confusing.. although i didnt mess with it very long.