need a good compression software

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need a good compression software

Post by hellfest29 on Fri Sep 04, 2009 6:46 am
([msg=29067]see need a good compression software[/msg])

i just came to see a 938 mb software compressed to 80 mb i looked around in google but no good cud sum1 pls suggest me sum good compression sofware other than winrar(not really god at all) winzip(worst) kgp archiver(took 28 hrs compressing my 2gb file saving about just 534 mb 7zip(not really that good) pls suggest me sum cood software thanx in advance :D
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Re: need a good compression software

Post by sanddbox on Fri Sep 04, 2009 9:57 am
([msg=29070]see Re: need a good compression software[/msg])

Technology doesn't exist and stop using annoying formats.
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Re: need a good compression software

Post by thedotmaster on Fri Sep 04, 2009 12:08 pm
([msg=29077]see Re: need a good compression software[/msg])

Gzipped Tarballs are personally my favourite. I've downloaded a 2MB file and extracted it to 50MB.
However it depends on the contents. Photos, for example, generally already have a lot of compression on them - so compressing them won't do much.
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Re: need a good compression software

Post by insomaniacal on Fri Sep 04, 2009 7:28 pm
([msg=29097]see Re: need a good compression software[/msg])

Indeed, it does depend on what you are compressing.

I remember there was a forum I frequented that had a 100mb limit, and people would frequently post gziped Tar's of Playstation Iso's. However, most of us soon found out that games with 2d graphics generally compressed much, much better than 3d ones.

So, basically, it all depends on what you are compressing.
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Re: need a good compression software

Post by hellfest29 on Sat Sep 05, 2009 5:58 am
([msg=29110]see Re: need a good compression software[/msg])

sanddbox wrote:Technology doesn't exist and stop using annoying formats.

if u dont belive it chk dis torrent download it itz norton av ,inet securty,and 360 itz a 86 mb compressed file and its format is exe ,...........u wont need any softwre to decompress it jus clk on it and it decompresses yo a 938 mb file
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Re: need a good compression software

Post by myhexhax on Sun Sep 06, 2009 11:41 pm
([msg=29206]see Re: need a good compression software[/msg])

tar cfz archive.tar.gz folder/
or
7zip

The compression ratio depends largely on what you're compressing.
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Re: need a good compression software

Post by fashizzlepop on Mon Sep 07, 2009 12:02 am
([msg=29207]see Re: need a good compression software[/msg])

Start fucking spelling your shit right!!!! Before I bust a nut! I will not help anyone who doesn't take the time to spell out "some!"

God have mercy on ya'll souls...
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Re: need a good compression software

Post by H1llzFr4D on Tue Sep 15, 2009 11:53 am
([msg=29696]see Re: need a good compression software[/msg])

Unfortunately there isnt the technology to compress 1GB to 100MB! Unless you use KGB, with which a guy I know compressed a 3GB file (GTA:SA ISO) at 1MB!!

Just use 7zip, Its the best and its free!
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Re: need a good compression software

Post by thedotmaster on Tue Sep 15, 2009 4:30 pm
([msg=29714]see Re: need a good compression software[/msg])

Take a text file containing 1000,000,000,000 letter 'a's and you could compress that to:
a*1000000000000
i.e. 15 bytes instead of 1GiB
I might have made a mistake in my calculations, but you get the idea.

However how many files are like that? Most are a combination of various characters, so they wouldn't be compressed so easily. And obviously, there are algorithms that are used to work out the best way to reduce file size, it's not as simple as that.
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Re: need a good compression software

Post by UtterNoob on Tue Sep 15, 2009 8:34 pm
([msg=29730]see Re: need a good compression software[/msg])

As another poster said, compression efficiency is directly related to the data being Compressed.

Here is an example. If you back up a "normal" SQL database (that doesn't contain a large number of binary blobs), that backup will usually compress 8-10:1. If you take that same backup and encrypt it, it will compress to 1.2:1 or less.

Why? compression depends on repeating patterns. Encryption depends on removing repeating patterns.

All of the above applies for Lossless Compression. Lossless compression allows you to restore a bit-precise copy of the original. Some applications allow an alternative mode of compression referred to as Lossy compression.

Lossy compression trades quality for smaller size. Several examples of this are common. Dig through your MP3 collection. Compare the sound quality and file size between a 96kbps and a 192kbps mp3. No MP3's? Open a picture from your digital camera in Gimp. Save it as a JPG with a 99% quality setting. Save it again with a 50% quality setting. Compare and contrast.

Personally I use tar+gzip for convenience/portability, and 7-zip for maximum performance.

HTH,
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