Highly Compressing a file

[NitrousNavneet]

I want to compress my file
Winzip , 7-zip etc are not compresses file enough .
I want to convert my 7.5gb file into 4.7 gb.

[krishnandu.sarkar]

Try UHARC

[NitrousNavneet]

Are you telling about it:-
Download UHARC for Windows (free)

[krishnandu.sarkar]

Yeah, WinUHA - UHARC GUI - High Compression Multimedia Archiver

Specifically http://www.klaimsoft.com/winuha/download.php

[NitrousNavneet]

Ok
I will test it

[krishnandu.sarkar]

BTW it depends on what file you are trying to compress. Not everything get better compression ratio.

Like I compressed one 8GB SQL Server backup file to mere 48MB with WinRAR.

[sygeek]

Try compressing into tar.gz.

[jsjs]

I tried compressing some images and they got reduced by some MBs only

[Zangetsu]

Originally Posted by krishnandu.sarkar

BTW it depends on what file you are trying to compress. Not everything get better compression ratio.

Like I compressed one 8GB SQL Server backup file to mere 48MB with WinRAR.

sql db backup file are compressed highly in winrar...


@NitrousNavneet: winuha is high compressor or u can also try kgb archiver...
but the problem with kgb is it takes lot of time & depends upon system config

[abhinav_sinha]

I have a question though about the compression ratio. Some time I get as much compression as 50-60% and some times just about 2-3%. Ex-I compressed some .exe flash projecter game file (which I made from some .swf files ranging few Kb but the .exe were in mb i.e. a game of 150Kb was 5.15mb in .exe form) and got about 53% compression. What I want to know what kind of files generally don't get much compressed (if there is some pattern).

[gameranand]

Well you see compressing a file mostly depends on what to say hmm.....in simple words repetition. So if you have files like mp3 or jpgs then you won't get that far no matter what you use but yes UHARC and 7 zip have very good compression ratio.

Compression relies on redundancy (ie, duplicate data). More the redundancy higher the compression. there's always a limit as to how much redundant data is there, and data can't be compressed beyond that.
besides most game files,jpegs,mp3 etc are already compressed, so even if you compress it again, it wont get compressed my much

[Gaurav265]

also try free arc which compress in .arc format.i have compressed just cause 2 in 1.15gb from 4.5 gb

[Zangetsu]

Originally Posted by abhinav_sinha

I have a question though about the compression ratio. Some time I get as much compression as 50-60% and some times just about 2-3%. Ex-I compressed some .exe flash projecter game file (which I made from some .swf files ranging few Kb but the .exe were in mb i.e. a game of 150Kb was 5.15mb in .exe form) and got about 53% compression. What I want to know what kind of files generally don't get much compressed (if there is some pattern).

well the compression ratio depends on type of file.
for e.g: a software setup of 200MB will get compressed to 198~199MB only...
bcoz the files inside it are already compressed.

but a group of jpeg files of 100MB can be compressed to 20~30Mb or even more.

so AFAIK u cant do a double compression(compression twice)

[Geek-With-Lens]

Try Compression With KGB Archiver It beat 7Zips & Uharc. I Personally Compressed a 500mb files to a 2MB archive. First I Didn't Believe But It Is True. It Take Hours To Compress & Uncompress.
Download KGB Archiver 2.0.0.2 Beta 2 / 1.2.1.24 Free - KGB Archiver is the compression tool with unbelievable high compression rate. It beats UHARC and 7zip!! - Softpedia

[lm2k]

It will depend the file type, for example compressing audio mp3 or jpeg or video with audio wont result in much reduction in size. Also try to up the dictionary size in 7zip which would increase the compression for sure.7zip offers huge dictionary size even upto 1gb

[abhinav_sinha]

Compression relies on redundancy This is what I wanted to know. In case of installer files I know they are already compressed but the point is every compressing software claims to be the best but I didn't see the type of data they compress to show their ratio.
@Gaurav, @Geek-With-Lens: What kind of data you compressed?

[Geek-With-Lens]

Originally Posted by abhinav_sinha

Compression relies on redundancy This is what I wanted to know. In case of installer files I know they are already compressed but the point is every compressing software claims to be the best but I didn't see the type of data they compress to show their ratio.
@Gaurav, @Geek-With-Lens: What kind of data you compressed?

i compress game setup folder.

[abhinav_sinha]

You mean some files and the installer.exe type folder. Well that can be done.I have seen 750mb from 8.5Gb. I was saying if there is only one file for a setup then it won't go much further.

[Geek-With-Lens]

Yes. ISO Files, Single Files Like Videos,etc will not compress much higher

[gameranand]

Well actually some games are not nicely compressed take for example Left 4 Dead it was available for 917MB on net. So I tried that myself and I got to about 1GB so it depends on files whether they have redundancy or not. Even if you see rippers they usually compress the installed material not the setup. Installed content is easy to compress with several tools but the setup are hard.

Originally Posted by Geek-With-Lens

i compress game setup folder.

What ratio you achieved???

[arpanmukherjee1]

i want to but wont benefit anything if i compressed my data.
images and videos will be reduced only by ~ 5 -10 MB .

anything else is frequently used and the time taken to uncompress is too painful for me.
i generally compress my backup source codes that come down from ~500 MB to ~100MB on winrar best compression.

tried UHARC once on 700 MB game ISO. it reduced to only 650 MB

[Zangetsu]

Originally Posted by arpanmukherjee1

i want to but wont benefit anything if i compressed my data.
images and videos will be reduced only by ~ 5 -10 MB .

anything else is frequently used and the time taken to uncompress is too painful for me.
i generally compress my backup source codes that come down from ~500 MB to ~100MB on winrar best compression.

tried UHARC once on 700 MB game ISO. it reduced to only 650 MB

u can't achieve a good compression on ISO,videos,.exe setups etc.
& the rips we are seeing on net for games are compressed using advanced tools for us....such as mp3 injector & converters for compressing files

[gameranand]

Well I told ya before that compression is based on Data Redundancy. Normally setup files are already compressed so you won't get much from that. Also the Rips we see all over net are not exactly setup compress but they are installed content compress.

Well you see a notepad file with millions of same character say "A" will compress more than a notebook file with million random characters because in first case redundancy is more as compared to second one.

[tkin]

Originally Posted by NitrousNavneet

I want to compress my file
Winzip , 7-zip etc are not compresses file enough .
I want to convert my 7.5gb file into 4.7 gb.

What file? I guess game ISO? You can't,most game ISOs are already compressed, for example 7zip ultra compression(LZMA2) on 4.38GB ISO got it to 4.34GB.

If 7Zip ultra can not do it, I doubt anything else will do much.

[ico]

ISO is actually a 1:1 ratio container format. If the data inside an ISO file is highly compressed (usually the case with games etc. like tkin said), then it won't get compressed more using 7z/rar. If the ISO contains lots of compressible stuff like Office XP/2003 files, then the ISO will get compressed.

[abhidev]

Originally Posted by Geek-With-Lens

Try Compression With KGB Archiver It beat 7Zips & Uharc. I Personally Compressed a 500mb files to a 2MB archive. First I Didn't Believe But It Is True. It Take Hours To Compress & Uncompress.
Download KGB Archiver 2.0.0.2 Beta 2 / 1.2.1.24 Free - KGB Archiver is the compression tool with unbelievable high compression rate. It beats UHARC and 7zip!! - Softpedia

decompression is comparatively faster....well it surely gives the highest compression but also requires a solid hardware to do that......

i had POP-WW in just 500kb of file size....decompressing it got me arnd 2-3gb...

can anyone with a sandybridge proccy try compressing files using kgb archiver as the proccy is said to have best performance in compression.....???

[tkin]

Originally Posted by abhidev

decompression is comparatively faster....well it surely gives the highest compression but also requires a solid hardware to do that......

i had POP-WW in just 500kb of file size....decompressing it got me arnd 2-3gb...

can anyone with a sandybridge proccy try compressing files using kgb archiver as the proccy is said to have best performance in compression.....???

Give me some time, I'm downloading now, I will be compressing a game ISO.

[ico]

Time to see how much time i7-2600k takes.

My Pentium 4 would have taken years.

[tkin]

Ok, compressing it, now kgb archiver is an old software and does not have proper multithreading support, nor does it support any advanced extensions of nehalem or sandy architecture, so its slow as hell, when using 7 zip I get full cpu utilization on ALL cores, and 6GB ram is used, now look at KGB:




Current projected time is 14 hours, hell it should only take an hour if all the cores are maxed out.
Projected file size is 2.2GB(4.4GB master file) and interestingly its increasing, so at the end of the day I doubt it will get much lower . Now if only the author actively developed it, its been abandoned since 2007.


Update: While I was uploading the pic, projected size got to 2.4GB. Also time became 17hrs.

Update: Its 2.6GB now and increasing. Time is increasing as well, is this a practical joke?

Update: 2.7GB now, I think it will end up around 4GB, like 7zip ended up, but 7zip took like 10 mins.

Update: 2.9GB, If this crosses 3.5GB I'll stop the compression, not worth time.

[NitrousNavneet]

Originally Posted by abhidev

decompression is comparatively faster....well it surely gives the highest compression but also requires a solid hardware to do that......

i had POP-WW in just 500kb of file size....decompressing it got me arnd 2-3gb...

can anyone with a sandybridge proccy try compressing files using kgb archiver as the proccy is said to have best performance in compression.....???

Can I run KGB in my PC .
| | |
Configs \/ \/ \/