Highly Compressing a file

Discussion in 'Software Q&A' started by NitrousNavneet, Jun 23, 2011.

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  1. NitrousNavneet

    NitrousNavneet Racing 24X7

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    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.
     
  2. krishnandu.sarkar

    krishnandu.sarkar Simply a DIGITian Staff Member

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  3. OP
    NitrousNavneet

    NitrousNavneet Racing 24X7

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  4. krishnandu.sarkar

    krishnandu.sarkar Simply a DIGITian Staff Member

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    NitrousNavneet

    NitrousNavneet Racing 24X7

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    Ok
    I will test it
     
  6. krishnandu.sarkar

    krishnandu.sarkar Simply a DIGITian Staff Member

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    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.
     
  7. sygeek

    sygeek Active Member

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    Try compressing into tar.gz.
     
  8. jsjs

    jsjs New Member

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

    Zangetsu El Directo!

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    :+1: 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
     
  10. abhinav_sinha

    abhinav_sinha New Member

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    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).
     
  11. gameranand

    gameranand Living to Play

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    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.
     
    Last edited: Jun 23, 2011
  12. Gaurav265

    Gaurav265 A PC GAMER

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

    Zangetsu El Directo!

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    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)
     
  14. Geek-With-Lens

    Geek-With-Lens New Member

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  15. lm2k

    lm2k New Member

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    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
     
  16. abhinav_sinha

    abhinav_sinha New Member

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    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?
     
  17. Geek-With-Lens

    Geek-With-Lens New Member

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    i compress game setup folder.
     
  18. abhinav_sinha

    abhinav_sinha New Member

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    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.
     
  19. Geek-With-Lens

    Geek-With-Lens New Member

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

    gameranand Living to Play

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    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.
    What ratio you achieved???
     
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