Why doesn't compressing files actually compress?

Discussion in 'macOS' started by ckesten, Jun 24, 2008.

  1. ckesten macrumors regular

    ckesten

    Joined:
    Mar 27, 2008
    Location:
    New York
    #1
    Hello,

    I have a 30 pictures that were all together 800MB. I compressed them into one zip file that was still 800MB.

    Does anyone know how to compress to make them into one smaller file?

    thanks!
     
  2. Eraserhead macrumors G4

    Eraserhead

    Joined:
    Nov 3, 2005
    Location:
    UK
    #2
    It won't be possible as the photos were already pretty well optimised clearly ;).
     
  3. ckesten thread starter macrumors regular

    ckesten

    Joined:
    Mar 27, 2008
    Location:
    New York
    #3
    What do you think the best way to get these 30 pictures to my brother in another state? Its too big for email... I tried to send via ichat but it said it would take forever..

    is there no easier/faster way?
     
  4. Peace macrumors Core

    Peace

    Joined:
    Apr 1, 2005
    Location:
    Space--The ONLY Frontier
    #4
    You might try the old fashioned way. The united states postal service.;)
     
  5. Luis macrumors 65816

    Luis

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  6. Carrot007 macrumors regular

    Carrot007

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    Sep 18, 2006
    Location:
    Yorkshire
    #6
    Since they did not compress well they must be a fairly well compressed image already like jpeg for instance.

    That being the case your only option would be to re-size/re-compresss them to a samller size.

    If whoever you want to send them to needs them as they are then you'll just have to deal with the time it will take unfortuantly.
     
  7. jeremy.king macrumors 603

    jeremy.king

    Joined:
    Jul 23, 2002
    Location:
    Fuquay Varina, NC
    #7
    Flickr, picasaweb, .Mac, FTP, etc...

    Better yet, just have them printed at his local Walgreens.

    What kind of pics are these? 26MB+ a piece??!?!??!
     
  8. Sun Baked macrumors G5

    Sun Baked

    Joined:
    May 19, 2002
    #8
    Zip is lossless compression. Which for well optimized files may actually be creating a larger than what you are compressing.

    But it does allow you to make a folder, or project a simple single file drag and drop.

    If you don't mind losing some quality on your pictures, you can save them again into smaller files.

    ---

    If your connection is slow and you don't want to lose quality, there is always mailing a DVD or CD to your brother.
     
  9. heehee macrumors 68020

    heehee

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    #9
  10. wordmunger macrumors 603

    wordmunger

    Joined:
    Sep 3, 2003
    Location:
    North Carolina
    #10
    Those are some huge pictures! What will your brother be using them for? Just to view on-screen? If so, then you could just use the "share" via email command in iPhoto. Specify "medium" size and you'll be sending files that are only about 3 MB, which should be fine over email. Even "large" would only be about 12 MB, which would still work with many email providers.
     
  11. ckesten thread starter macrumors regular

    ckesten

    Joined:
    Mar 27, 2008
    Location:
    New York
    #11
    this seems like a good way to go.

    thanks everyone
     
  12. krye macrumors 68000

    krye

    Joined:
    Aug 21, 2007
    Location:
    USA
    #12
    If you're trying to compress something like a jpg, then you're out of luck. They're compressed already. A 6MP camera takes an image that is 6 million pixels, pretty much a 6 Meg image. So when you pull the image off your camera in JPEG format and it's like 1 Meg, that gives you an idea of how much compression is taking place already. It's like trying to compress an .mp3.
     
  13. Gwaredd macrumors newbie

    Gwaredd

    Joined:
    Nov 7, 2013
    Location:
    Wisconsin & Wales
    #13
    That's not exactly what I call an "easier/faster way." He'd be better off sending them by pony express. :D
     
  14. Mr. Retrofire macrumors 601

    Mr. Retrofire

    Joined:
    Mar 2, 2010
    Location:
    www.emiliana.cl/en
    #14
    Use TIFF with LZW-compression or a compressed RAW-format like DNG. Many printing houses use the lossless version of the JPEG2000 standard (inside PDF-files). If possible, use Photoshop, because some other tools do not support/preserve the image metadata.

    ZIP uses the deflate algorithm, which is a text compression algorithm.
     
  15. chown33 macrumors 604

    Joined:
    Aug 9, 2009
    #15
    This thread is from 2008.

    By now, the problem could have been solved by tortoise express.
     
  16. Mr. Retrofire macrumors 601

    Mr. Retrofire

    Joined:
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    Location:
    www.emiliana.cl/en
    #16
    The info is still relevant.
     

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