Cmd+Shift+3 > pdf. Can image be saved in other format?

Discussion in 'Mac Basics and Help' started by fayans, Sep 24, 2005.

  1. fayans macrumors 6502a

    fayans

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    #1
    By default it will be saved in pdf format. How about jpeg by default? Is it possible?
     
  2. Eidorian macrumors Penryn

    Eidorian

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    #2
    It's saved as .png as default. Just open it up in Preview and go to File > Save As. Then pick JPEG in the format dropdown.
     
  3. lexfuzo macrumors 6502

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    #3
    Panther saves as PDF, Tiger as PNG.
    You shouldn't save screenshots as JPEG anyway.

    If you are interested in a 3rd-party solution:
    I use SnapNDrag: http://www.yellowmug.com/
     
  4. fayans thread starter macrumors 6502a

    fayans

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    #4
    TQ. I suppose I cannot change the default save format then.

    Why not screenshot in JPEG? Mind to explain?
     
  5. Deepdale macrumors 68000

    Deepdale

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    #5
    I am interested in knowing that as well.
     
  6. fayans thread starter macrumors 6502a

    fayans

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    #6
    BTW, if I may ask : is there any simple freeware to reduce the size of screenshots for easy upload?
     
  7. Deepdale macrumors 68000

    Deepdale

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    #7
    When I experienced that same inability to upload due to size limitations being exceeded, the reply I received was to use ImageShack (a hosting service). It may be your solution, but it did not work for me. Then again, I am using OS 9.1.
     
  8. beige matchbox macrumors 6502a

    beige matchbox

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    #8
    Tinkertool used to be able to change the screenshot format, don't know if it still does, as i haven't used it for a long time :)

    And as to shouldn't save screenshots as jpeg... umm... i can't think of a reason, unless you need pixel perfect shots, then bmp would be the way to go :eek: lol :p


    Lastly, i found a small app to batch resize images on macupdate i think, no idea what it was called, but a search should bring something up without too much trouble :)
     
  9. fayans thread starter macrumors 6502a

    fayans

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    #9
    Not specifically for upload purpose. Thanks anyway! Try izoom but it crawls.
     
  10. fayans thread starter macrumors 6502a

    fayans

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    #10
    Update: Just download this tiny application ImageWell that does resizing easily.
     
  11. lexfuzo macrumors 6502

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    #11
    Sure.

    JPEG and PNG use different algorithms for compression:
    JPEG compresses block-wise under loss of information.
    PNG compresses lossless, more or less the same way ZIP does.

    JPEG is best suited for images with gradients, photographs for example. It is not very good when you have sharp lines on your image.
    PNG preserves the sharp edges, but it is not as efficient on gradients as JPEG.

    A typical screenshot has lots of straight lines, text (!) and areas of uniform color. Take this site as an example. Therefore PNG gives the better result.

    Try it for yourself: Take a screenshot, save it as JPEG and magnify the result. You'll see rectangular feathering around oblique lines that should be crisp. The bigger the compression, the stronger the effect.

    You may use JPEG for screenshots, of course, and maybe not even notice a visible difference to PNG, but in theory PNG gives the better result.

    The JPEG2000 format aims at combining the advantages of the two others.

    -lex
     
  12. edesignuk Moderator emeritus

    edesignuk

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    #12
    You know way too much about image file formats :eek:
     
  13. Deepdale macrumors 68000

    Deepdale

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    #13
    Lex, thanks for taking the time to outline key differences.
     
  14. Brize macrumors 6502a

    Brize

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    #14
    Download Cocktail, and change the default 'Screenshot file format' from within Interface>Misc.
     
  15. jsw Moderator emeritus

    jsw

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    #15
    Or download Onyx. In the Finder tab, go to the Screen Capture pulldown and select the format of your choice.
     
  16. lexfuzo macrumors 6502

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    #16
  17. lexfuzo macrumors 6502

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    #17
    :cool:
    I just happen to spend a lot of time with computers...
     
  18. fayans thread starter macrumors 6502a

    fayans

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    #18
    I couldn't find the Screen Capture pulldown in Onyx 1.5.2. Am I in the right place?
     
  19. fayans thread starter macrumors 6502a

    fayans

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    #19
    Thanks for the details!
     

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