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  1. #1
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    large file sizes for Power Point files with images (2000)

    Here is the scenario. I have a .jpg file that is only 40K. As soon as I insert that .jpg image onto a slide without any other text on it or anything and save the power point presentation, the file size of the power point presentation suddenly goes up to 77K. Why the sudden jump in file size? This is not a big deal for just a few images, but I have a presentation with all .jpg files in it, about 25 slides, and the file size is about 5 MB, even though the total size of all the images isn't that much at all. Any reason why power point is inflating the file size so much? Is there any way to keep the file size down for presentations that have a lot of images in them?

    -Kelley

  2. #2
    Super Moderator WebGenii's Avatar
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    Re: large file sizes for Power Point files with images (2000)

    You raise an interesting question.
    So I just ran an little experiment. Here are my notes.

    I created a ppt file without anything in it. File size is 8K.
    Inserted a 12K graphic and now the file size is 39 K. Where did the other 19K come from?
    Added a new slide and now the file size is 45k. (up by 6 k for a new slide?)
    Inserted a 11k graphic and now the file size is 57k (which seems more reasonable). Up by 1k - overhead for the graphic maybe?
    Added a new slide and now the file size is 59k (only 2k for this slide - why not 6k?)
    Then I just fooled around and started hitting the save button - and guess what, the file size grew by 1K for each save!
    I just added a third graphic, and the file size went up by the graphic size + 2k.
    Final file size = 79k
    Now - saved that file as a pps, file size is now 71k.
    Added a 3k graphic, file size is 74k.
    8k single slide pps
    Inserted a 12K graphic and now the file size is 39 K.
    Added a new slide and now the file size is 45k. (up by 6 k for a new slide?)
    The pps file also grows by 1k per save!


    <img src=/S/confused.gif border=0 alt=confused width=15 height=20> <img src=/S/headthrob.gif border=0 alt=headthrob width=15 height=15> Interesting!
    [b]Catharine Richardson (WebGenii)
    WebGenii Home Page
    Moderator: Spreadsheets, Other MS Apps, Presentation Apps, Visual Basic for Apps, Windows Mobile

  3. #3
    3 Star Lounger siflaar's Avatar
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    Re: large file sizes for Power Point files with images (2000)

    Catharine,

    You first 19K could be explaned because you first saved an empty file, and second a file with data, so PP problable stoes extra information, like color settings, page layout, handout info e.d.

    Greetings,
    Greetings,

    Patrick Schouten
    (The Netherlands)

  4. #4
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    Re: large file sizes for Power Point files with images (2000)

    Another point is when you hit the save button, you are doing an update to a current file not creating a new one. This is usually "tag-on" information on what was added/deleted, etc.

    Test this by taking a current PPpresentation you already have and know the size of. Let's say it's 2748K (why? because that's the size of a presentation I have to work with!). Save it as "test saves". The "NEW" file is only 2739k. Why? we got rid of all the "adds/deletes, etc" infomation.

    Next delete all of your slides and hit the save button. My file dropped to 128k. --128K for a blank (empty)presentation! This is really curious.

    On previous (97 I think) versions I've done this and had the file GROW. -Go figure

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    Re: large file sizes for Power Point files with images (2000)

    I beleive that the images get converted to a different format like they do in Word. This is way all Word files grow at a fast rate when using imbedded images compared to links.
    <img src=/S/aflame.gif border=0 alt=aflame width=15 height=15>

    Now running HP Pavilion a6528p, with Win7 64 Bit OS.

  6. #6
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    Re: large file sizes for Power Point files with images (2000)

    PP2000 ought to be saving jpegs in compressed form, unlike earlier versions.

    What happens when you Save As to a new filename - does the filesize reduce (by getting rid of extraneous info from previous "Saves").

    Are you "inserting" the graphics as opposed to "pasting"? The latter will probably change the format of the pasted graphic that might not compress.

    Ppt also makes a preview version of the first slide, so that adds some overhead - not much, but it's there.

  7. #7
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    Re: large file sizes for Power Point files with images (2000)

    I believe Tony has the crux of the matter here. PP does not compress pics that have been pasted in, so a Jpeg file of 20k, can give a ppt file a HUGE increase, because the pic is now uncompressed.

  8. #8
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    Re: large file sizes for Power Point files with images (2000)

    I've found linking to the graphic files helps a great deal. Sure it's a pain if you're presenting the presentation without the aid of your network server which stores the photos and such, but if you're using a laptop, or have access to a CD-R, it's a great solution.

    Just my CDN <img src=/S/2cents.gif border=0 alt=2cents width=15 height=15> worth.
    Christopher Baldrey

  9. #9
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    Re: large file sizes for Power Point files with images (2000)

    Now here's something to try. Take any presentation you have, now create a blank one & copy all the slides into the blank one, save it & check the size then. I believe that most Office apps save Undo information (unless turned off in the options), a new file from blank should/could be smaller.

  10. #10
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    Re: large file sizes for Power Point files with images (2000)

    If you disable the fast save option (I don't know the correct English expression as I use a German version) storing needs longer, but the files remain smaller and are not scrambled with update information.
    Also if you put a blank slide in front, the preview picture is smaller. In addition PP stores pictures in a different format which needs more space (at least it did in PP97).

  11. #11
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    Re: large file sizes for Power Point files with images (2000)

    Pasting Special as a picture can significantly reduce the size of presentations with graphics. Test first, tho!

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