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_David_Delahay_
New Participant
March 30, 2009
Question

Batch reduce images to 1mb

  • March 30, 2009
  • 3 replies
  • 2609 views
Is it possible to run a batch process to reduce a large number of image files to 1mb?
The images are all currently completely different size so file size could range from 3mb to 90mb. All images will be jpeg format so a file conversion doesn't need to be processed.

Many thanks
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3 replies

Inchindown
Inchindown
Inspiring
April 1, 2009
You might consider the commercial program called JpegSizer. This has an option to specifiy a file size when resizing, You can find a free trial of it here.

http://www.tangotools.com/jpegsizer/download.htm
    try67
    try67
    Community Expert
    March 31, 2009
    You can probably do it by saving the file at the highest quality, checking the size, and then reduce the quality by 1, save again, etc.

    [Edit: Damn you, xbytor! ;-) ]
    c.pfaffenbichler
    c.pfaffenbichler
    Community Expert
    March 31, 2009
    As far as I know the resulting file-size with both lossy and loss-free image-compressions depends on the content, so aiming a jpgs file-size at 1MB might be a rather vague intention and consequently a bit difficult to Script.
    Though maybe someone else has actual experience with such an operation?
    _
    _xbytor_
    Known Participant
    March 31, 2009
    > Though maybe someone else has actual experience with such an operation?

    The only solution (that has been arrived at more than once) is to start off with
    a jpeg quality of 10 or 12, save the image and check the file size. If it's too
    big, reduce the quality and try again. Using Export For Web instead of Save As
    will typically result in a better quality-compression trade off, but there is no
    known way to specify the desired image size ahead of time.

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