Batch reduce images to 1mb

[_David_Delahay_]

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

[c.pfaffenbichler]

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_]

> 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.

-X

[try67]

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! 😉 ]

[Inchindown]

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