Degrade image quality until a certain size(KB) is reached

[6martina6]

Hi all,

I need a script to degrade the quality of an image until 50kB of size is reached.
Do you know if it's possible to achieve this using IM?

Thank you very much

[magick]

If the image is JPEG, to restrict the maximum file size, use jpeg:extent, for example -define jpeg:extent=400kb. See http://www.imagemagick.org/script/formats.php and look for the JPEG format. This option is only available in ImageMagick 6.5.8-10 and above.

[6martina6]

This is really usefull!
Thank you very much

[fmw42]

see my unix bash script, downsize at link below

[6martina6]

Hi Fred, I know about your downsize script!
It looks great but actually I've to keep the width/height of my jpeg and degrade the quality. -define jpeg:extent is fine for my intent.
Thanks