Compress and still leave in jpeg.

Question

I have 400 mg file on my g4 tiger that needs to be down sized to no more than 9 mgs. I took a snapshot with frame grabber during slide show but then the file is only 1.8 mgs too small.........?

Answer 1

You could try re-sizing the image via editing it; even in Preview,
it is possible to scale an image to the screen and then Crop it;
or even use the keyboard commands to screen capture the new
Preview window, to make a smaller image copy of the first one.
Preview can also allow you to 'Save As' a file, so if you do crop
an image or change it, you may want to +save the changes in+
+a new file name+, so the original won't be altered. This can give
you a second chance to try something else, if that isn't adequate.
And Preview can also be used to change an image file type.
Or get a freeware image editor from a trusted download site online.
I've used a fairly good one that goes by the odd name ToyViewer
and it has more tools than I'd know what to do with.
• ToyViewer for Mac:
http://www7a.biglobe.ne.jp/~ogihara/software/OSX/toyv-eng.html
What is the "real file size" you are working with? The abbreviation
for megabit, megabyte, gigabit, gigabyte, kilobyte, etc appear in
letters such as MB, GB, kb, etc. - {I am not sure what a mg is...}
Compression of a jpg file can result in something less than ideal;
in fact, there are losses in many image file types. Since you have
a large capture file to begin with, you should be able to reduce it
through re-sizing and it would still be a .jpg or .jpeg file type.
My image editing experiences, and captures from the Mac's screen
are somewhat limited; only a few thousand digital images and I try
to do minimal edits and almost no changes to my digital photos, as
I try to do the creative controls in the camera; as a realist, per film.
However that works out...
Good luck & happy computing!