On Tue, 27 Nov 2012 00:27:40 -0700, Wally
wrote:

I have a couple hundred JPG files of different aspect ratios. Hardly
any two are alike in dimension. Mostly they are approx 4:5, but that
is rough. They were just cropped over the years for best display on
the screen.

Now I want to make prints of them, and the prints need to be 4x6 inch
because that is the standard and cheapest, and will fit into the most
common albums.

The places that print JPGs allow me to crop the pics to fit 4x6, but
in most cases that will crop picture area that I don't want to lose.
Instead I would like the whole file printed, leaving white margins (or
some other color) on either side. But those places won't allow me to
do that.

I can go into software and edit the pic to do this, leaving nice gray
margins on either side. But it's not practical to do a couple hundred
like this.

Irfanview supports batch jobs, and allows setting the canvas size to a
desired size in pixels. But that won't work for me, because the
original files don't have consistent dimensions.

Paint Shop Pro seems to be similar - I can set the required dimensions
in pixels or in length units, but that won't work if the origs have
many different sizes.

So I'm wondering if anyone has suggestions on how I can run a few
hundred pics through a software that only pads the pic with blank
areas to achieve an aspect ratio of 2:3.

Wally

Depending on the photo you may want to select the
area that is cropped because auto-cropping might
chop heads off etc.