Re: Shrinking a lot of jpegs?

[Adam Tauno Williams <adam@xxxxxxxxxxxxxxxx>]

> I'm looking for a program that can shrink a large amount of
> jpeg's by a certain percentage, without manual intervention.

"pnmscale" will enlarge/reduce a Portabel Network Map image.
If you can convert the image to pnm there are LOTS of
batch tools to do all kinds of pain to them, then convert
them into PNG with "pnmtopng"  Question is how to you 
auto convert a JPEG to a PNM,  that's the one I don't know.
Since you can convert GIFs, TIFFs, and PNG to PNM I'd
assume there is a way to do JPEGs.

> I realize that programs like "xv" and "gimp" can do this,
> but I only know how to do it manually.  Loading each picture,
> shrinking it, and saving it under a new name.  This is very
> time consuming for a large number of pictures.  I want to
> just give a directory or file list to a program, press ENTER
> and have it do them all without any more work.
> Is there a *Linux* program that can do this?

Well, it's a FSF program that comes with most Linux distro's.

>I've read something about gimp doing some scripts.
>Is that a possibility?  I'll read up on gimp if that is a
>good answer, but I don't want to go chasing my tail with
>gimp if it's not able to do this.

Someone want to do a "Gimp, The Nitty Gritty" presentation.
Systems and Network Administrator
Morrison Industries
1825 Monroe Ave NW.
Grand Rapids, MI. 49505