Script to resize JPEG files

[Salmon Trout]

Also, if we turn out to have a professional or pro-sumer's archive of big RAW images, something doesn't add up, because these people tend to be very conscious of storage backup and archiving issues, often choosing a large external hard drive or NAS for this purpose. So where is this? Of course you do get "gadget guy" type people who buy a "bridge" camera or DSLR and fill up their PC's internal hard drive with huge images they don't need.

[Salmon Trout]

The photos are tabout 2 to 7 megabytes each. How big a TV does it take to show a photo that is over 5000 pixels wide?

These aren't "huge"  digital camera images. The TV will scale so you can see the whole picture.

[Salmon Trout]

Have can anybody accumulate over 200 GB of JPEG photos in seven years?

The photos are tabout 2 to 7 megabytes each

That's between 30,000 and 100,000 images. Some slide show.

[Geek-9pm]

That's between 30,000 and 100,000 images. Some slide show.

I think the slide show is off. Unless it becomes a movie.  

[Geek-9pm]

Pardon me.  I am stuck on this. Can't sleep until I know. 
But I would like to know how to run any pho editor from command line. Some research shows GIMP is what I should try. But I have a hard time with the massive documentation.. 

I just want to know how to run it from the command prompt. Or else call it from Vb-script or some kind of script.

Anybody?  Please? 

[Salmon Trout]

What did you want the photo editing software to do? Just start, or perform some kind of scripted operation?

[Geek-9pm]

My objective is to made a batch file that would alter all the images found in a directory. Conversion from one format to another could be helpful. Orr seduction of detail or reduced color depth. Right now I am looking at photos  I have collected.

I would hope that a pho editor would his kind of syntax on the command line:
photo-editor <input file> <profile> <output file>
The profile. or template,  would have the parameters and a process to be performed. Such as convert to another format, or reduce the number of vertical or horizontal pixels.
GIMP is said to be able to handle calls coming from  C++ or python. That would imply something like a command line interface. -Right?

I did find a command line information for Format Factory, but I never got it to work. So I gave up.

Any help or suggestions are appreciated.   

[BC_Programmer]

seduction of detail

Seduction of Detail is provided by a Frisky Filter...

Gimp's batch processing is done through Lisp. Or at least, it sure looks like Lisp.

[Salmon Trout]

I would hope that a pho editor would his kind of syntax on the command line:
photo-editor <input file> <profile> <output file>
The profile. or template,  would have the parameters and a process to be performed. Such as convert to another format, or reduce the number of vertical or horizontal pixels.

I said it before, and I'll say it again: Image Magick (spelled thus) It has command-line options and a scripting language,

https://www.imagemagick.org/script/index.php

Code: [Select]

magick convert rose.jpg rose.png

Code: [Select]

magick convert rose.jpg -resize 50% rose.png

Code: [Select]

magick convert -size 320x85 canvas:none -font Bookman-DemiItalic -pointsize 72 \
  -draw "text 25,60 \'Magick\'" -channel RGBA -blur 0x6 -fill darkred -stroke magenta \
  -draw "text 20,55 \'Magick\'" fuzzy-magick.png

[Geek-9pm]

Thank you, Salmon Trout

No I have some reading to do and try and grasp how that works. It seems that either GIMP or Image Magick will do the work.

[Geek-9pm]

Well, it was just too much for me. I don't understand it.
So, I did some looking around and found...
Factory Image Converter.
The command line syntax was so simple that even I could understand it. After about three hours. Basically it is just source,  target, options. Works great!