Batch resize images and output images to new folder with ImageMagick

Question

Current image folder path:

public_html/images/thumbs

Output image folder path:

public_html/images/new-thumbs

I have 10 video thumbs per video in current folder, named of image thumbs:

1-1.jpg
1-2.jpg
1-3.jpg
1-4.jpg
1-5.jpg (Resize)
1-6.jpg
1-7.jpg
1-8.jpg
1-9.jpg
1-10.jpg

2-1.jpg
2-2.jpg
2-3.jpg
2-4.jpg
2-5.jpg (Resize)
2-6.jpg
2-7.jpg
2-8.jpg
2-9.jpg
2-10.jpg

I want to resize all 5th images(*-5.jpg) to the new folder. I've tried below command but no luck:

mogrify 
-path 
  public_html/images/thumbs/*-5.jpg 
-resize 16×12 
-quality 100 
  public_html/images/new-thumbs/*-5.jpg

Dmytro Vyprichenko · Accepted Answer · 2022-03-29T21:19:44.430

128

"Mogrify" should be called from the directory with the original thumbnails, while the -path parameter is for pointing target directory.

mkdir public_html/images/new-thumbs
cd public_html/images/thumbs
magick mogrify -resize 16x12 -quality 100 -path ../new-thumbs *.jpg

http://www.imagemagick.org/Usage/basics/#mogrify

The last arguments are the list of files, so you can filter by name 1-*.jpg for example.

edited Mar 29 '22 at 21:19

answered Aug 02 '13 at 13:31

Dmytro Vyprichenko

4,234
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14

You are right, but you can also call `mogrify` from any directory, for example I convert originary jpeg into png with `mogrify -path /destination/path/ -adaptive-resize 5000 -unsharp 0x1 -format png /originary/path/*.jpeg` – Tenaciousd93 Oct 22 '14 at 11:36
16

Note that output directories you're pointing to *must exist*, as ImageMagick will no create them, causing a `mogrify: unable to open image` error. – Matthew Morek Jan 26 '16 at 12:55
This don't work with i try with png and put 1024x600 , all images are resized to 800x600 instead 1024x600 – inukaze Jan 30 '18 at 23:00
1

Well great, I specified `path` but it nuked the original files nonetheless. Is there something wrong with my command line? This is Windows, hence the back slashes: `mogrify -resize 2752 *.tif -path E:\1\ ` – Violet Giraffe Dec 28 '20 at 14:07
2

@VioletGiraffe, options order matters, it should have been like that: `mogrify -resize 2752 -path E:\1\ *.tif` (note that *.tif is in the end). What you tried was like passing an image [setting or operator](https://stackoverflow.com/questions/26579299/imagemagick-command-line-option-order-and-categories-of-command-line-parameters), but it is not applicable to mogrify, _afaik_. – Dmytro Vyprichenko Jan 04 '21 at 14:00
1

I see, thank you very much for this answer-comment as well as the main answer! – Violet Giraffe Jan 04 '21 at 15:54
For someone who always gets confused with width and height. Width comes first. width x height – yajnesh Apr 15 '21 at 15:27

score 13 · Answer 2 · edited Aug 22 '21 at 14:21

13

Suggested solutions do not work properly on the latest ImageMagick (at least, on macOS). Command, that works overwriting source images is as follows:

magick mogrify -path ./ -resize 50% -quality 80 *.jpg

To avoid overwriting the original images, write to a new folder:

magick mogrify -path path/to/destination/folder/ -resize 50% -quality 80 *.jpg

edited Aug 22 '21 at 14:21

Eureka

3,272
15
20

answered Oct 11 '19 at 13:24

Nigidoz

302
2
5

score 9 · Answer 3 · edited Oct 06 '19 at 14:44

9

In ImageMagick 7 versions its built into the magick ...so..

magick mogrify -resize 16x12 -quality 100 -path ../new-thumbs *.jpg

Make sure that the folder you specify in path exists. It will not be created by ImageMagick.

Find more information here https://www.imagemagick.org/script/mogrify.php

edited Oct 06 '19 at 14:44

JoschJava

962
9
19

answered Dec 07 '17 at 01:37

virtuvious

2,242
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This is exactly the same as the accepted answer, only 4 years later. Why? (I guess you added the word "magick" to the front of it, but it runs fine without that (no added value) – ashleedawg Dec 30 '18 at 17:03
2

@ashleedawg, without `magick` I get `Cannot find file at '..\\lib\imagemagick.tool\tools\mogrify.exe'` in output in my Windows for ImageMagick 7. See [**this answer**](https://stackoverflow.com/a/41094852/5951529) for details. +1 from me to mahesh madhusudan. Thanks. – Саша Черных Jan 23 '19 at 08:07
1

Thank you very much @СашаЧерных ....!!! I was trying to recollect why I had done this... as it was long back ago.... – virtuvious Jan 23 '19 at 18:32

score 2 · Answer 4 · answered May 19 '17 at 18:53

For those having Shotwell installed on Ubuntu/Debian, following may be more easy to export selected images in a folder to another folder through processing the images as needed.

Open Shotwell
Select the images you want to export
File > Export
Adjust the values to your needs
Select the folder to export

Batch resize images and output images to new folder with ImageMagick

4 Answers4

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