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

Solution 1

"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.

Solution 2

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

Solution 3

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

Solution 4

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

View more solutions

Comments

[Tenaciousd93]

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

[Matthew Morek]

Note that output directories you're pointing to must exist, as ImageMagick will no create them, causing a mogrify: unable to open image error.

[inukaze]

This don't work with i try with png and put 1024x600 , all images are resized to 800x600 instead 1024x600

[ashleedawg]

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)

[Саша Черных]

@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 for details. +1 from me to mahesh madhusudan. Thanks.

[virtuvious]

Thank you very much @СашаЧерных ....!!! I was trying to recollect why I had done this... as it was long back ago....

[Violet Giraffe]

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\

[Dmytro Vyprichenko]

@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, but it is not applicable to mogrify, afaik.

[Violet Giraffe]

I see, thank you very much for this answer-comment as well as the main answer!

[yajnesh]

For someone who always gets confused with width and height. Width comes first. width x height