Batch resize images and output images to new folder with ImageMagick
“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 16×12 -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.