who needs AI when we have a wonderful package like ffmpeg. use "convert" part of ffmpeg package convert -resize 25% in-file.jpg out-file.jpg convert -res

who needs AI when we have a wonderful package like ffmpeg. use "convert" part of ffmpeg package convert -resize 25% in-file.jpg out-file.jpg convert -resize 25% 1.jpeg 1.png This will reduce the size to 25%, not by 25%. in-file.jpg 235.5 Kib 1200x1600 -->> out-file.jpg 35.8 Kib 300x400 ------------------------------- use mogrify batch: mogrify -resize 25% *.jpg # keep image aspect ratio mogrify -resize 60% *.png # keep image aspect ratio mogrify -resize 320x240 *.png # keep image aspect ratio see the ! mogrify -resize 320x240! *.png # don't keep image aspect ratio mogrify -resize x240 *.png # don't keep image aspect ratio mogrify -resize 320x *.png # don't keep image aspect ratio