Linux - fastest image size reduction (change resolution and photo quality)

Hi, I'm looking for the fastest way to reduce the image size on Ubuntu. I don't want to open GIMP or something like that every time I want to resize an image and click on all the options, it's tedious and unnecessary.

Thank you

REPLY

Hello,

I would see the fastest image reduction on Linux using ImageMagick and convert:

convert original.jpg -resize 640 -quality 80 resized.jpg
- This converts the original.jpg file to 640px with 80% quality to resized.jpg

To reuse this operation, I would define a function and set it to a bashrc file:
vim .bashrc

res() { convert $1 -resize 640 -quality 80 resized.jpg;}

Then just type res my-file.jpg in the terminal and you're done ....


PS: Bulk resize all the images in the directory here:
https://cloud.up4.cz/poradna/387-linux-jak-hromadne-zmenit-velikost-vsech-obrazku-fotek-v-adresari