Conversation

Notices

1. Embed this notice
   feld (feld@bikeshed.party)'s status on Wednesday, 04-Oct-2023 23:00:35 JST feld

   in reply to

   • Amolith
   oxipng compresses better than optipng or pngcrush
   • Embed this notice
     Amolith (amolith@nixnet.social)'s status on Wednesday, 04-Oct-2023 23:00:37 JST Amolith

     Pro tip for optimising images before uploading them somewhere like fedi so the recipient(s) don’t have to download 12 MBs of unimportant detail

     magick input.jpg -resize 1000x resized.jpg du input.jpg resized.jpg # see the size difference jpegoptim -s --all-progressive -m70 resized.jpg du input.jpg resized.jpg # see the size difference

     Resizing the image does most of the heavy lifting. Very few people will blow it up fullscreen on a 4k display; 1000px wide is usually sufficient. The jpegoptim command strips metadata (such as location), turns it into a progressive JPG so it loads more pleasantly, then reduces the image detail by 30%

     For PNGs, replace .jpg with .png and the jpegoptim command with

     optipng -o6 -strip all resized.png

     It strips metadata and brute-forces common compression settings to find which one is more efficient.

     Friends don’t let friends waste bandwidth! :akko_thumbup: