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The meaning of word "cat" in cathollis.com is a small carnivorous mammal. It also means a Unix utility that concatenates and lists files.
blog media encode infos
Image
aspect ratio
Images on this website use one of the following aspect ratio: 3:2, 16:9, 16:10, 1.35:1, 1.85:1, 2.35:1, 4:3, 1:1
They are all common aspect ratio in photograph, television, web and films.
size
All images will be resize to 1440x.
colorspace
originally AdobeRGB/P3, but will processed to sRGB
encode
webp
desensitization
For the characters appearing in the picture, apply the mosaic algorithm.
For reflective objects appearing in the picture, because they may expose information, apply the gaussian blur algorithm.
command
using imagemagickmagick .\in.xxx -filter Lanczos -resize "1440x1440>" -quality 50 -define webp:lossless=false -define webp:auto-filter=true -define webp:method=6 out.webp
Video
command
encode using ffmpeg with libamo1ffmpeg -i .\in.xxx -c:v libaom-av1 -vf "scale=-1:720" -b:v 1M -pix_fmt yuv420p -an -pass 1 -f null NUL
ffmpeg -i .\in.xxx -c:v libaom-av1 -vf "scale=-1:720" -b:v 1M -pix_fmt yuv420p -an -pass 2 out.webm