Rachel Barker

@rachelplusplus.me.uk

72 Followers 73 Following

Software witch, environmentalist, and amateur musician. This is my non-worksona side, where I like to do things from scratch to learn how they work then tell the world about it. Blogs at https://www.rachelplusplus.me.uk/

A graph which is supposed to compare the performance of four different video encoders, but with wildly incorrect numbers: instead of expected numbers like +20% file size or 0.1 times a reference runtime, it has +3200% file size and 0.<forty zeros>1 times a reference runtime

A graph comparing the size of a compressed image file against the image quality. There are three pairs of curves, comparing libaom version 3.12.1, jpegli 0.11.1, and tinyavif 1.1. Each pair has one solid curve and one dotted curve, with the dotted curve representing the size vs. quality tradeoff for encoding at a single size, and the solid curve representing netflix-style multi-resolution encoding.

The curve for libaom is the leftmost, and the curves for jpegli and tinyavif cross over as each one does better at different quality ranges. The curves for multi-resolution encoding break away from the single-resolution curves and go further to the left at lower qualities, representing better compression due to switching to a smaller resolution.