October 12, 2025
Introducing oavif
oavif is a new approach to target quality encoding in image compression, designed around smarter convergence strategies and quicker scoring to be as fast as possible.
Blog
August 18, 2025
The Multimedia Renaissance
The best open source video and image compression algorithms have improved significantly over the past year, and developer tools have miraculously kept up with this rapid pace. There has never been a better time for video.
March 15, 2025
Comparing Video Encoders
Comparing video encoders involves using synthetic metrics to assess visual quality, helping generate data that can be visualized. Plotting encoder performance in different ways helps determine the best encoder for specific implementation needs.
November 26, 2024
The End of SVT-AV1-PSY
SVT-AV1-PSY, a community fork of the SVT-AV1 video encoder, was created to enhance perceptual quality and ease of use for AV1 encoding. I co-created and currently maintain the project. Our new goal is to merge our features into SVT-AV1.
October 07, 2024
Stupidly Tiny Images
How tiny can very tiny banner images get?
March 13, 2024
QOI Encoding in Zig
Writing a fast and simple QOI encoder; illustrated with code examples, a spec breakdown, and step by step implementation instructions.
October 02, 2023
Lossless Data Compression
Comparing the efficacy of various lossless data compression algorithms on text data, comparing time to compress vs output size. The algorithms tested include ZIP, 7-zip, XZ, Brotli, Zstandard, and zpaq.
July 16, 2023
XYB JPEG
A brand new JPEG implementation from Google – called jpegli – supports the use of a perceptual colorspace to improve compression efficiency. How does it fare against other codecs, like WebP and AVIF?
June 14, 2023
Better JPEG Encoding From Google
JPEG is old, but a new perceptually optimized encoder just became available from Google called jpegli. Like the mozjpeg encoder aimed to outperform older JPEG implementations, jpegli aims to push the format to its limits in terms of compression efficiency.
April 15, 2023
Who Has the Best Hardware AV1 Encoder?
This article compares Nvidia's NVENC encoder to Intel's QSV encoder for AV1, as well as for other codecs. Who will win?
March 16, 2023
Photographic Corpus (lossy)
A collection of the images I used for the blog post published on the same day as this one, lossily compressed with JPEG XL. All images are licensed under CC BY-SA 4.0.
March 16, 2023
Image Codec Comparison
The current debate surrounding AVIF versus JPEG XL needs some third-party quantitative data to support arguments on either side. I've compiled a dataset of 27 high-resolution photographic images to compare performance across them all at a wide fidelity range.
February 28, 2023
Browser Benchmarks
Let's compare browser performance across a variety of architectures, operating systems, and browsers. Which browser is the most performant?
February 12, 2023
Aviator Versus Handbrake; Visual Quality Assessment
In this test, we will compare the latest Aviator release to the latest Handbrake release in terms of visual quality per bit.
February 11, 2023
Aviator 0.2.0
Aviator aims to enable simple, accessible AV1 encoding for everyone with a GUI powered by a fast AV1 encoder.
February 08, 2023
rAV1ator 1.0
rAV1ator, a powerful AV1 encoding GUI, sees its 1.0 release.
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