Notices by Gianni Rosato (gianni@disobey.net), page 2

@kornel Thank you! Hoping it will provide value for someone :)

The chroma subsampling is difficult … I’ve done a couple of things in Iris to mitigate its negative impact, but it remains a challenge.

As for testing, I think the most valuable test would be the one on the Iris webpage (https://halide.cx/iris/index.html).

Daala’s subset2 source images are all 4:2:0 which is unfortunate, but the numbers look similar with 4:4:4 subset1 (couldn’t find the same for subset2) favoring AVIF a bit.

@Schweinepriester Here’s a comparison to the latest libjxl release (green) among others. It is hard to compare libjxl sometimes, because it excels on really difficult images but often isn’t as good on average. Also, it is best in the high fidelity range, but we’re measuring from SSIMULACRA2 0-80 for BD-rate (meaning low through high fidelity, but not ultra-high)

@eeeps Jon is such an impressive inspiration in the field. Him & the other JXL authors are people every engineer should look up to.

Introducing Iris-WebP, a better WebP encoder: https://halide.cx/iris/index.html

Iris offers up to >20% better compression than libwebp, and trades blows with libaom for AVIF.

My goal is to build an image-first encoder ecosystem for the modern Web, so that new web image codecs aren't generally superfluous.

#av1 #webp #compression

"I designed my own ridiculously fast game streaming video codec – PyroWave"

https://themaister.net/blog/2025/06/16/i-designed-my-own-ridiculously-fast-game-streaming-video-codec-pyrowave/

Cool to see https://github.com/psy-ex/metrics in use in the wild, I'm glad it was useful!

Help restore the tax deduction for software dev in the US (Section 174)

https://news.ycombinator.com/item?id=44226145

If you live in the US and you've ever used a piece of software, you're probably interested in this. There's a sign-able letter attached.

Updated numbers for Eve-AV1 & Eve-VP9 are public! The last time they were updated was around 2019, so this should give a more relevant look at how they perform.

It takes a lot to improve a mature video encoder, and I'm very impressed with the Eve lineup.

#av1 #video #transcoding #encoding #codec #vp9

Ever-evolving, the latest GNOME desktop release brings a host of new features, including digital wellbeing tools, battery charge limiting, and support for HDR https://www.omgubuntu.co.uk/2025/03/gnome-48-best-new-features

#linux #foss #opensource #gnome

GNOME 48 is here!

https://release.gnome.org/48/

#GNOME

Jpegli works in PDF

https://pdfa.org/jpegli-works-in-pdf/

Not that crazy of course, but cool to see jpegli getting coverage!

libaom, the reference AV1 encoder, has a new release: https://aomedia.googlesource.com/aom/+/refs/tags/v3.12.0

I’m super happy to have been featured in the release credits, and even happier that our image quality improvements designed for AVIF have come to libaom from SVT-AV1-PSY. For those looking to deliver the best quality per bit for images on the Web, hopefully the new `--tune iq` will help you out.

#av1 #avif #images

SVT-AV1-PSY v2.3.0-B is here! The release notes are public on the SVT-AV1-PSY website: https://svt-av1-psy.com/releases/#v2.3.0-B

I'm super happy the team has continued work on this tool even as I’ve left the project. Very excited to see continued development!

#av1 #encoding #video

Sadly, I’ve had to relinquish development of rAV1ator CLI, a command line encoding utility I’ve been enjoying working on for a while. I thought initially that this would be the end of the tool’s existence.

Luckily, I was wrong! I new maintainer has stepped in to keep up a fork: https://github.com/ultimaxx/rav1ator-cli

If you’re interested in continuing to use rAV1ator CLI, please use this fork. Thank you, ultimaxx!

#av1 #encoding

Running Private DeepSeek R1 with Verifiable Security: https://tinfoil.sh/blog/2025-02-03-running-private-deepseek

Many people are (rightfully) worried about the access AI service providers have to user data. Tinfoil appears to fix this problem outright for everyone using AI in the cloud.

#AI #llm #deepseek #privacy

Are there good music player on Linux, that let you explore your library by artist or genre?

🔄 Boosts welcome to free more songs

#music #localComputing #linux

New releases of Box64 and Box86 are here: https://box86.org/2024/12/new-version-of-box64-v0-3-2-and-box86-v0-3-8/

#linux #arm #riscv

@eeeps It most certainly does - we will definitely be in touch soon!

I’m stepping down as a core developer for SVT-AV1-PSY. I’ll still act as maintainer, but I won’t be on the programming side from now on for reasons that will become obvious soon.

All is well — this is overall a good thing. More info here: https://giannirosato.com/blog/post/end-of-psy/

AAA - Analytical Anti Aliasing

https://blog.frost.kiwi/analytical-anti-aliasing/

@aeva I’m not super sure how much AI image generation models struggle with noise, but modern video & image compression algorithms struggle quite a bit which may be part of why the noiseless look has become so desirable. I’m certainly in the camp that thinks noise can be pretty, and in modern films, it is often added in post.

Subjectively, I think *chroma* noise is what makes noise look bad. Try denoising only the chroma planes of your render with some wavelet denoiser and see if you agree.