rav1e
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rav1e
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Learn x86-64 assembly by writing a GUI from scratch
Sure. You'll see it very often in codec implementations. From rav1e, a fast AV1 encoder mostly written in Rust: https://github.com/xiph/rav1e/tree/master/src/x86
Large portions of the algorithm have been translated into assembly for ARM and x86. Shaving even a couple percent off something like motion compensation search will add up to meaningful gains.
Or the current reference implementation of JPEG: https://github.com/libjpeg-turbo/libjpeg-turbo/tree/main/sim...
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SISVEL VP9/AV1 patent declared invalid in China
Again, if anything AOM would be the one restricting licenses to AV1 (if they chose to) except AOM has stated and also published AV1 in a way to allow license free access to development (which allows people to make forks of the official build like it's open source) and usage. (1)(2) I don't see why they would suddenly change this.
- Any new Opensource projects in (rust) looking for contributors. I want to start my journey as an OSS contributor.
- assembly from dav1d 1.1.0 now integrated into rav1e
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A little script to parse large libraries to AV1, if you're interested
You can speed up the sampling process with --vmaf n_subsample=5, which in my experience works more accurately than either 2 or 4, possibly due to this bug/feature present in multiple encoders. You might also need to manually set the number of threads used for VMAF calculation with --vmaf n_threads=16, but YMMV.
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rav1d: a Rust port of dav1d (currently experimental)
That remember me of https://github.com/xiph/rav1e which is an AV1 encoder
- A Safer High Performance AV1 Decoder
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rav1e wrong mastering-display output?
I put in the request for ffmpeg passthrough mastering-display data a few years ago and haven't heard of any support yet.
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HDR10, HDR10+, Dolby Vision with AV1?
It's getting there.. Initial steps for FFmepg: https://patchwork.ffmpeg.org/project/ffmpeg/list/?series=8444 rav1e: https://github.com/xiph/rav1e/pull/3000
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Release Notes: Safari 16.4 Beta adds AV1 codec + hardware decode for WebRTC
It's entirely possible to re-use bits of other HW encoders for the first pass (motion estimation, etc).
jpeg-xl
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Google's decision to deprecate JPEG-XL emphasizes the need for browser choice and free formats
I believe JXL's reference implementation isn't even to version 1 yet. 0.8.1 appears to be the latest. I could see them revisiting this once the reference implementation is considered complete.
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Very large (DICOM) microscopy images region and resolution transcoding tiling and resolutions
I asked for this a while ago, not sure how things have progressed since then.
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H.264 is magic: a technical walkthrough
That license doesn't say anything about patents. This one does: https://gitlab.com/wg1/jpeg-xl/-/blob/main/PATENTS and only says that patents owned by Google are covered. So it may be that other companies patent the technology. The information in the repository is not enough to decide whether JPEG XL is safe to use.
- https://gitlab.com/wg1/jpeg-xl
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I am a co-creator of JPEG XL (.jxl), a new image format. AMA!
The GIMP plugin is a great thing. But it still can't open/save images with special chars in their filenames. French, German and many other languages are affected. Could this be fixed soon? https://gitlab.com/wg1/jpeg-xl/-/issues/184
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Here's my googledrive of every current raw scan of my vintage 35mm slide collection of world travel and random families taken from estate sales around the world. Originally scanned 4800-6400dpi as .TIFFs but these are .jpegs. Feel free to comment your insight or download the whole thing. 2000+
https://gitlab.com/wg1/jpeg-xl/-/blob/main/doc/developing_in_windows.md It's not as straight-forward to build as it is on Linux. I'm not sure if there are official binaries somewhere, sorry.
- Improvements to the ubiquitous JPEG image format used across the internet will bring global bandwidth savings of 30 per cent, say the creators of the new technology, who have made it royalty-free.
- Is it possible to convert jxl directly to jxl?
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JPEG XL website and conformance testcases published on GitHub
I'm guessing the reference implementation with complete git history is soon to follow? https://gitlab.com/wg1/jpeg-xl
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JPEG XL support has been added to Firefox Nightly! (90.0a1 (2021-05-09)
The file format was 'frozen' last December: https://gitlab.com/wg1/jpeg-xl/-/tags/v0.2 Which is why FF can start implementing its usage.
What are some alternatives?
SVT-AV1
sharp - High performance Node.js image processing, the fastest module to resize JPEG, PNG, WebP, AVIF and TIFF images. Uses the libvips library.
dav1d - A read-only mirror of dav1d source code repository. The origin is at https://code.videolan.org/videolan/dav1d/
jxl-winthumb - A JPEG XL (*.jxl) thumbnail handler for Windows File Explorer.
SVT-AV1 - Welcome to the GitHub repo for the SVT-AV1! This repo is set to read-only for archiving purposes. Please join us at https://gitlab.com/AOMediaCodec/SVT-AV1. We look forward to seeing you there
highway - Performance-portable, length-agnostic SIMD with runtime dispatch
ffmpeg-build-script - The FFmpeg build script provides an easy way to build a static FFmpeg on OSX and Linux with non-free codecs included.
Video-Hub-App - Official repository for Video Hub App
obs-amd-encoder - AMD Advanced Media Framework Encoder Plugin for Open Broadcaster Studio
GD - GD Graphics Library
libavif - libavif - Library for encoding and decoding .avif files
highway - Highway - A Modern Javascript Transitions Manager