rav1e
SVT-AV1
| rav1e | SVT-AV1 | |
|---|---|---|
| 70 | 181 | |
| 3,694 | - | |
| 0.6% | - | |
| 8.5 | - | |
| 5 days ago | - | |
| Assembly | C | |
| BSD 2-clause "Simplified" License | BSD 3-Clause Clear License The Clear BSD License |
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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).
SVT-AV1
- Intel Discontinues High-Speed, Open-Source H.265/HEVC Encoder Project
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'Meridian': Why Netflix Is Helping Competitors with Content and Code
Netflix's work on SVT-AV1 has also been important. It has delivered a fast and efficient encoder for AV1:
https://netflixtechblog.com/introducing-svt-av1-a-scalable-o...
https://netflixtechblog.com/svt-av1-an-open-source-av1-encod...
SVT-AV1 has since been adopted by AOMedia:
https://gitlab.com/AOMediaCodec/SVT-AV1
With SVT-AV1 on the right hardware you can achieve encode times similar to x264, x265, and libvpx by choosing the right preset and still achieve better image quality. See the "computation trade-offs" graph in this blog post:
https://engineering.fb.com/2023/02/21/video-engineering/av1-...
- H.264 Is Magic (2016)
- SVT-AV1 Encoder and Decoder
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Any recent comparison between the encoders, specially rav1e and SVT-AV1?
The docs mention that the unit for this option is in "frames" (not "seconds").
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SVT-AV1 git: Neon optimizations across all processes - part2
From the pull request:
- SVT-AV1 git: Updating encoding parameters during the encoding session (RTC only)
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Guide to Adopting AV1 Encoding
In these tests SVT-AV1 beats x265 on quality:
- FullHD: http://compression.ru/video/codec_comparison/2022/main_repor...
- FullHD 10-bit: http://compression.ru/video/codec_comparison/2022/10_bit_rep...
- 4K: http://compression.ru/video/codec_comparison/2022/4k_report....
SVT-AV1 has seen a number of speed ups in recent releases:
https://gitlab.com/AOMediaCodec/SVT-AV1/-/releases
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10-bit and 4:2:2 Chroma Subsampling support for AV1?
I don't see this options under the "Advanced features" like for H.265/HEVC (for example). Also, adding "-input-depth 10" manually to the command line doesn't work (it doesn't recognize the parameter, despite it clearly being written here as one of them).
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Does Handbrake publish AV1 documents?
Docs for SVT-AV1 at https://gitlab.com/AOMediaCodec/SVT-AV1/-/tree/master/Docs
What are some alternatives?
dav1d - A read-only mirror of dav1d source code repository. The origin is at https://code.videolan.org/videolan/dav1d/
Av1an - Cross-platform command-line AV1 / VP9 / HEVC / H264 encoding framework with per scene quality encoding
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
FFmpeg-Builds
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.
aom-av1-lavish - A fork of aom-av1-psy, which is a fork of aomenc. Designed to open up the encoder for hyper-tuning and fidelity.
obs-amd-encoder - AMD Advanced Media Framework Encoder Plugin for Open Broadcaster Studio
media-autobuild_suite - This Windows Batchscript helps setup a Mingw-w64 compiler environment for building ffmpeg and other media tools under Windows.
libavif - libavif - Library for encoding and decoding .avif files
ab-av1 - AV1 re-encoding using ffmpeg, svt-av1 & vmaf.
broot - A new way to see and navigate directory trees : https://dystroy.org/broot