MV-Tractus
rav1e
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| MV-Tractus | rav1e | |
|---|---|---|
| 3 | 70 | |
| 103 | 3,568 | |
| - | 1.2% | |
| 3.4 | 9.2 | |
| 4 months ago | 5 days ago | |
| C | Assembly | |
| - | BSD 2-clause "Simplified" License |
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MV-Tractus
- H.264 is magic: a technical walkthrough
- motion vector pass
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Motion detection from video compression
look for libraries to extract motion vector from video streams. e.g. https://github.com/vadimkantorov/mpegflow or https://github.com/jishnujayakumar/MV-Tractus
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).
What are some alternatives?
mpegflow - A tool for easy extraction of motion vectors stored in video files
SVT-AV1
mv-extractor - Extract frames and motion vectors from H.264 and MPEG-4 encoded video.
dav1d - A read-only mirror of dav1d source code repository. The origin is at https://code.videolan.org/videolan/dav1d/
jpeg-xl
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
Computer-Vision-Video-Lectures - A curated list of free, high-quality, university-level courses with video lectures related to the field of Computer Vision.
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.
obs-amd-encoder - AMD Advanced Media Framework Encoder Plugin for Open Broadcaster Studio
Genann - simple neural network library in ANSI C
libavif - libavif - Library for encoding and decoding .avif files