Av1an
digital_video_introduction
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Av1an | digital_video_introduction | |
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65 | 8 | |
1,326 | 15,036 | |
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7.3 | 6.2 | |
21 days ago | 7 months ago | |
Rust | Jupyter Notebook | |
GNU General Public License v3.0 only | BSD 3-clause "New" or "Revised" License |
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Av1an
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Guide to Adopting AV1 Encoding
The hardware encoders are very fast and generally better than x264 (but not by as much as you'd think with the x264 slow preset).
In addition, there are threaded AV1 encoders you may be overlooking, like SVT-AV1. For non-realtime, my favorite is av1an, which also yields better quality than is possible from aomenc: https://github.com/master-of-zen/Av1an
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Automatic choose encode settings?
Basically Av1an.
There's also Av1an as suggested by someone else. It's going to produce more efficient encodes because it uses chunk-based encoding to reach the required VMAF for every single chunk, but this is also slower because every chunk will be re-encoded until the VMAF target is reached. It's also a PITA to compile, has a long list of bugs, and isn't very actively developed. One of the long-standing issues is that frames have a tendency to go missing during splitting, which IME is going to keep happening when the input files aren't standardized. And thus the recommendation is to transcode the input to lossless first, which is just completely unsustainable.
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VMAF is confusing me
Have you seen Av1an? It's supposed to encode to a target VMAF.
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[Guide] Installing av1an on Ubuntu 22.04
git clone https://github.com/master-of-zen/Av1an cd Av1an cargo build --release sudo ldconfig
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AV1 Encoder development series Part 1: working on rav1e in a different, better and more forward manner
Here's a couple of pages that cover the basics of aomenc: https://github.com/master-of-zen/Av1an/blob/master/docs/Encoders/aomenc.md https://gist.github.com/shssoichiro/a46ff01db70243c1719479f6518ea34d For more of a deep dive into settings, you can join the discord, lots of people share their settings and you can see what's working well for others.
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Should I recompress video I shot with mobile?
Av1an can even aim for a target quality.
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did I fail at preserving dvds? mpeg2 vs h264 vs av1
I like using NotEnoughAV1Encodes. There's also Av1an, and ab-av1.
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Currently impossible to use av1an on Windows?
In your case, I'd get one of the [nightly builds](https://github.com/master-of-zen/Av1an/releases/tag/latest) of Av1an. They should work with ffmpeg 5.
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Guide how to use av1an ?
1.9 release notes with Dynamic Progress Bar, Batch Encode, Config files https://github.com/master-of-zen/Av1an/releases/tag/1.9
digital_video_introduction
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Breakdown of AV1 Video Codec
There's a great introduction to video tech, including codecs, at https://github.com/leandromoreira/digital_video_introduction
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Ask HN: How can I learn about video encoding, h.264, ffmpeg, etc.
A good high-level breakdown of H.264: https://sidbala.com/h-264-is-magic/
Associated HN post (although there have been a few): https://news.ycombinator.com/item?id=30710574
More technical: https://github.com/leandromoreira/digital_video_introduction...
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H.264 is magic: a technical walkthrough
For those interested in this topic, I highly recommend the approachable but more extensive technical introduction at https://github.com/leandromoreira/digital_video_introduction
What are some alternatives?
HandBrake - HandBrake's main development repository
SVT-AV1
FastFlix - FastFlix is a free GUI for HEVC and AV1 encoding, GIF/WebP/AVIF creation, and more!
NotEnoughAV1Encodes - GUI for AV1 (aomenc, rav1e & svt-av1)
FFmpeg-Builds
ab-av1 - AV1 re-encoding using ffmpeg, svt-av1 & vmaf.
nmkoder - Media encoding, muxing, analysis toolkit for Windows
vmaf - Perceptual video quality assessment based on multi-method fusion.
FFmpeg-Builds - FFmpeg Builds for yt-dlp
PHP-FFmpeg-video-streaming - 📼 Package media content for online streaming(DASH and HLS) using FFmpeg
ffmpeg-quality-metrics - Calculate quality metrics with FFmpeg (SSIM, PSNR, VMAF, VIF)
caniuse - Raw browser/feature support data from caniuse.com