Av1an is a video encoding framework. It can increase your encoding speed and improve cpu utilization by running multiple encoder processes in parallel. Target quality, VMAF plotting, and more, available to take advantage for video encoding.

• Hyper-scalable video encoding
• Target Quality mode, using VMAF control encoders rate control to achieve the desired video quality
• VapourSynth script support
• Cancel and resume encoding without loss of progress
• Minimal and clean CLI
• Docker images available
• Cross-platform application written in Rust

For complete reference, refer to CLI or run av1an --help

Encode a video file with the default parameters:

av1an -i input.mkv

Or use a VapourSynth script and custom parameters:

av1an -i input.vpy -v "--cpu-used=3 --end-usage=q --cq-level=30 --threads=8" -w 10 --target-quality 95 -a "-c:a libopus -ac 2 -b:a 192k" -l my_log -o output.mkv

At least one encoder is required to use Av1an. The following encoders are supported:

• aomenc (AV1)
• SvtAv1EncApp (AV1)
• rav1e (AV1)
• vpxenc (VP8 and VP9)
• x264 (H.264/AVC)
• x265 (H.265/HEVC)

Note that Av1an requires the executable encoder. If you use a package manager to install encoders, check that the installation includes an executable encoder (e.g. vpxenc, SvtAv1EncApp) from the list above. Just installing the library (e.g. libvpx, libSvtAv1Enc) is not enough.

av1an can be installed from package managers, cargo.io, or compliled manually. There are also pre-built Docker images which include all dependencies and are frequently updated.

For Windows users, prebuilt binaries are also included in every release, and a nightly build of the current master branch is also available.

Arch Linux & Manjaro: pacman -S av1an Cargo: cargo install av1an

Prerequisites:

• FFmpeg
• VapourSynth
• At least one encoder

Optional:

• L-SMASH VapourSynth plugin for better chunking (recommended)
• ffms2 VapourSynth plugin for better chunking
• mkvmerge to use mkvmerge instead of FFmpeg for file concatenation
• VMAF to calculate VMAF scores and to use target quality mode

If you want to install the L-SMASH or ffms2 plugins and are on Windows, then you have two installation options. The easiest way is using the included plugin script:

1. Open your VapourSynth installation directory
2. Open a command prompt or PowerShell window via Shift + Right click
3. Run python3 vsrepo.py install lsmas ffms2

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