ab-av1

Crates.ioab-av1
lib.rsab-av1
version
sourcesrc
created_at2022-02-03 21:45:52.780206+00
updated_at2025-03-14 19:48:58.882088+00
descriptionAV1 encoding with fast VMAF sampling
homepage
repositoryhttps://github.com/alexheretic/ab-av1
max_upload_size
id526428
Cargo.toml error:TOML parse error at line 18, column 1 | 18 | autolib = false | ^^^^^^^ unknown field `autolib`, expected one of `name`, `version`, `edition`, `authors`, `description`, `readme`, `license`, `repository`, `homepage`, `documentation`, `build`, `resolver`, `links`, `default-run`, `default_dash_run`, `rust-version`, `rust_dash_version`, `rust_version`, `license-file`, `license_dash_file`, `license_file`, `licenseFile`, `license_capital_file`, `forced-target`, `forced_dash_target`, `autobins`, `autotests`, `autoexamples`, `autobenches`, `publish`, `metadata`, `keywords`, `categories`, `exclude`, `include`
size0
Alex Butler (alexheretic)

documentation

README

ab-av1

AV1 video encoding tool with fast VMAF sampling & automatic encoder crf calculation. Uses ffmpeg, svt-av1 & vmaf.

Also supports other ffmpeg compatible encoders like libx265 & libx264.

Command: auto-encode

Automatically determine the best crf to deliver the --min-vmaf and use it to encode a video or image.

Two phases:

  • crf-search to determine the best --crf value
  • ffmpeg to encode using the settings
ab-av1 auto-encode [OPTIONS] -i <INPUT> --preset <PRESET> --min-vmaf <MIN_VMAF>

Command: crf-search

Interpolated binary search using sample-encode to find the best crf value delivering --min-vmaf & --max-encoded-percent.

Outputs:

  • Best crf value
  • Mean sample VMAF score
  • Predicted full encode size
  • Predicted full encode time
ab-av1 crf-search [OPTIONS] -i <INPUT> --preset <PRESET> --min-vmaf <MIN_VMAF>

Notable options

  • --min-xpsnr <MIN_XPSNR> may be used as an alternative to VMAF.

Command: sample-encode

Encode short video samples of an input using provided crf & preset. This is much quicker than full encode/vmaf run.

Outputs:

  • Mean sample VMAF score
  • Predicted full encode size
  • Predicted full encode time
ab-av1 sample-encode [OPTIONS] -i <INPUT> --crf <CRF> --preset <PRESET>

Notable options

  • --xpsnr specifies calculation of XPSNR score instead of VMAF.

Command: encode

Invoke ffmpeg to encode a video or image.

ab-av1 encode [OPTIONS] -i <INPUT> --crf <CRF> --preset <PRESET>

Command: vmaf

Full VMAF score calculation, distorted file vs reference file. Works with videos and images.

  • Auto sets model version (4k or 1k) according to resolution.
  • Auto sets n_threads to system threads.
  • Auto upscales lower resolution videos to the model.
ab-av1 vmaf --reference <REFERENCE> --distorted <DISTORTED>

Command: xpsnr

Full XPSNR score calculation, distorted file vs reference file. Works with videos and images.

ab-av1 xpsnr --reference <REFERENCE> --distorted <DISTORTED>

Install

Arch Linux

Available in the AUR.

Linux

Pre-built statically linked x86_64-unknown-linux-musl binary included in the latest release.

Windows

Pre-built ab-av1.exe included in the latest release.

Using cargo

Latest release

cargo install ab-av1

Latest code direct from git

cargo install --git https://github.com/alexheretic/ab-av1

Requirements

ffmpeg newer than git-2022-02-24 with libsvtav1, libvmaf, libopus enabled.

ffmpeg should be in $PATH.

Debug

Enable debug logs by setting env var RUST_LOG=ab_av1=debug. This includes all ffmpeg calls.

$ RUST_LOG=ab_av1=debug ab-av1 auto-encode -i vid.mkv

Minimum supported rust compiler

Maintained with latest stable rust.

Commit count: 269

cargo fmt