chungy / ab-av1

AV1 re-encoding using ffmpeg, svt-av1 & vmaf.

ab-av1

AV1 encoding tool with fast VMAF sampling. Uses svt-av1, ffmpeg & vmaf.

Command: auto-encode

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

Two phases:

• crf-search to determine the best --crf value
• ffmpeg & SvtAv1EncApp to encode using the settings

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

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>

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>

Command: encode

Simple invocation of ffmpeg & SvtAv1EncApp to encode a video.

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

Command: vmaf

Simple full calculation of VMAF score distorted file vs reference file.

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

Install

Arch Linux

Available in the AUR.

Using cargo

Latest release

cargo install ab-av1

Latest code direct from git

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

Requirements

• svt-av1
• ffmpeg
• vmaf
• opus

ffmpeg, SvtAv1EncApp commands should be in $PATH.

Minimum supported rust compiler

Maintained with latest stable rust.