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>
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
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.
- Converts distorted & reference to appropriate format yuv streams before passing to vmaf.
ab-av1 vmaf --reference <REFERENCE> --distorted <DISTORTED>
Install
Arch Linux
Available in the AUR.
Windows
Pre-built ab-av1.exe included in the latest release.
Using cargo
Latest release
cargo install ab-av1Latest code direct from git
cargo install --git https://github.com/alexheretic/ab-av1Requirements
ffmpeg newer than git-2022-02-24 with libsvtav1, libvmaf, libopus enabled.
ffmpeg should be in $PATH.
Minimum supported rust compiler
Maintained with latest stable rust.