ab-av1 for Mac

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

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

Notable options --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

Notable options --xpsnr specifies calculation of XPSNR score instead of VMAF.

Command: encode Invoke ffmpeg to encode a video or image.

Notable options These also apply to auto-encode. --verify checks the finished encode before it is moved into place: decodes it in full failing on decode errors (--verify-decode) & fails if its duration does not match the input within 2s (--verify-duration). Either check can be enabled on its own. The encoder can otherwise exit successfully having written a damaged or cut short result, e.g. from a truncated input. --fail-fast stops the encode at the first ffmpeg reported error instead of writing a damaged result.

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.

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

JSON output See --stdout-format json docs.

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

Latest code direct from git

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.

Minimum supported rust compiler Maintained with latest stable rust.