cavif-bin

cavif bin-wrapper that makes it seamlessly available as a local dependency

I hope that this package will be part of the imagemin plugins as an imagemin-avif WIP

About AVIF

AVIF offers significant compression gains vs. JPEG and WebP, with a recent Netflix study showing 50% savings vs. standard JPEG and > 60% savings on 4:4:4 content

Underhood

cavif-bin use cavif v0.6.6 with BSD 3-Clause License and Copyright (c) 2020, Kornel, as a AVIF coder.

Encoder options

| Option | Description | | ------ | ----------- | | --quality=n | Quality from 1 (worst) to 100 (best), the default value is 80. The numbers have different meaning than JPEG's quality scale. Beware when comparing codecs. | | --speed=n | Encoding speed between 1 (best, but slowest) and 10 (fastest, but a blurry mess), the default value is 1. Encoding of AVIF is pretty slow, so you need either a) beefy multicore machine b) avoid large images c) patience. | | --overwrite | Replace files if there's .avif already. By default existing files are left untouched. | -o path | Write output to this path instead of samefile.avif. If multiple input files are specified, it's interpreted as a directory. | | --quiet | Don't print anything during conversion. | | --premultiplied-alpha | Warning: currently incompatible with libavif. Improves compression of transparent images by clearing RGB of fully transparent pixels and lowering quality of semi-transparent colors. | | --dirty-alpha | Don't change RGB values of transparent pixels. By default irrelevant color of transparent pixels is cleared to avoid wasting space. | | --color=rgb | encode using RGB color space instead of YCbCr color space. Makes color closer to lossless, but makes files larger. |

Install

npm install cavif-bin

Usage

const {execFile} = require('child_process');
const cavif = require('cavif-bin');

execFile(cavif, ['input.png','--quality=74', '-o', 'output.avif'], err => {
  if (err) throw err;
  console.log('Image is converted!');
});

CLI

You can install cavif globally.

npm install --global cavif-bin

And use it as a CLI command.

cavif --help

AVIF browsers support

• Chrome Desktop 85+
• Firefox 63+ (with media.av1.enabled activated)
• Firefox for Android 64+ (with media.av1.enabled and media.av1.use-dav1d activated)
• Edge 18+ (with AV1 Video Extension installed)

License

MIT © nucliweb