node-mozjpeg

mozjpeg node binding

Features

• for a 10MB jpeg file, 2x fast than squoosh or @saschazar/wasm-mozjpeg wasm version.
• None blocking mozjpeg compress. (u should wrap wasm version it in a WebWorker or node.js Worker)

Install

$ npm i -S node-mozjpeg

API

const mozjpeg = require('node-mozjpeg')

types

export const version: string

export enum ColorSpace {
  GRAYSCALE = 1,
  RGB,
  YCbCr,
}

export interface EncodeOptions {
  quality: number
  baseline: boolean
  arithmetic: boolean
  progressive: boolean
  optimize_coding: boolean
  smoothing: number
  color_space: ColorSpace
  quant_table: number
  trellis_multipass: boolean
  trellis_opt_zero: boolean
  trellis_opt_table: boolean
  trellis_loops: number
  auto_subsample: boolean
  chroma_subsample: number
  separate_chroma_quality: boolean
  chroma_quality: number
}

encodeSync

this will block the EventLoop, do not use in production

export function encodeSync(input: Buffer, width: number, height: number, options?: Partial<EncodeOptions>): Buffer

encode

same as encodeSync except it's using libuv to encode and return Promise

export function encode(input: Buffer, width: number, height: number, options?: Partial<EncodeOptions>): Promise<Buffer>

defaultOptions

const defaultOptions = {
  quality: 75,
  baseline: false,
  arithmetic: false,
  progressive: true,
  optimize_coding: true,
  smoothing: 0,
  color_space: ColorSpace.YCbCr,
  quant_table: 3,
  trellis_multipass: false,
  trellis_opt_zero: false,
  trellis_opt_table: false,
  trellis_loops: 1,
  auto_subsample: true,
  chroma_subsample: 2,
  separate_chroma_quality: false,
  chroma_quality: 75,
}

Changelog

CHANGELOG.md

License

the MIT License LICENSE