Abysim / node-dwebp-bin

dwebp node.js wrapper that decode WebP to PNG.

node-dwebp-bin

Dependencies on Linux

WebP requires following libraries on Linux. See detail.

$ sudo apt-get install libjpeg-dev libpng-dev libtiff-dev libgif-dev

Install

$ npm install --save dwebp-bin

Usage

Command Line

$ dwebp input.webp -o output.png

From source file

var execFile = require('child_process').execFile;
var dwebp = require('dwebp-bin').path;

execFile(dwebp, ['input.webp', '-o', 'output.png'], function (error) {
  if (error) {
    throw error;
  }

  console.log('Image was converted');
});

Options

Usage: dwebp in_file [options] [-o out_file]

Decodes the WebP image file to PNG format [Default]
Use following options to convert into alternate image formats:
  -pam ......... save the raw RGBA samples as a color PAM
  -ppm ......... save the raw RGB samples as a color PPM
  -bmp ......... save as uncompressed BMP format
  -tiff ........ save as uncompressed TIFF format
  -pgm ......... save the raw YUV samples as a grayscale PGM
                 file with IMC4 layout
  -yuv ......... save the raw YUV samples in flat layout

 Other options are:
  -version  .... print version number and exit
  -nofancy ..... don't use the fancy YUV420 upscaler
  -nofilter .... disable in-loop filtering
  -nodither .... disable dithering
  -dither <d> .. dithering strength (in 0..100)
  -mt .......... use multi-threading
  -crop <x> <y> <w> <h> ... crop output with the given rectangle
  -scale <w> <h> .......... scale the output (*after* any cropping)
  -flip ........ flip the output vertically
  -alpha ....... only save the alpha plane
  -incremental . use incremental decoding (useful for tests)
  -h     ....... this help message
  -v     ....... verbose (e.g. print encoding/decoding times)
  -noasm ....... disable all assembly optimizations

License

This is licensed under BSD.

WebP is licensed under Creative Commons Attribution 3.0 License.