gif2webp

A GIF to WebP converter for NodeJS using Google's gif2webp example.

Usage

var gif2webp = require ("gif2webp");
var fs = require ("fs");

var buffer = fs.readFileSync ("some.gif");
var options = {
    source: buffer,
    lossy: true
};

gif2webp.convert (options, function (error, buffer) {
  // do something with the WebP buffer.
};

convert (options, callback)

The first argument is an options object. The only required option is source, this should be a Buffer containing the gif data; all others are optional.

• source - The gif Buffer.
• lossy - Encode image using lossy compression Boolean.
• mixed - For each frame in the image, pick lossy or lossless compression heuristically Boolean.
• quality - Quality factor (0:small..100:big).
• method - Compression method Quality (0=fast, 6=slowest).
• kmin - Min distance between key frames.
• kmax - Max distance between key frames.
• filter - Filter strength (0=off..100).
• metadata - Comma separated list of metadata to copy from the input to the output if present. Valid values: all, none, icc, xmp (default) String.
• mt - Use multi-threading if available Boolean.
• verbose - Verbose output Boolean.

For more info on the options listed above please vist the gif2webp page.

The callback argument gets 2 arguments:

1. An error when applicable.
2. An Buffer object containing the WebP data.

Installation

First downlaod and install GIFLIB 4.2.x. Then downlaod and install WebP. If you are installing WebP form source then take a look here and don't forget to use --enable-libwebpmux during the configure process, this is needed for gif conversion.

$ npm install gif2webp

License

The MIT License (MIT)

Copyright (c) 2014 Jacob Sologub

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

WebP Source License

The WebP source is governed by a BSD-style license that can be found in the COPYING file in the root of the source tree. An additional intellectual property rights grant can be found in the file PATENTS. All contributing project authors may be found in the AUTHORS file in the root of the source tree.