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Node wave

Render audio waveform like SoundCloud on backend

Now we have 2 version 0.0.4 and 0.0.3

0.0.4: I used ffmpeg, It take less cpu and memory than version 0.0.3 but you need to install ffmpeg

Install

$ npm install node-wave

How to use

Use with express:

var Waveform = require('node-waveform')
var fs = require('fs')

Waveform('< mp3 link >', options, function(err , buffer) {
  fs.writeFileSync('out.png', buffer)
})

Requirement

This module base on web-audio-api and canvas modules. You need to install Cairo. Follow install canvas instructor https://www.npmjs.com/package/canvas

Attribute

Option Desciption Default
width Image width 600px
height Image height 80px
barWidth bar height 3px
barGrap space between 2 bar 0.2
waveColor bar color gray
waveAlpha bar opacity 1
backgroundColor Image background color #fff
backgroundImage setup image background
baseline center of waveform 40
padding Top and bottom padding 10
baselineWidth baseline width 1
baselineColor baseline color white

The MIT License (MIT)

Copyright (c) <2017> Tran Quoc Cuong

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.

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Nodejs waveform render

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