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)

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.