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
$ npm install node-wave
Use with express:
var Waveform = require('node-waveform')
var fs = require('fs')
Waveform('< mp3 link >', options, function(err , buffer) {
fs.writeFileSync('out.png', buffer)
})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
| 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 |
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.