nodejs-audio-visualizer

Audio visualizer generator for Node.js with simple configuration.
Supports PNG, JPG for images and MP3, WAV for audio.

Example

``javascript
const renderAudioVisualizer = require('nodejs-audio-visualizer').renderAudioVisualizer;
const config = {
image: {
path: 'media/background.png' // Supports PNG and JPG images
},
audio: {
path: 'media/audio.wav' // Supports MP3 and WAV audio
},
outVideo: {
path: 'media/out.mp4',
fps: 25, // Default value: 30
spectrum: { // Audio spectrum configuration (linear bar visualizer). Optional. If neither 'spectrum' nor 'polar' is specified, 'polar' is used by default.
width: '30%', // 30% of background image width. Default value: 33%. Also you can use absolute values. For example, value 300 for 300 pixels width.
height: '15%', // 15% of background image height. Default value: 160. Also you can use absolute values. For example, value 300 for 300 pixels height.
x: 'center', // Available values: 'left', 'center', right'. Also you can use absolute number values. For example, value 300 for 300 pixels x.
y: 'bottom', // Available values: 'top', 'middle', bottom'. Also you can use absolute number values. For example, value 300 for 300 pixels y.
rotation: 'mirror', // Available values: 'up', 'down', 'mirror'. Default value: 'mirror'.
effect: 'volume', // Available values: 'volume', 'smooth', undefined. Default value: undefined.
color: '#cccc99', // Default value: inverted color of background image
opacity: '70%' // Default value: '80%'.
},
polar: { // Polar/circular audio spectrum configuration (DEFAULT). Optional. Use either 'spectrum' or 'polar', not both.
x: 'center', // Available values: 'left', 'center', 'right'. Also you can use absolute number values. Default value: 'center'.
y: 'middle', // Available values: 'top', 'middle', 'bottom'. Also you can use absolute number values. Default value: 'middle'.
innerRadius: 100, // Inner radius of the circular spectrum in pixels. Default value: 100.
maxBarLength: 160, // Maximum bar length in pixels. Default value: 160.
barWidth: 15, // Width of each bar in pixels. Default value: 15.
effect: 'volume', // Available values: 'volume', 'smooth', undefined. Default value: undefined.
color: '#cccc99', // Default value: inverted color of background image
opacity: '70%' // Default value: '80%'.
}
},
tweaks: { // Optional
ffmpeg_cfr: '30', // Default value: 23
ffmpeg_preset: 'ultrafast', // Default value: medium
frame_processing_delay: 1000 // Delay between processing frames in milliseconds
}
};

const onProgress = (progressPercent: number) => { // not necessary callback
console.log(progress: ${progressPercent} %);
};

let counter = 0;
const shouldStop = () => { // not necessary callback
if (counter > 5) {
return true;
}
counter++;
return false;
};

renderAudioVisualizer(config, onProgress, shouldStop)
.then((exitCode) => {
console.log(exited with code: ${exitCode});
});
``

Output preview

!frame of output video