const { getAudioDurationInSeconds } = require('get-audio-duration')

// From a local path...
getAudioDurationInSeconds('audio.flac').then((duration) => {
  console.log(duration)
})

// From a readable stream...

const fs = require('fs')
const stream = fs.createReadStream('audio.flac')

getAudioDurationInSeconds(stream).then((duration) => {
  console.log(duration)
})

// If you need to customize the path to ffprobe...

getAudioDurationInSeconds('audio.flac', '/path/to/ffprobe').then((duration) => {
  console.log(duration)
})