audiobookshelf/server/utils/downloadWorker.js

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const Ffmpeg = require('fluent-ffmpeg')
if (process.env.NODE_ENV !== 'production') {
Ffmpeg.setFfmpegPath(process.env.FFMPEG_PATH)
}
const { parentPort, workerData } = require("worker_threads")
const Logger = require('../Logger')
Logger.info('[DownloadWorker] Starting Worker...')
const ffmpegCommand = Ffmpeg()
const startTime = Date.now()
workerData.inputs.forEach((inputData) => {
ffmpegCommand.input(inputData.input)
if (inputData.options) ffmpegCommand.inputOption(inputData.options)
})
if (workerData.options) ffmpegCommand.addOption(workerData.options)
ffmpegCommand.output(workerData.output)
var isKilled = false
async function runFfmpeg() {
var success = await new Promise((resolve) => {
ffmpegCommand.on('start', (command) => {
Logger.info('[DownloadWorker] FFMPEG concat started with command: ' + command)
})
ffmpegCommand.on('stderr', (stdErrline) => {
Logger.info(stdErrline)
})
ffmpegCommand.on('error', (err, stdout, stderr) => {
if (err.message && err.message.includes('SIGKILL')) {
// This is an intentional SIGKILL
Logger.info('[DownloadWorker] User Killed singleAudio')
} else {
Logger.error('[DownloadWorker] Ffmpeg Err', err.message)
}
resolve(false)
})
ffmpegCommand.on('end', (stdout, stderr) => {
Logger.info('[DownloadWorker] singleAudio ended')
resolve(true)
})
ffmpegCommand.run()
})
var resultMessage = {
type: 'RESULT',
isKilled,
elapsed: Date.now() - startTime,
success
}
parentPort.postMessage(resultMessage)
}
parentPort.on('message', (message) => {
if (message === 'STOP') {
Logger.info('[DownloadWorker] Requested a hard stop')
isKilled = true
ffmpegCommand.kill()
}
})
runFfmpeg()