client/src/assets/player/shared/webtorrent/webtorrent-plugin.ts

   1 import videojs from 'video.js'
   2 import * as WebTorrent from 'webtorrent'
   3 import { logger } from '@root-helpers/logger'
   4 import { isIOS } from '@root-helpers/web-browser'
   5 import { addQueryParams, timeToInt } from '@shared/core-utils'
   6 import { VideoFile } from '@shared/models'
   7 import { getAverageBandwidthInStore, getStoredMute, getStoredVolume, saveAverageBandwidth } from '../../peertube-player-local-storage'
   8 import { PeerTubeResolution, PlayerNetworkInfo, WebtorrentPluginOptions } from '../../types'
   9 import { getRtcConfig, videoFileMaxByResolution, videoFileMinByResolution } from '../common'
  10 import { PeertubeChunkStore } from './peertube-chunk-store'
  11 import { renderVideo } from './video-renderer'
  12
  13 const CacheChunkStore = require('cache-chunk-store')
  14
  15 type PlayOptions = {
  16   forcePlay?: boolean
  17   seek?: number
  18   delay?: number
  19 }
  20
  21 const Plugin = videojs.getPlugin('plugin')
  22
  23 class WebTorrentPlugin extends Plugin {
  24   readonly videoFiles: VideoFile[]
  25
  26   private readonly playerElement: HTMLVideoElement
  27
  28   private readonly autoplay: boolean | string = false
  29   private readonly startTime: number = 0
  30   private readonly savePlayerSrcFunction: videojs.Player['src']
  31   private readonly videoDuration: number
  32   private readonly CONSTANTS = {
  33     INFO_SCHEDULER: 1000, // Don't change this
  34     AUTO_QUALITY_SCHEDULER: 3000, // Check quality every 3 seconds
  35     AUTO_QUALITY_THRESHOLD_PERCENT: 30, // Bandwidth should be 30% more important than a resolution bitrate to change to it
  36     AUTO_QUALITY_OBSERVATION_TIME: 10000, // Wait 10 seconds after having change the resolution before another check
  37     AUTO_QUALITY_HIGHER_RESOLUTION_DELAY: 5000, // Buffering higher resolution during 5 seconds
  38     BANDWIDTH_AVERAGE_NUMBER_OF_VALUES: 5 // Last 5 seconds to build average bandwidth
  39   }
  40
  41   private readonly buildWebSeedUrls: (file: VideoFile) => string[]
  42
  43   private readonly webtorrent = new WebTorrent({
  44     tracker: {
  45       rtcConfig: getRtcConfig()
  46     },
  47     dht: false
  48   })
  49
  50   private currentVideoFile: VideoFile
  51   private torrent: WebTorrent.Torrent
  52
  53   private renderer: any
  54   private fakeRenderer: any
  55   private destroyingFakeRenderer = false
  56
  57   private autoResolution = true
  58   private autoResolutionPossible = true
  59   private isAutoResolutionObservation = false
  60   private playerRefusedP2P = false
  61
  62   private requiresAuth: boolean
  63   private videoFileToken: () => string
  64
  65   private torrentInfoInterval: any
  66   private autoQualityInterval: any
  67   private addTorrentDelay: any
  68   private qualityObservationTimer: any
  69   private runAutoQualitySchedulerTimer: any
  70
  71   private downloadSpeeds: number[] = []
  72
  73   constructor (player: videojs.Player, options?: WebtorrentPluginOptions) {
  74     super(player)
  75
  76     this.startTime = timeToInt(options.startTime)
  77
  78     // Custom autoplay handled by webtorrent because we lazy play the video
  79     this.autoplay = options.autoplay
  80
  81     this.playerRefusedP2P = options.playerRefusedP2P
  82
  83     this.videoFiles = options.videoFiles
  84     this.videoDuration = options.videoDuration
  85
  86     this.savePlayerSrcFunction = this.player.src
  87     this.playerElement = options.playerElement
  88
  89     this.requiresAuth = options.requiresAuth
  90     this.videoFileToken = options.videoFileToken
  91
  92     this.buildWebSeedUrls = options.buildWebSeedUrls
  93
  94     this.player.ready(() => {
  95       const playerOptions = this.player.options_
  96
  97       const volume = getStoredVolume()
  98       if (volume !== undefined) this.player.volume(volume)
  99
 100       const muted = playerOptions.muted !== undefined ? playerOptions.muted : getStoredMute()
 101       if (muted !== undefined) this.player.muted(muted)
 102
 103       this.player.duration(options.videoDuration)
 104
 105       this.initializePlayer()
 106       this.runTorrentInfoScheduler()
 107
 108       this.player.one('play', () => {
 109         // Don't run immediately scheduler, wait some seconds the TCP connections are made
 110         this.runAutoQualitySchedulerTimer = setTimeout(() => this.runAutoQualityScheduler(), this.CONSTANTS.AUTO_QUALITY_SCHEDULER)
 111       })
 112     })
 113   }
 114
 115   dispose () {
 116     clearTimeout(this.addTorrentDelay)
 117     clearTimeout(this.qualityObservationTimer)
 118     clearTimeout(this.runAutoQualitySchedulerTimer)
 119
 120     clearInterval(this.torrentInfoInterval)
 121     clearInterval(this.autoQualityInterval)
 122
 123     // Don't need to destroy renderer, video player will be destroyed
 124     this.flushVideoFile(this.currentVideoFile, false)
 125
 126     this.destroyFakeRenderer()
 127   }
 128
 129   getCurrentResolutionId () {
 130     return this.currentVideoFile ? this.currentVideoFile.resolution.id : -1
 131   }
 132
 133   updateVideoFile (
 134     videoFile?: VideoFile,
 135     options: {
 136       forcePlay?: boolean
 137       seek?: number
 138       delay?: number
 139     } = {},
 140     done: () => void = () => { /* empty */ }
 141   ) {
 142     // Automatically choose the adapted video file
 143     if (!videoFile) {
 144       const savedAverageBandwidth = getAverageBandwidthInStore()
 145       videoFile = savedAverageBandwidth
 146         ? this.getAppropriateFile(savedAverageBandwidth)
 147         : this.pickAverageVideoFile()
 148     }
 149
 150     if (!videoFile) {
 151       throw Error(`Can't update video file since videoFile is undefined.`)
 152     }
 153
 154     // Don't add the same video file once again
 155     if (this.currentVideoFile !== undefined && this.currentVideoFile.magnetUri === videoFile.magnetUri) {
 156       return
 157     }
 158
 159     // Do not display error to user because we will have multiple fallback
 160     this.player.peertube().hideFatalError();
 161
 162     // Hack to "simulate" src link in video.js >= 6
 163     // Without this, we can't play the video after pausing it
 164     // https://github.com/videojs/video.js/blob/master/src/js/player.js#L1633
 165     (this.player as any).src = () => true
 166     const oldPlaybackRate = this.player.playbackRate()
 167
 168     const previousVideoFile = this.currentVideoFile
 169     this.currentVideoFile = videoFile
 170
 171     // Don't try on iOS that does not support MediaSource
 172     // Or don't use P2P if webtorrent is disabled
 173     if (isIOS() || this.playerRefusedP2P) {
 174       return this.fallbackToHttp(options, () => {
 175         this.player.playbackRate(oldPlaybackRate)
 176         return done()
 177       })
 178     }
 179
 180     this.addTorrent(this.currentVideoFile.magnetUri, previousVideoFile, options, () => {
 181       this.player.playbackRate(oldPlaybackRate)
 182       return done()
 183     })
 184
 185     this.selectAppropriateResolution(true)
 186   }
 187
 188   updateEngineResolution (resolutionId: number, delay = 0) {
 189     // Remember player state
 190     const currentTime = this.player.currentTime()
 191     const isPaused = this.player.paused()
 192
 193     // Hide bigPlayButton
 194     if (!isPaused) {
 195       this.player.bigPlayButton.hide()
 196     }
 197
 198     // Audio-only (resolutionId === 0) gets special treatment
 199     if (resolutionId === 0) {
 200       // Audio-only: show poster, do not auto-hide controls
 201       this.player.addClass('vjs-playing-audio-only-content')
 202       this.player.posterImage.show()
 203     } else {
 204       // Hide poster to have black background
 205       this.player.removeClass('vjs-playing-audio-only-content')
 206       this.player.posterImage.hide()
 207     }
 208
 209     const newVideoFile = this.videoFiles.find(f => f.resolution.id === resolutionId)
 210     const options = {
 211       forcePlay: false,
 212       delay,
 213       seek: currentTime + (delay / 1000)
 214     }
 215
 216     this.updateVideoFile(newVideoFile, options)
 217
 218     this.player.trigger('engineResolutionChange')
 219   }
 220
 221   flushVideoFile (videoFile: VideoFile, destroyRenderer = true) {
 222     if (videoFile !== undefined && this.webtorrent.get(videoFile.magnetUri)) {
 223       if (destroyRenderer === true && this.renderer && this.renderer.destroy) this.renderer.destroy()
 224
 225       this.webtorrent.remove(videoFile.magnetUri)
 226       logger.info(`Removed ${videoFile.magnetUri}`)
 227     }
 228   }
 229
 230   disableAutoResolution () {
 231     this.autoResolution = false
 232     this.autoResolutionPossible = false
 233     this.player.peertubeResolutions().disableAutoResolution()
 234   }
 235
 236   isAutoResolutionPossible () {
 237     return this.autoResolutionPossible
 238   }
 239
 240   getTorrent () {
 241     return this.torrent
 242   }
 243
 244   getCurrentVideoFile () {
 245     return this.currentVideoFile
 246   }
 247
 248   changeQuality (id: number) {
 249     if (id === -1) {
 250       if (this.autoResolutionPossible === true) {
 251         this.autoResolution = true
 252
 253         this.selectAppropriateResolution(false)
 254       }
 255
 256       return
 257     }
 258
 259     this.autoResolution = false
 260     this.updateEngineResolution(id)
 261     this.selectAppropriateResolution(false)
 262   }
 263
 264   private addTorrent (
 265     magnetOrTorrentUrl: string,
 266     previousVideoFile: VideoFile,
 267     options: PlayOptions,
 268     done: (err?: Error) => void
 269   ) {
 270     if (!magnetOrTorrentUrl) return this.fallbackToHttp(options, done)
 271
 272     logger.info(`Adding ${magnetOrTorrentUrl}.`)
 273
 274     const oldTorrent = this.torrent
 275     const torrentOptions = {
 276       // Don't use arrow function: it breaks webtorrent (that uses `new` keyword)
 277       store: function (chunkLength: number, storeOpts: any) {
 278         return new CacheChunkStore(new PeertubeChunkStore(chunkLength, storeOpts), {
 279           max: 100
 280         })
 281       },
 282       urlList: this.buildWebSeedUrls(this.currentVideoFile)
 283     }
 284
 285     this.torrent = this.webtorrent.add(magnetOrTorrentUrl, torrentOptions, torrent => {
 286       logger.info(`Added ${magnetOrTorrentUrl}.`)
 287
 288       if (oldTorrent) {
 289         // Pause the old torrent
 290         this.stopTorrent(oldTorrent)
 291
 292         // We use a fake renderer so we download correct pieces of the next file
 293         if (options.delay) this.renderFileInFakeElement(torrent.files[0], options.delay)
 294       }
 295
 296       // Render the video in a few seconds? (on resolution change for example, we wait some seconds of the new video resolution)
 297       this.addTorrentDelay = setTimeout(() => {
 298         // We don't need the fake renderer anymore
 299         this.destroyFakeRenderer()
 300
 301         const paused = this.player.paused()
 302
 303         this.flushVideoFile(previousVideoFile)
 304
 305         // Update progress bar (just for the UI), do not wait rendering
 306         if (options.seek) this.player.currentTime(options.seek)
 307
 308         const renderVideoOptions = { autoplay: false, controls: true }
 309         renderVideo(torrent.files[0], this.playerElement, renderVideoOptions, (err, renderer) => {
 310           this.renderer = renderer
 311
 312           if (err) return this.fallbackToHttp(options, done)
 313
 314           return this.tryToPlay(err => {
 315             if (err) return done(err)
 316
 317             if (options.seek) this.seek(options.seek)
 318             if (options.forcePlay === false && paused === true) this.player.pause()
 319
 320             return done()
 321           })
 322         })
 323       }, options.delay || 0)
 324     })
 325
 326     this.torrent.on('error', (err: any) => logger.error(err))
 327
 328     this.torrent.on('warning', (err: any) => {
 329       // We don't support HTTP tracker but we don't care -> we use the web socket tracker
 330       if (err.message.indexOf('Unsupported tracker protocol') !== -1) return
 331
 332       // Users don't care about issues with WebRTC, but developers do so log it in the console
 333       if (err.message.indexOf('Ice connection failed') !== -1) {
 334         logger.info(err)
 335         return
 336       }
 337
 338       // Magnet hash is not up to date with the torrent file, add directly the torrent file
 339       if (err.message.indexOf('incorrect info hash') !== -1) {
 340         logger.error('Incorrect info hash detected, falling back to torrent file.')
 341         const newOptions = { forcePlay: true, seek: options.seek }
 342         return this.addTorrent(this.torrent['xs'], previousVideoFile, newOptions, done)
 343       }
 344
 345       // Remote instance is down
 346       if (err.message.indexOf('from xs param') !== -1) {
 347         this.handleError(err)
 348       }
 349
 350       logger.warn(err)
 351     })
 352   }
 353
 354   private tryToPlay (done?: (err?: Error) => void) {
 355     if (!done) done = function () { /* empty */ }
 356
 357     const playPromise = this.player.play()
 358     if (playPromise !== undefined) {
 359       return playPromise.then(() => done())
 360                         .catch((err: Error) => {
 361                           if (err.message.includes('The play() request was interrupted by a call to pause()')) {
 362                             return
 363                           }
 364
 365                           logger.warn(err)
 366                           this.player.pause()
 367                           this.player.posterImage.show()
 368                           this.player.removeClass('vjs-has-autoplay')
 369                           this.player.removeClass('vjs-has-big-play-button-clicked')
 370                           this.player.removeClass('vjs-playing-audio-only-content')
 371
 372                           return done()
 373                         })
 374     }
 375
 376     return done()
 377   }
 378
 379   private seek (time: number) {
 380     this.player.currentTime(time)
 381     this.player.handleTechSeeked_()
 382   }
 383
 384   private getAppropriateFile (averageDownloadSpeed?: number): VideoFile {
 385     if (this.videoFiles === undefined) return undefined
 386     if (this.videoFiles.length === 1) return this.videoFiles[0]
 387
 388     const files = this.videoFiles.filter(f => f.resolution.id !== 0)
 389     if (files.length === 0) return undefined
 390
 391     // Don't change the torrent if the player ended
 392     if (this.torrent && this.torrent.progress === 1 && this.player.ended()) return this.currentVideoFile
 393
 394     if (!averageDownloadSpeed) averageDownloadSpeed = this.getAndSaveActualDownloadSpeed()
 395
 396     // Limit resolution according to player height
 397     const playerHeight = this.playerElement.offsetHeight
 398
 399     // We take the first resolution just above the player height
 400     // Example: player height is 530px, we want the 720p file instead of 480p
 401     let maxResolution = files[0].resolution.id
 402     for (let i = files.length - 1; i >= 0; i--) {
 403       const resolutionId = files[i].resolution.id
 404       if (resolutionId !== 0 && resolutionId >= playerHeight) {
 405         maxResolution = resolutionId
 406         break
 407       }
 408     }
 409
 410     // Filter videos we can play according to our screen resolution and bandwidth
 411     const filteredFiles = files.filter(f => f.resolution.id <= maxResolution)
 412                                .filter(f => {
 413                                  const fileBitrate = (f.size / this.videoDuration)
 414                                  let threshold = fileBitrate
 415
 416                                  // If this is for a higher resolution or an initial load: add a margin
 417                                  if (!this.currentVideoFile || f.resolution.id > this.currentVideoFile.resolution.id) {
 418                                    threshold += ((fileBitrate * this.CONSTANTS.AUTO_QUALITY_THRESHOLD_PERCENT) / 100)
 419                                  }
 420
 421                                  return averageDownloadSpeed > threshold
 422                                })
 423
 424     // If the download speed is too bad, return the lowest resolution we have
 425     if (filteredFiles.length === 0) return videoFileMinByResolution(files)
 426
 427     return videoFileMaxByResolution(filteredFiles)
 428   }
 429
 430   private getAndSaveActualDownloadSpeed () {
 431     const start = Math.max(this.downloadSpeeds.length - this.CONSTANTS.BANDWIDTH_AVERAGE_NUMBER_OF_VALUES, 0)
 432     const lastDownloadSpeeds = this.downloadSpeeds.slice(start, this.downloadSpeeds.length)
 433     if (lastDownloadSpeeds.length === 0) return -1
 434
 435     const sum = lastDownloadSpeeds.reduce((a, b) => a + b)
 436     const averageBandwidth = Math.round(sum / lastDownloadSpeeds.length)
 437
 438     // Save the average bandwidth for future use
 439     saveAverageBandwidth(averageBandwidth)
 440
 441     return averageBandwidth
 442   }
 443
 444   private initializePlayer () {
 445     this.buildQualities()
 446
 447     if (this.videoFiles.length === 0) {
 448       this.player.addClass('disabled')
 449       return
 450     }
 451
 452     if (this.autoplay !== false) {
 453       this.player.posterImage.hide()
 454
 455       return this.updateVideoFile(undefined, { forcePlay: true, seek: this.startTime })
 456     }
 457
 458     // Proxy first play
 459     const oldPlay = this.player.play.bind(this.player);
 460     (this.player as any).play = () => {
 461       this.player.addClass('vjs-has-big-play-button-clicked')
 462       this.player.play = oldPlay
 463
 464       this.updateVideoFile(undefined, { forcePlay: true, seek: this.startTime })
 465     }
 466   }
 467
 468   private runAutoQualityScheduler () {
 469     this.autoQualityInterval = setInterval(() => {
 470
 471       // Not initialized or in HTTP fallback
 472       if (this.torrent === undefined || this.torrent === null) return
 473       if (this.autoResolution === false) return
 474       if (this.isAutoResolutionObservation === true) return
 475
 476       const file = this.getAppropriateFile()
 477       let changeResolution = false
 478       let changeResolutionDelay = 0
 479
 480       // Lower resolution
 481       if (this.isPlayerWaiting() && file.resolution.id < this.currentVideoFile.resolution.id) {
 482         logger.info(`Downgrading automatically the resolution to: ${file.resolution.label}`)
 483         changeResolution = true
 484       } else if (file.resolution.id > this.currentVideoFile.resolution.id) { // Higher resolution
 485         logger.info(`Upgrading automatically the resolution to: ${file.resolution.label}`)
 486         changeResolution = true
 487         changeResolutionDelay = this.CONSTANTS.AUTO_QUALITY_HIGHER_RESOLUTION_DELAY
 488       }
 489
 490       if (changeResolution === true) {
 491         this.updateEngineResolution(file.resolution.id, changeResolutionDelay)
 492
 493         // Wait some seconds in observation of our new resolution
 494         this.isAutoResolutionObservation = true
 495
 496         this.qualityObservationTimer = setTimeout(() => {
 497           this.isAutoResolutionObservation = false
 498         }, this.CONSTANTS.AUTO_QUALITY_OBSERVATION_TIME)
 499       }
 500     }, this.CONSTANTS.AUTO_QUALITY_SCHEDULER)
 501   }
 502
 503   private isPlayerWaiting () {
 504     return this.player?.hasClass('vjs-waiting')
 505   }
 506
 507   private runTorrentInfoScheduler () {
 508     this.torrentInfoInterval = setInterval(() => {
 509       // Not initialized yet
 510       if (this.torrent === undefined) return
 511
 512       // Http fallback
 513       if (this.torrent === null) return this.player.trigger('p2pInfo', false)
 514
 515       // this.webtorrent.downloadSpeed because we need to take into account the potential old torrent too
 516       if (this.webtorrent.downloadSpeed !== 0) this.downloadSpeeds.push(this.webtorrent.downloadSpeed)
 517
 518       return this.player.trigger('p2pInfo', {
 519         source: 'webtorrent',
 520         http: {
 521           downloadSpeed: 0,
 522           downloaded: 0
 523         },
 524         p2p: {
 525           downloadSpeed: this.torrent.downloadSpeed,
 526           numPeers: this.torrent.numPeers,
 527           uploadSpeed: this.torrent.uploadSpeed,
 528           downloaded: this.torrent.downloaded,
 529           uploaded: this.torrent.uploaded
 530         },
 531         bandwidthEstimate: this.webtorrent.downloadSpeed
 532       } as PlayerNetworkInfo)
 533     }, this.CONSTANTS.INFO_SCHEDULER)
 534   }
 535
 536   private fallbackToHttp (options: PlayOptions, done?: (err?: Error) => void) {
 537     const paused = this.player.paused()
 538
 539     this.disableAutoResolution()
 540
 541     this.flushVideoFile(this.currentVideoFile, true)
 542     this.torrent = null
 543
 544     // Enable error display now this is our last fallback
 545     this.player.one('error', () => this.player.peertube().displayFatalError())
 546
 547     let httpUrl = this.currentVideoFile.fileUrl
 548
 549     if (this.requiresAuth && this.videoFileToken) {
 550       httpUrl = addQueryParams(httpUrl, { videoFileToken: this.videoFileToken() })
 551     }
 552
 553     this.player.src = this.savePlayerSrcFunction
 554     this.player.src(httpUrl)
 555
 556     this.selectAppropriateResolution(true)
 557
 558     // We changed the source, so reinit captions
 559     this.player.trigger('sourcechange')
 560
 561     return this.tryToPlay(err => {
 562       if (err && done) return done(err)
 563
 564       if (options.seek) this.seek(options.seek)
 565       if (options.forcePlay === false && paused === true) this.player.pause()
 566
 567       if (done) return done()
 568     })
 569   }
 570
 571   private handleError (err: Error | string) {
 572     return this.player.trigger('customError', { err })
 573   }
 574
 575   private pickAverageVideoFile () {
 576     if (this.videoFiles.length === 1) return this.videoFiles[0]
 577
 578     const files = this.videoFiles.filter(f => f.resolution.id !== 0)
 579     return files[Math.floor(files.length / 2)]
 580   }
 581
 582   private stopTorrent (torrent: WebTorrent.Torrent) {
 583     torrent.pause()
 584     // Pause does not remove actual peers (in particular the webseed peer)
 585     torrent.removePeer(torrent['ws'])
 586   }
 587
 588   private renderFileInFakeElement (file: WebTorrent.TorrentFile, delay: number) {
 589     this.destroyingFakeRenderer = false
 590
 591     const fakeVideoElem = document.createElement('video')
 592     renderVideo(file, fakeVideoElem, { autoplay: false, controls: false }, (err, renderer) => {
 593       this.fakeRenderer = renderer
 594
 595       // The renderer returns an error when we destroy it, so skip them
 596       if (this.destroyingFakeRenderer === false && err) {
 597         logger.error('Cannot render new torrent in fake video element.', err)
 598       }
 599
 600       // Load the future file at the correct time (in delay MS - 2 seconds)
 601       fakeVideoElem.currentTime = this.player.currentTime() + (delay - 2000)
 602     })
 603   }
 604
 605   private destroyFakeRenderer () {
 606     if (this.fakeRenderer) {
 607       this.destroyingFakeRenderer = true
 608
 609       if (this.fakeRenderer.destroy) {
 610         try {
 611           this.fakeRenderer.destroy()
 612         } catch (err) {
 613           logger.info('Cannot destroy correctly fake renderer.', err)
 614         }
 615       }
 616       this.fakeRenderer = undefined
 617     }
 618   }
 619
 620   private buildQualities () {
 621     const resolutions: PeerTubeResolution[] = this.videoFiles.map(file => ({
 622       id: file.resolution.id,
 623       label: this.buildQualityLabel(file),
 624       height: file.resolution.id,
 625       selected: false,
 626       selectCallback: () => this.changeQuality(file.resolution.id)
 627     }))
 628
 629     resolutions.push({
 630       id: -1,
 631       label: this.player.localize('Auto'),
 632       selected: true,
 633       selectCallback: () => this.changeQuality(-1)
 634     })
 635
 636     this.player.peertubeResolutions().add(resolutions)
 637   }
 638
 639   private buildQualityLabel (file: VideoFile) {
 640     let label = file.resolution.label
 641
 642     if (file.fps && file.fps >= 50) {
 643       label += file.fps
 644     }
 645
 646     return label
 647   }
 648
 649   private selectAppropriateResolution (byEngine: boolean) {
 650     const resolution = this.autoResolution
 651       ? -1
 652       : this.getCurrentResolutionId()
 653
 654     const autoResolutionChosen = this.autoResolution
 655       ? this.getCurrentResolutionId()
 656       : undefined
 657
 658     this.player.peertubeResolutions().select({ id: resolution, autoResolutionChosenId: autoResolutionChosen, byEngine })
 659   }
 660 }
 661
 662 videojs.registerPlugin('webtorrent', WebTorrentPlugin)
 663 export { WebTorrentPlugin }