client/src/assets/player/peertube-videojs-plugin.ts

   1 import * as videojs from 'video.js'
   2 import * as WebTorrent from 'webtorrent'
   3 import { VideoFile } from '../../../../shared/models/videos/video.model'
   4 import { renderVideo } from './video-renderer'
   5 import './settings-menu-button'
   6 import { PeertubePluginOptions, UserWatching, VideoJSCaption, VideoJSComponentInterface, videojsUntyped } from './peertube-videojs-typings'
   7 import { isMobile, timeToInt, videoFileMaxByResolution, videoFileMinByResolution } from './utils'
   8 import * as CacheChunkStore from 'cache-chunk-store'
   9 import { PeertubeChunkStore } from './peertube-chunk-store'
  10 import {
  11   getStoredWebTorrentEnabled,
  12   getAverageBandwidthInStore,
  13   getStoredMute,
  14   getStoredVolume,
  15   saveAverageBandwidth,
  16   saveMuteInStore,
  17   saveVolumeInStore
  18 } from './peertube-player-local-storage'
  19
  20 const Plugin: VideoJSComponentInterface = videojs.getPlugin('plugin')
  21 class PeerTubePlugin extends Plugin {
  22   private readonly playerElement: HTMLVideoElement
  23
  24   private readonly autoplay: boolean = false
  25   private readonly startTime: number = 0
  26   private readonly savePlayerSrcFunction: Function
  27   private readonly videoFiles: VideoFile[]
  28   private readonly videoViewUrl: string
  29   private readonly videoDuration: number
  30   private readonly CONSTANTS = {
  31     INFO_SCHEDULER: 1000, // Don't change this
  32     AUTO_QUALITY_SCHEDULER: 3000, // Check quality every 3 seconds
  33     AUTO_QUALITY_THRESHOLD_PERCENT: 30, // Bandwidth should be 30% more important than a resolution bitrate to change to it
  34     AUTO_QUALITY_OBSERVATION_TIME: 10000, // Wait 10 seconds after having change the resolution before another check
  35     AUTO_QUALITY_HIGHER_RESOLUTION_DELAY: 5000, // Buffering higher resolution during 5 seconds
  36     BANDWIDTH_AVERAGE_NUMBER_OF_VALUES: 5, // Last 5 seconds to build average bandwidth
  37     USER_WATCHING_VIDEO_INTERVAL: 5000 // Every 5 seconds, notify the user is watching the video
  38   }
  39
  40   private readonly webtorrent = new WebTorrent({
  41     tracker: {
  42       rtcConfig: {
  43         iceServers: [
  44           {
  45             urls: 'stun:stun.stunprotocol.org'
  46           },
  47           {
  48             urls: 'stun:stun.framasoft.org'
  49           }
  50         ]
  51       }
  52     },
  53     dht: false
  54   })
  55
  56   private player: any
  57   private currentVideoFile: VideoFile
  58   private torrent: WebTorrent.Torrent
  59   private videoCaptions: VideoJSCaption[]
  60
  61   private renderer
  62   private fakeRenderer
  63   private destoyingFakeRenderer = false
  64
  65   private autoResolution = true
  66   private forbidAutoResolution = false
  67   private isAutoResolutionObservation = false
  68   private playerRefusedP2P = false
  69
  70   private videoViewInterval
  71   private torrentInfoInterval
  72   private autoQualityInterval
  73   private userWatchingVideoInterval
  74   private addTorrentDelay
  75   private qualityObservationTimer
  76   private runAutoQualitySchedulerTimer
  77
  78   private downloadSpeeds: number[] = []
  79
  80   constructor (player: videojs.Player, options: PeertubePluginOptions) {
  81     super(player, options)
  82
  83     // Disable auto play on iOS
  84     this.autoplay = options.autoplay && this.isIOS() === false
  85     this.playerRefusedP2P = !getStoredWebTorrentEnabled()
  86
  87     this.startTime = timeToInt(options.startTime)
  88     this.videoFiles = options.videoFiles
  89     this.videoViewUrl = options.videoViewUrl
  90     this.videoDuration = options.videoDuration
  91     this.videoCaptions = options.videoCaptions
  92
  93     this.savePlayerSrcFunction = this.player.src
  94     this.playerElement = options.playerElement
  95
  96     if (this.autoplay === true) this.player.addClass('vjs-has-autoplay')
  97
  98     this.player.ready(() => {
  99       const volume = getStoredVolume()
 100       if (volume !== undefined) this.player.volume(volume)
 101       const muted = getStoredMute()
 102       if (muted !== undefined) this.player.muted(muted)
 103
 104       this.initializePlayer()
 105       this.runTorrentInfoScheduler()
 106       this.runViewAdd()
 107
 108       if (options.userWatching) this.runUserWatchVideo(options.userWatching)
 109
 110       this.player.one('play', () => {
 111         // Don't run immediately scheduler, wait some seconds the TCP connections are made
 112         this.runAutoQualitySchedulerTimer = setTimeout(() => this.runAutoQualityScheduler(), this.CONSTANTS.AUTO_QUALITY_SCHEDULER)
 113       })
 114     })
 115
 116     this.player.on('volumechange', () => {
 117       saveVolumeInStore(this.player.volume())
 118       saveMuteInStore(this.player.muted())
 119     })
 120   }
 121
 122   dispose () {
 123     clearTimeout(this.addTorrentDelay)
 124     clearTimeout(this.qualityObservationTimer)
 125     clearTimeout(this.runAutoQualitySchedulerTimer)
 126
 127     clearInterval(this.videoViewInterval)
 128     clearInterval(this.torrentInfoInterval)
 129     clearInterval(this.autoQualityInterval)
 130
 131     if (this.userWatchingVideoInterval) clearInterval(this.userWatchingVideoInterval)
 132
 133     // Don't need to destroy renderer, video player will be destroyed
 134     this.flushVideoFile(this.currentVideoFile, false)
 135
 136     this.destroyFakeRenderer()
 137   }
 138
 139   getCurrentResolutionId () {
 140     return this.currentVideoFile ? this.currentVideoFile.resolution.id : -1
 141   }
 142
 143   getCurrentResolutionLabel () {
 144     if (!this.currentVideoFile) return ''
 145
 146     const fps = this.currentVideoFile.fps >= 50 ? this.currentVideoFile.fps : ''
 147     return this.currentVideoFile.resolution.label + fps
 148   }
 149
 150   updateVideoFile (
 151     videoFile?: VideoFile,
 152     options: {
 153       forcePlay?: boolean,
 154       seek?: number,
 155       delay?: number
 156     } = {},
 157     done: () => void = () => { /* empty */ }
 158   ) {
 159     // Automatically choose the adapted video file
 160     if (videoFile === undefined) {
 161       const savedAverageBandwidth = getAverageBandwidthInStore()
 162       videoFile = savedAverageBandwidth
 163         ? this.getAppropriateFile(savedAverageBandwidth)
 164         : this.pickAverageVideoFile()
 165     }
 166
 167     // Don't add the same video file once again
 168     if (this.currentVideoFile !== undefined && this.currentVideoFile.magnetUri === videoFile.magnetUri) {
 169       return
 170     }
 171
 172     // Do not display error to user because we will have multiple fallback
 173     this.disableErrorDisplay()
 174
 175     // Hack to "simulate" src link in video.js >= 6
 176     // Without this, we can't play the video after pausing it
 177     // https://github.com/videojs/video.js/blob/master/src/js/player.js#L1633
 178     this.player.src = () => true
 179     const oldPlaybackRate = this.player.playbackRate()
 180
 181     const previousVideoFile = this.currentVideoFile
 182     this.currentVideoFile = videoFile
 183
 184     this.addTorrent(this.currentVideoFile.magnetUri, previousVideoFile, options, () => {
 185       this.player.playbackRate(oldPlaybackRate)
 186       return done()
 187     })
 188
 189     this.trigger('videoFileUpdate')
 190   }
 191
 192   updateResolution (resolutionId: number, delay = 0) {
 193     // Remember player state
 194     const currentTime = this.player.currentTime()
 195     const isPaused = this.player.paused()
 196
 197     // Remove poster to have black background
 198     this.playerElement.poster = ''
 199
 200     // Hide bigPlayButton
 201     if (!isPaused) {
 202       this.player.bigPlayButton.hide()
 203     }
 204
 205     const newVideoFile = this.videoFiles.find(f => f.resolution.id === resolutionId)
 206     const options = {
 207       forcePlay: false,
 208       delay,
 209       seek: currentTime + (delay / 1000)
 210     }
 211     this.updateVideoFile(newVideoFile, options)
 212   }
 213
 214   flushVideoFile (videoFile: VideoFile, destroyRenderer = true) {
 215     if (videoFile !== undefined && this.webtorrent.get(videoFile.magnetUri)) {
 216       if (destroyRenderer === true && this.renderer && this.renderer.destroy) this.renderer.destroy()
 217
 218       this.webtorrent.remove(videoFile.magnetUri)
 219       console.log('Removed ' + videoFile.magnetUri)
 220     }
 221   }
 222
 223   isAutoResolutionOn () {
 224     return this.autoResolution
 225   }
 226
 227   enableAutoResolution () {
 228     this.autoResolution = true
 229     this.trigger('autoResolutionUpdate')
 230   }
 231
 232   disableAutoResolution (forbid = false) {
 233     if (forbid === true) this.forbidAutoResolution = true
 234
 235     this.autoResolution = false
 236     this.trigger('autoResolutionUpdate')
 237   }
 238
 239   isAutoResolutionForbidden () {
 240     return this.forbidAutoResolution === true
 241   }
 242
 243   getCurrentVideoFile () {
 244     return this.currentVideoFile
 245   }
 246
 247   getTorrent () {
 248     return this.torrent
 249   }
 250
 251   private addTorrent (
 252     magnetOrTorrentUrl: string,
 253     previousVideoFile: VideoFile,
 254     options: {
 255       forcePlay?: boolean,
 256       seek?: number,
 257       delay?: number
 258     },
 259     done: Function
 260   ) {
 261     console.log('Adding ' + magnetOrTorrentUrl + '.')
 262
 263     const oldTorrent = this.torrent
 264     const torrentOptions = {
 265       store: (chunkLength, storeOpts) => new CacheChunkStore(new PeertubeChunkStore(chunkLength, storeOpts), {
 266         max: 100
 267       })
 268     }
 269
 270     this.torrent = this.webtorrent.add(magnetOrTorrentUrl, torrentOptions, torrent => {
 271       console.log('Added ' + magnetOrTorrentUrl + '.')
 272
 273       if (oldTorrent) {
 274         // Pause the old torrent
 275         this.stopTorrent(oldTorrent)
 276
 277         // We use a fake renderer so we download correct pieces of the next file
 278         if (options.delay) this.renderFileInFakeElement(torrent.files[ 0 ], options.delay)
 279       }
 280
 281       // Render the video in a few seconds? (on resolution change for example, we wait some seconds of the new video resolution)
 282       this.addTorrentDelay = setTimeout(() => {
 283         // We don't need the fake renderer anymore
 284         this.destroyFakeRenderer()
 285
 286         const paused = this.player.paused()
 287
 288         this.flushVideoFile(previousVideoFile)
 289
 290         const renderVideoOptions = { autoplay: false, controls: true }
 291         renderVideo(torrent.files[ 0 ], this.playerElement, renderVideoOptions, (err, renderer) => {
 292           this.renderer = renderer
 293
 294           if (err || this.playerRefusedP2P) return this.fallbackToHttp(done)
 295
 296           return this.tryToPlay(err => {
 297             if (err) return done(err)
 298
 299             if (options.seek) this.seek(options.seek)
 300             if (options.forcePlay === false && paused === true) this.player.pause()
 301
 302             return done(err)
 303           })
 304         })
 305       }, options.delay || 0)
 306     })
 307
 308     this.torrent.on('error', err => console.error(err))
 309
 310     this.torrent.on('warning', (err: any) => {
 311       // We don't support HTTP tracker but we don't care -> we use the web socket tracker
 312       if (err.message.indexOf('Unsupported tracker protocol') !== -1) return
 313
 314       // Users don't care about issues with WebRTC, but developers do so log it in the console
 315       if (err.message.indexOf('Ice connection failed') !== -1) {
 316         console.log(err)
 317         return
 318       }
 319
 320       // Magnet hash is not up to date with the torrent file, add directly the torrent file
 321       if (err.message.indexOf('incorrect info hash') !== -1) {
 322         console.error('Incorrect info hash detected, falling back to torrent file.')
 323         const newOptions = { forcePlay: true, seek: options.seek }
 324         return this.addTorrent(this.torrent[ 'xs' ], previousVideoFile, newOptions, done)
 325       }
 326
 327       // Remote instance is down
 328       if (err.message.indexOf('from xs param') !== -1) {
 329         this.handleError(err)
 330       }
 331
 332       console.warn(err)
 333     })
 334   }
 335
 336   private tryToPlay (done?: Function) {
 337     if (!done) done = function () { /* empty */ }
 338
 339     const playPromise = this.player.play()
 340     if (playPromise !== undefined) {
 341       return playPromise.then(done)
 342                         .catch(err => {
 343                           if (err.message.indexOf('The play() request was interrupted by a call to pause()') !== -1) {
 344                             return
 345                           }
 346
 347                           console.error(err)
 348                           this.player.pause()
 349                           this.player.posterImage.show()
 350                           this.player.removeClass('vjs-has-autoplay')
 351                           this.player.removeClass('vjs-has-big-play-button-clicked')
 352
 353                           return done()
 354                         })
 355     }
 356
 357     return done()
 358   }
 359
 360   private seek (time: number) {
 361     this.player.currentTime(time)
 362     this.player.handleTechSeeked_()
 363   }
 364
 365   private getAppropriateFile (averageDownloadSpeed?: number): VideoFile {
 366     if (this.videoFiles === undefined || this.videoFiles.length === 0) return undefined
 367     if (this.videoFiles.length === 1) return this.videoFiles[0]
 368
 369     // Don't change the torrent is the play was ended
 370     if (this.torrent && this.torrent.progress === 1 && this.player.ended()) return this.currentVideoFile
 371
 372     if (!averageDownloadSpeed) averageDownloadSpeed = this.getAndSaveActualDownloadSpeed()
 373
 374     // Limit resolution according to player height
 375     const playerHeight = this.playerElement.offsetHeight as number
 376
 377     // We take the first resolution just above the player height
 378     // Example: player height is 530px, we want the 720p file instead of 480p
 379     let maxResolution = this.videoFiles[0].resolution.id
 380     for (let i = this.videoFiles.length - 1; i >= 0; i--) {
 381       const resolutionId = this.videoFiles[i].resolution.id
 382       if (resolutionId >= playerHeight) {
 383         maxResolution = resolutionId
 384         break
 385       }
 386     }
 387
 388     // Filter videos we can play according to our screen resolution and bandwidth
 389     const filteredFiles = this.videoFiles
 390                               .filter(f => f.resolution.id <= maxResolution)
 391                               .filter(f => {
 392                                 const fileBitrate = (f.size / this.videoDuration)
 393                                 let threshold = fileBitrate
 394
 395                                 // If this is for a higher resolution or an initial load: add a margin
 396                                 if (!this.currentVideoFile || f.resolution.id > this.currentVideoFile.resolution.id) {
 397                                   threshold += ((fileBitrate * this.CONSTANTS.AUTO_QUALITY_THRESHOLD_PERCENT) / 100)
 398                                 }
 399
 400                                 return averageDownloadSpeed > threshold
 401                               })
 402
 403     // If the download speed is too bad, return the lowest resolution we have
 404     if (filteredFiles.length === 0) return videoFileMinByResolution(this.videoFiles)
 405
 406     return videoFileMaxByResolution(filteredFiles)
 407   }
 408
 409   private getAndSaveActualDownloadSpeed () {
 410     const start = Math.max(this.downloadSpeeds.length - this.CONSTANTS.BANDWIDTH_AVERAGE_NUMBER_OF_VALUES, 0)
 411     const lastDownloadSpeeds = this.downloadSpeeds.slice(start, this.downloadSpeeds.length)
 412     if (lastDownloadSpeeds.length === 0) return -1
 413
 414     const sum = lastDownloadSpeeds.reduce((a, b) => a + b)
 415     const averageBandwidth = Math.round(sum / lastDownloadSpeeds.length)
 416
 417     // Save the average bandwidth for future use
 418     saveAverageBandwidth(averageBandwidth)
 419
 420     return averageBandwidth
 421   }
 422
 423   private initializePlayer () {
 424     if (isMobile()) this.player.addClass('vjs-is-mobile')
 425
 426     this.initSmoothProgressBar()
 427
 428     this.initCaptions()
 429
 430     this.alterInactivity()
 431
 432     if (this.autoplay === true) {
 433       this.player.posterImage.hide()
 434
 435       return this.updateVideoFile(undefined, { forcePlay: true, seek: this.startTime })
 436     }
 437
 438     // Don't try on iOS that does not support MediaSource
 439     if (this.isIOS()) {
 440       this.currentVideoFile = this.pickAverageVideoFile()
 441       return this.fallbackToHttp(undefined, false)
 442     }
 443
 444     // Proxy first play
 445     const oldPlay = this.player.play.bind(this.player)
 446     this.player.play = () => {
 447       this.player.addClass('vjs-has-big-play-button-clicked')
 448       this.player.play = oldPlay
 449
 450       this.updateVideoFile(undefined, { forcePlay: true, seek: this.startTime })
 451     }
 452   }
 453
 454   private runAutoQualityScheduler () {
 455     this.autoQualityInterval = setInterval(() => {
 456
 457       // Not initialized or in HTTP fallback
 458       if (this.torrent === undefined || this.torrent === null) return
 459       if (this.isAutoResolutionOn() === false) return
 460       if (this.isAutoResolutionObservation === true) return
 461
 462       const file = this.getAppropriateFile()
 463       let changeResolution = false
 464       let changeResolutionDelay = 0
 465
 466       // Lower resolution
 467       if (this.isPlayerWaiting() && file.resolution.id < this.currentVideoFile.resolution.id) {
 468         console.log('Downgrading automatically the resolution to: %s', file.resolution.label)
 469         changeResolution = true
 470       } else if (file.resolution.id > this.currentVideoFile.resolution.id) { // Higher resolution
 471         console.log('Upgrading automatically the resolution to: %s', file.resolution.label)
 472         changeResolution = true
 473         changeResolutionDelay = this.CONSTANTS.AUTO_QUALITY_HIGHER_RESOLUTION_DELAY
 474       }
 475
 476       if (changeResolution === true) {
 477         this.updateResolution(file.resolution.id, changeResolutionDelay)
 478
 479         // Wait some seconds in observation of our new resolution
 480         this.isAutoResolutionObservation = true
 481
 482         this.qualityObservationTimer = setTimeout(() => {
 483           this.isAutoResolutionObservation = false
 484         }, this.CONSTANTS.AUTO_QUALITY_OBSERVATION_TIME)
 485       }
 486     }, this.CONSTANTS.AUTO_QUALITY_SCHEDULER)
 487   }
 488
 489   private isPlayerWaiting () {
 490     return this.player && this.player.hasClass('vjs-waiting')
 491   }
 492
 493   private runTorrentInfoScheduler () {
 494     this.torrentInfoInterval = setInterval(() => {
 495       // Not initialized yet
 496       if (this.torrent === undefined) return
 497
 498       // Http fallback
 499       if (this.torrent === null) return this.trigger('torrentInfo', false)
 500
 501       // this.webtorrent.downloadSpeed because we need to take into account the potential old torrent too
 502       if (this.webtorrent.downloadSpeed !== 0) this.downloadSpeeds.push(this.webtorrent.downloadSpeed)
 503
 504       return this.trigger('torrentInfo', {
 505         downloadSpeed: this.torrent.downloadSpeed,
 506         numPeers: this.torrent.numPeers,
 507         uploadSpeed: this.torrent.uploadSpeed,
 508         downloaded: this.torrent.downloaded,
 509         uploaded: this.torrent.uploaded
 510       })
 511     }, this.CONSTANTS.INFO_SCHEDULER)
 512   }
 513
 514   private runViewAdd () {
 515     this.clearVideoViewInterval()
 516
 517     // After 30 seconds (or 3/4 of the video), add a view to the video
 518     let minSecondsToView = 30
 519
 520     if (this.videoDuration < minSecondsToView) minSecondsToView = (this.videoDuration * 3) / 4
 521
 522     let secondsViewed = 0
 523     this.videoViewInterval = setInterval(() => {
 524       if (this.player && !this.player.paused()) {
 525         secondsViewed += 1
 526
 527         if (secondsViewed > minSecondsToView) {
 528           this.clearVideoViewInterval()
 529
 530           this.addViewToVideo().catch(err => console.error(err))
 531         }
 532       }
 533     }, 1000)
 534   }
 535
 536   private runUserWatchVideo (options: UserWatching) {
 537     let lastCurrentTime = 0
 538
 539     this.userWatchingVideoInterval = setInterval(() => {
 540       const currentTime = Math.floor(this.player.currentTime())
 541
 542       if (currentTime - lastCurrentTime >= 1) {
 543         lastCurrentTime = currentTime
 544
 545         this.notifyUserIsWatching(currentTime, options.url, options.authorizationHeader)
 546           .catch(err => console.error('Cannot notify user is watching.', err))
 547       }
 548     }, this.CONSTANTS.USER_WATCHING_VIDEO_INTERVAL)
 549   }
 550
 551   private clearVideoViewInterval () {
 552     if (this.videoViewInterval !== undefined) {
 553       clearInterval(this.videoViewInterval)
 554       this.videoViewInterval = undefined
 555     }
 556   }
 557
 558   private addViewToVideo () {
 559     if (!this.videoViewUrl) return Promise.resolve(undefined)
 560
 561     return fetch(this.videoViewUrl, { method: 'POST' })
 562   }
 563
 564   private notifyUserIsWatching (currentTime: number, url: string, authorizationHeader: string) {
 565     const body = new URLSearchParams()
 566     body.append('currentTime', currentTime.toString())
 567
 568     const headers = new Headers({ 'Authorization': authorizationHeader })
 569
 570     return fetch(url, { method: 'PUT', body, headers })
 571   }
 572
 573   private fallbackToHttp (done?: Function, play = true) {
 574     this.disableAutoResolution(true)
 575
 576     this.flushVideoFile(this.currentVideoFile, true)
 577     this.torrent = null
 578
 579     // Enable error display now this is our last fallback
 580     this.player.one('error', () => this.enableErrorDisplay())
 581
 582     const httpUrl = this.currentVideoFile.fileUrl
 583     this.player.src = this.savePlayerSrcFunction
 584     this.player.src(httpUrl)
 585     if (play) this.tryToPlay()
 586
 587     if (done) return done()
 588   }
 589
 590   private handleError (err: Error | string) {
 591     return this.player.trigger('customError', { err })
 592   }
 593
 594   private enableErrorDisplay () {
 595     this.player.addClass('vjs-error-display-enabled')
 596   }
 597
 598   private disableErrorDisplay () {
 599     this.player.removeClass('vjs-error-display-enabled')
 600   }
 601
 602   private isIOS () {
 603     return !!navigator.platform && /iPad|iPhone|iPod/.test(navigator.platform)
 604   }
 605
 606   private alterInactivity () {
 607     let saveInactivityTimeout: number
 608
 609     const disableInactivity = () => {
 610       saveInactivityTimeout = this.player.options_.inactivityTimeout
 611       this.player.options_.inactivityTimeout = 0
 612     }
 613     const enableInactivity = () => {
 614       this.player.options_.inactivityTimeout = saveInactivityTimeout
 615     }
 616
 617     const settingsDialog = this.player.children_.find(c => c.name_ === 'SettingsDialog')
 618
 619     this.player.controlBar.on('mouseenter', () => disableInactivity())
 620     settingsDialog.on('mouseenter', () => disableInactivity())
 621     this.player.controlBar.on('mouseleave', () => enableInactivity())
 622     settingsDialog.on('mouseleave', () => enableInactivity())
 623   }
 624
 625   private pickAverageVideoFile () {
 626     if (this.videoFiles.length === 1) return this.videoFiles[0]
 627
 628     return this.videoFiles[Math.floor(this.videoFiles.length / 2)]
 629   }
 630
 631   private stopTorrent (torrent: WebTorrent.Torrent) {
 632     torrent.pause()
 633     // Pause does not remove actual peers (in particular the webseed peer)
 634     torrent.removePeer(torrent[ 'ws' ])
 635   }
 636
 637   private renderFileInFakeElement (file: WebTorrent.TorrentFile, delay: number) {
 638     this.destoyingFakeRenderer = false
 639
 640     const fakeVideoElem = document.createElement('video')
 641     renderVideo(file, fakeVideoElem, { autoplay: false, controls: false }, (err, renderer) => {
 642       this.fakeRenderer = renderer
 643
 644       // The renderer returns an error when we destroy it, so skip them
 645       if (this.destoyingFakeRenderer === false && err) {
 646         console.error('Cannot render new torrent in fake video element.', err)
 647       }
 648
 649       // Load the future file at the correct time (in delay MS - 2 seconds)
 650       fakeVideoElem.currentTime = this.player.currentTime() + (delay - 2000)
 651     })
 652   }
 653
 654   private destroyFakeRenderer () {
 655     if (this.fakeRenderer) {
 656       this.destoyingFakeRenderer = true
 657
 658       if (this.fakeRenderer.destroy) {
 659         try {
 660           this.fakeRenderer.destroy()
 661         } catch (err) {
 662           console.log('Cannot destroy correctly fake renderer.', err)
 663         }
 664       }
 665       this.fakeRenderer = undefined
 666     }
 667   }
 668
 669   private initCaptions () {
 670     for (const caption of this.videoCaptions) {
 671       this.player.addRemoteTextTrack({
 672         kind: 'captions',
 673         label: caption.label,
 674         language: caption.language,
 675         id: caption.language,
 676         src: caption.src
 677       }, false)
 678     }
 679   }
 680
 681   // Thanks: https://github.com/videojs/video.js/issues/4460#issuecomment-312861657
 682   private initSmoothProgressBar () {
 683     const SeekBar = videojsUntyped.getComponent('SeekBar')
 684     SeekBar.prototype.getPercent = function getPercent () {
 685       // Allows for smooth scrubbing, when player can't keep up.
 686       // const time = (this.player_.scrubbing()) ?
 687       //   this.player_.getCache().currentTime :
 688       //   this.player_.currentTime()
 689       const time = this.player_.currentTime()
 690       const percent = time / this.player_.duration()
 691       return percent >= 1 ? 1 : percent
 692     }
 693     SeekBar.prototype.handleMouseMove = function handleMouseMove (event) {
 694       let newTime = this.calculateDistance(event) * this.player_.duration()
 695       if (newTime === this.player_.duration()) {
 696         newTime = newTime - 0.1
 697       }
 698       this.player_.currentTime(newTime)
 699       this.update()
 700     }
 701   }
 702 }
 703
 704 videojs.registerPlugin('peertube', PeerTubePlugin)
 705 export { PeerTubePlugin }