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