aboutsummaryrefslogtreecommitdiffhomepage
path: root/server/lib/live-manager.ts
blob: c8e5bcb774d7d0fb94acb114634c46456dc1e6a3 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
import * as Bluebird from 'bluebird'
import * as chokidar from 'chokidar'
import { FfmpegCommand } from 'fluent-ffmpeg'
import { appendFile, ensureDir, readFile, stat } from 'fs-extra'
import { createServer, Server } from 'net'
import { basename, join } from 'path'
import { isTestInstance } from '@server/helpers/core-utils'
import { getLiveMuxingCommand, getLiveTranscodingCommand } from '@server/helpers/ffmpeg-utils'
import { computeResolutionsToTranscode, getVideoFileFPS, getVideoFileResolution } from '@server/helpers/ffprobe-utils'
import { logger } from '@server/helpers/logger'
import { CONFIG, registerConfigChangedHandler } from '@server/initializers/config'
import { MEMOIZE_TTL, P2P_MEDIA_LOADER_PEER_VERSION, VIDEO_LIVE, VIEW_LIFETIME, WEBSERVER } from '@server/initializers/constants'
import { UserModel } from '@server/models/account/user'
import { VideoModel } from '@server/models/video/video'
import { VideoFileModel } from '@server/models/video/video-file'
import { VideoLiveModel } from '@server/models/video/video-live'
import { VideoStreamingPlaylistModel } from '@server/models/video/video-streaming-playlist'
import { MStreamingPlaylist, MUserId, MVideoLive, MVideoLiveVideo } from '@server/types/models'
import { VideoState, VideoStreamingPlaylistType } from '@shared/models'
import { federateVideoIfNeeded } from './activitypub/videos'
import { buildSha256Segment } from './hls'
import { JobQueue } from './job-queue'
import { cleanupLive } from './job-queue/handlers/video-live-ending'
import { PeerTubeSocket } from './peertube-socket'
import { isAbleToUploadVideo } from './user'
import { getHLSDirectory } from './video-paths'
import { VideoTranscodingProfilesManager } from './video-transcoding-profiles'

import memoizee = require('memoizee')
const NodeRtmpSession = require('node-media-server/node_rtmp_session')
const context = require('node-media-server/node_core_ctx')
const nodeMediaServerLogger = require('node-media-server/node_core_logger')

// Disable node media server logs
nodeMediaServerLogger.setLogType(0)

const config = {
  rtmp: {
    port: CONFIG.LIVE.RTMP.PORT,
    chunk_size: VIDEO_LIVE.RTMP.CHUNK_SIZE,
    gop_cache: VIDEO_LIVE.RTMP.GOP_CACHE,
    ping: VIDEO_LIVE.RTMP.PING,
    ping_timeout: VIDEO_LIVE.RTMP.PING_TIMEOUT
  },
  transcoding: {
    ffmpeg: 'ffmpeg'
  }
}

class LiveManager {

  private static instance: LiveManager

  private readonly transSessions = new Map<string, FfmpegCommand>()
  private readonly videoSessions = new Map<number, string>()
  // Values are Date().getTime()
  private readonly watchersPerVideo = new Map<number, number[]>()
  private readonly segmentsSha256 = new Map<string, Map<string, string>>()
  private readonly livesPerUser = new Map<number, { liveId: number, videoId: number, size: number }[]>()

  private readonly isAbleToUploadVideoWithCache = memoizee((userId: number) => {
    return isAbleToUploadVideo(userId, 1000)
  }, { maxAge: MEMOIZE_TTL.LIVE_ABLE_TO_UPLOAD })

  private readonly hasClientSocketsInBadHealthWithCache = memoizee((sessionId: string) => {
    return this.hasClientSocketsInBadHealth(sessionId)
  }, { maxAge: MEMOIZE_TTL.LIVE_CHECK_SOCKET_HEALTH })

  private rtmpServer: Server

  private constructor () {
  }

  init () {
    const events = this.getContext().nodeEvent
    events.on('postPublish', (sessionId: string, streamPath: string) => {
      logger.debug('RTMP received stream', { id: sessionId, streamPath })

      const splittedPath = streamPath.split('/')
      if (splittedPath.length !== 3 || splittedPath[1] !== VIDEO_LIVE.RTMP.BASE_PATH) {
        logger.warn('Live path is incorrect.', { streamPath })
        return this.abortSession(sessionId)
      }

      this.handleSession(sessionId, streamPath, splittedPath[2])
        .catch(err => logger.error('Cannot handle sessions.', { err }))
    })

    events.on('donePublish', sessionId => {
      logger.info('Live session ended.', { sessionId })
    })

    registerConfigChangedHandler(() => {
      if (!this.rtmpServer && CONFIG.LIVE.ENABLED === true) {
        this.run()
        return
      }

      if (this.rtmpServer && CONFIG.LIVE.ENABLED === false) {
        this.stop()
      }
    })

    // Cleanup broken lives, that were terminated by a server restart for example
    this.handleBrokenLives()
      .catch(err => logger.error('Cannot handle broken lives.', { err }))

    setInterval(() => this.updateLiveViews(), VIEW_LIFETIME.LIVE)
  }

  run () {
    logger.info('Running RTMP server on port %d', config.rtmp.port)

    this.rtmpServer = createServer(socket => {
      const session = new NodeRtmpSession(config, socket)

      session.run()
    })

    this.rtmpServer.on('error', err => {
      logger.error('Cannot run RTMP server.', { err })
    })

    this.rtmpServer.listen(CONFIG.LIVE.RTMP.PORT)
  }

  stop () {
    logger.info('Stopping RTMP server.')

    this.rtmpServer.close()
    this.rtmpServer = undefined

    // Sessions is an object
    this.getContext().sessions.forEach((session: any) => {
      if (session instanceof NodeRtmpSession) {
        session.stop()
      }
    })
  }

  isRunning () {
    return !!this.rtmpServer
  }

  getSegmentsSha256 (videoUUID: string) {
    return this.segmentsSha256.get(videoUUID)
  }

  stopSessionOf (videoId: number) {
    const sessionId = this.videoSessions.get(videoId)
    if (!sessionId) return

    this.videoSessions.delete(videoId)
    this.abortSession(sessionId)
  }

  getLiveQuotaUsedByUser (userId: number) {
    const currentLives = this.livesPerUser.get(userId)
    if (!currentLives) return 0

    return currentLives.reduce((sum, obj) => sum + obj.size, 0)
  }

  addViewTo (videoId: number) {
    if (this.videoSessions.has(videoId) === false) return

    let watchers = this.watchersPerVideo.get(videoId)

    if (!watchers) {
      watchers = []
      this.watchersPerVideo.set(videoId, watchers)
    }

    watchers.push(new Date().getTime())
  }

  cleanupShaSegments (videoUUID: string) {
    this.segmentsSha256.delete(videoUUID)
  }

  addSegmentToReplay (hlsVideoPath: string, segmentPath: string) {
    const segmentName = basename(segmentPath)
    const dest = join(hlsVideoPath, VIDEO_LIVE.REPLAY_DIRECTORY, this.buildConcatenatedName(segmentName))

    return readFile(segmentPath)
      .then(data => appendFile(dest, data))
      .catch(err => logger.error('Cannot copy segment %s to repay directory.', segmentPath, { err }))
  }

  buildConcatenatedName (segmentOrPlaylistPath: string) {
    const num = basename(segmentOrPlaylistPath).match(/^(\d+)(-|\.)/)

    return 'concat-' + num[1] + '.ts'
  }

  private processSegments (hlsVideoPath: string, videoUUID: string, videoLive: MVideoLive, segmentPaths: string[]) {
    Bluebird.mapSeries(segmentPaths, async previousSegment => {
      // Add sha hash of previous segments, because ffmpeg should have finished generating them
      await this.addSegmentSha(videoUUID, previousSegment)

      if (videoLive.saveReplay) {
        await this.addSegmentToReplay(hlsVideoPath, previousSegment)
      }
    }).catch(err => logger.error('Cannot process segments in %s', hlsVideoPath, { err }))
  }

  private getContext () {
    return context
  }

  private abortSession (id: string) {
    const session = this.getContext().sessions.get(id)
    if (session) {
      session.stop()
      this.getContext().sessions.delete(id)
    }

    const transSession = this.transSessions.get(id)
    if (transSession) {
      transSession.kill('SIGINT')
      this.transSessions.delete(id)
    }
  }

  private async handleSession (sessionId: string, streamPath: string, streamKey: string) {
    const videoLive = await VideoLiveModel.loadByStreamKey(streamKey)
    if (!videoLive) {
      logger.warn('Unknown live video with stream key %s.', streamKey)
      return this.abortSession(sessionId)
    }

    const video = videoLive.Video
    if (video.isBlacklisted()) {
      logger.warn('Video is blacklisted. Refusing stream %s.', streamKey)
      return this.abortSession(sessionId)
    }

    // Cleanup old potential live files (could happen with a permanent live)
    this.cleanupShaSegments(video.uuid)

    const oldStreamingPlaylist = await VideoStreamingPlaylistModel.loadHLSPlaylistByVideo(video.id)
    if (oldStreamingPlaylist) {
      await cleanupLive(video, oldStreamingPlaylist)
    }

    this.videoSessions.set(video.id, sessionId)

    const playlistUrl = WEBSERVER.URL + VideoStreamingPlaylistModel.getHlsMasterPlaylistStaticPath(video.uuid)

    const session = this.getContext().sessions.get(sessionId)
    const rtmpUrl = 'rtmp://127.0.0.1:' + config.rtmp.port + streamPath

    const [ resolutionResult, fps ] = await Promise.all([
      getVideoFileResolution(rtmpUrl),
      getVideoFileFPS(rtmpUrl)
    ])

    const resolutionsEnabled = CONFIG.LIVE.TRANSCODING.ENABLED
      ? computeResolutionsToTranscode(resolutionResult.videoFileResolution, 'live')
      : []

    const allResolutions = resolutionsEnabled.concat([ session.videoHeight ])

    logger.info('Will mux/transcode live video of original resolution %d.', session.videoHeight, { allResolutions })

    const [ videoStreamingPlaylist ] = await VideoStreamingPlaylistModel.upsert({
      videoId: video.id,
      playlistUrl,
      segmentsSha256Url: WEBSERVER.URL + VideoStreamingPlaylistModel.getHlsSha256SegmentsStaticPath(video.uuid, video.isLive),
      p2pMediaLoaderInfohashes: VideoStreamingPlaylistModel.buildP2PMediaLoaderInfoHashes(playlistUrl, allResolutions),
      p2pMediaLoaderPeerVersion: P2P_MEDIA_LOADER_PEER_VERSION,

      type: VideoStreamingPlaylistType.HLS
    }, { returning: true }) as [ MStreamingPlaylist, boolean ]

    return this.runMuxing({
      sessionId,
      videoLive,
      playlist: videoStreamingPlaylist,
      rtmpUrl,
      fps,
      allResolutions
    })
  }

  private async runMuxing (options: {
    sessionId: string
    videoLive: MVideoLiveVideo
    playlist: MStreamingPlaylist
    rtmpUrl: string
    fps: number
    allResolutions: number[]
  }) {
    const { sessionId, videoLive, playlist, allResolutions, fps, rtmpUrl } = options
    const startStreamDateTime = new Date().getTime()

    const user = await UserModel.loadByLiveId(videoLive.id)
    if (!this.livesPerUser.has(user.id)) {
      this.livesPerUser.set(user.id, [])
    }

    const currentUserLive = { liveId: videoLive.id, videoId: videoLive.videoId, size: 0 }
    const livesOfUser = this.livesPerUser.get(user.id)
    livesOfUser.push(currentUserLive)

    for (let i = 0; i < allResolutions.length; i++) {
      const resolution = allResolutions[i]

      const file = new VideoFileModel({
        resolution,
        size: -1,
        extname: '.ts',
        infoHash: null,
        fps,
        videoStreamingPlaylistId: playlist.id
      })

      VideoFileModel.customUpsert(file, 'streaming-playlist', null)
        .catch(err => logger.error('Cannot create file for live streaming.', { err }))
    }

    const outPath = getHLSDirectory(videoLive.Video)
    await ensureDir(outPath)

    const replayDirectory = join(outPath, VIDEO_LIVE.REPLAY_DIRECTORY)

    if (videoLive.saveReplay === true) {
      await ensureDir(replayDirectory)
    }

    const videoUUID = videoLive.Video.uuid

    const ffmpegExec = CONFIG.LIVE.TRANSCODING.ENABLED
      ? await getLiveTranscodingCommand({
        rtmpUrl,
        outPath,
        resolutions: allResolutions,
        fps,
        availableEncoders: VideoTranscodingProfilesManager.Instance.getAvailableEncoders(),
        profile: 'default'
      })
      : getLiveMuxingCommand(rtmpUrl, outPath)

    logger.info('Running live muxing/transcoding for %s.', videoUUID)
    this.transSessions.set(sessionId, ffmpegExec)

    const tsWatcher = chokidar.watch(outPath + '/*.ts')

    const segmentsToProcessPerPlaylist: { [playlistId: string]: string[] } = {}
    const playlistIdMatcher = /^([\d+])-/

    const addHandler = segmentPath => {
      logger.debug('Live add handler of %s.', segmentPath)

      const playlistId = basename(segmentPath).match(playlistIdMatcher)[0]

      const segmentsToProcess = segmentsToProcessPerPlaylist[playlistId] || []
      this.processSegments(outPath, videoUUID, videoLive, segmentsToProcess)

      segmentsToProcessPerPlaylist[playlistId] = [ segmentPath ]

      if (this.hasClientSocketsInBadHealthWithCache(sessionId)) {
        logger.error(
          'Too much data in client socket stream (ffmpeg is too slow to transcode the video).' +
          ' Stopping session of video %s.', videoUUID)

        this.stopSessionOf(videoLive.videoId)
        return
      }

      // Duration constraint check
      if (this.isDurationConstraintValid(startStreamDateTime) !== true) {
        logger.info('Stopping session of %s: max duration exceeded.', videoUUID)

        this.stopSessionOf(videoLive.videoId)
        return
      }

      // Check user quota if the user enabled replay saving
      if (videoLive.saveReplay === true) {
        stat(segmentPath)
          .then(segmentStat => {
            currentUserLive.size += segmentStat.size
          })
          .then(() => this.isQuotaConstraintValid(user, videoLive))
          .then(quotaValid => {
            if (quotaValid !== true) {
              logger.info('Stopping session of %s: user quota exceeded.', videoUUID)

              this.stopSessionOf(videoLive.videoId)
            }
          })
          .catch(err => logger.error('Cannot stat %s or check quota of %d.', segmentPath, user.id, { err }))
      }
    }

    const deleteHandler = segmentPath => this.removeSegmentSha(videoUUID, segmentPath)

    tsWatcher.on('add', p => addHandler(p))
    tsWatcher.on('unlink', p => deleteHandler(p))

    const masterWatcher = chokidar.watch(outPath + '/master.m3u8')
    masterWatcher.on('add', async () => {
      try {
        const video = await VideoModel.loadAndPopulateAccountAndServerAndTags(videoLive.videoId)

        video.state = VideoState.PUBLISHED
        await video.save()
        videoLive.Video = video

        setTimeout(() => {
          federateVideoIfNeeded(video, false)
            .catch(err => logger.error('Cannot federate live video %s.', video.url, { err }))

          PeerTubeSocket.Instance.sendVideoLiveNewState(video)
        }, VIDEO_LIVE.SEGMENT_TIME_SECONDS * 1000 * VIDEO_LIVE.EDGE_LIVE_DELAY_SEGMENTS_NOTIFICATION)

      } catch (err) {
        logger.error('Cannot save/federate live video %d.', videoLive.videoId, { err })
      } finally {
        masterWatcher.close()
          .catch(err => logger.error('Cannot close master watcher of %s.', outPath, { err }))
      }
    })

    const onFFmpegEnded = () => {
      logger.info('RTMP transmuxing for video %s ended. Scheduling cleanup', rtmpUrl)

      this.transSessions.delete(sessionId)

      this.watchersPerVideo.delete(videoLive.videoId)
      this.videoSessions.delete(videoLive.videoId)

      const newLivesPerUser = this.livesPerUser.get(user.id)
                                               .filter(o => o.liveId !== videoLive.id)
      this.livesPerUser.set(user.id, newLivesPerUser)

      setTimeout(() => {
        // Wait latest segments generation, and close watchers

        Promise.all([ tsWatcher.close(), masterWatcher.close() ])
          .then(() => {
            // Process remaining segments hash
            for (const key of Object.keys(segmentsToProcessPerPlaylist)) {
              this.processSegments(outPath, videoUUID, videoLive, segmentsToProcessPerPlaylist[key])
            }
          })
          .catch(err => logger.error('Cannot close watchers of %s or process remaining hash segments.', outPath, { err }))

        this.onEndTransmuxing(videoLive.Video.id)
          .catch(err => logger.error('Error in closed transmuxing.', { err }))
      }, 1000)
    }

    ffmpegExec.on('error', (err, stdout, stderr) => {
      onFFmpegEnded()

      // Don't care that we killed the ffmpeg process
      if (err?.message?.includes('Exiting normally')) return

      logger.error('Live transcoding error.', { err, stdout, stderr })

      this.abortSession(sessionId)
    })

    ffmpegExec.on('end', () => onFFmpegEnded())

    ffmpegExec.run()
  }

  private async onEndTransmuxing (videoId: number, cleanupNow = false) {
    try {
      const fullVideo = await VideoModel.loadAndPopulateAccountAndServerAndTags(videoId)
      if (!fullVideo) return

      const live = await VideoLiveModel.loadByVideoId(videoId)

      if (!live.permanentLive) {
        JobQueue.Instance.createJob({
          type: 'video-live-ending',
          payload: {
            videoId: fullVideo.id
          }
        }, { delay: cleanupNow ? 0 : VIDEO_LIVE.CLEANUP_DELAY })

        fullVideo.state = VideoState.LIVE_ENDED
      } else {
        fullVideo.state = VideoState.WAITING_FOR_LIVE
      }

      await fullVideo.save()

      PeerTubeSocket.Instance.sendVideoLiveNewState(fullVideo)

      await federateVideoIfNeeded(fullVideo, false)
    } catch (err) {
      logger.error('Cannot save/federate new video state of live streaming.', { err })
    }
  }

  private async addSegmentSha (videoUUID: string, segmentPath: string) {
    const segmentName = basename(segmentPath)
    logger.debug('Adding live sha segment %s.', segmentPath)

    const shaResult = await buildSha256Segment(segmentPath)

    if (!this.segmentsSha256.has(videoUUID)) {
      this.segmentsSha256.set(videoUUID, new Map())
    }

    const filesMap = this.segmentsSha256.get(videoUUID)
    filesMap.set(segmentName, shaResult)
  }

  private removeSegmentSha (videoUUID: string, segmentPath: string) {
    const segmentName = basename(segmentPath)

    logger.debug('Removing live sha segment %s.', segmentPath)

    const filesMap = this.segmentsSha256.get(videoUUID)
    if (!filesMap) {
      logger.warn('Unknown files map to remove sha for %s.', videoUUID)
      return
    }

    if (!filesMap.has(segmentName)) {
      logger.warn('Unknown segment in files map for video %s and segment %s.', videoUUID, segmentPath)
      return
    }

    filesMap.delete(segmentName)
  }

  private isDurationConstraintValid (streamingStartTime: number) {
    const maxDuration = CONFIG.LIVE.MAX_DURATION
    // No limit
    if (maxDuration < 0) return true

    const now = new Date().getTime()
    const max = streamingStartTime + maxDuration

    return now <= max
  }

  private hasClientSocketsInBadHealth (sessionId: string) {
    const rtmpSession = this.getContext().sessions.get(sessionId)

    if (!rtmpSession) {
      logger.warn('Cannot get session %s to check players socket health.', sessionId)
      return
    }

    for (const playerSessionId of rtmpSession.players) {
      const playerSession = this.getContext().sessions.get(playerSessionId)

      if (!playerSession) {
        logger.error('Cannot get player session %s to check socket health.', playerSession)
        continue
      }

      if (playerSession.socket.writableLength > VIDEO_LIVE.MAX_SOCKET_WAITING_DATA) {
        return true
      }
    }

    return false
  }

  private async isQuotaConstraintValid (user: MUserId, live: MVideoLive) {
    if (live.saveReplay !== true) return true

    return this.isAbleToUploadVideoWithCache(user.id)
  }

  private async updateLiveViews () {
    if (!this.isRunning()) return

    if (!isTestInstance()) logger.info('Updating live video views.')

    for (const videoId of this.watchersPerVideo.keys()) {
      const notBefore = new Date().getTime() - VIEW_LIFETIME.LIVE

      const watchers = this.watchersPerVideo.get(videoId)

      const numWatchers = watchers.length

      const video = await VideoModel.loadAndPopulateAccountAndServerAndTags(videoId)
      video.views = numWatchers
      await video.save()

      await federateVideoIfNeeded(video, false)

      PeerTubeSocket.Instance.sendVideoViewsUpdate(video)

      // Only keep not expired watchers
      const newWatchers = watchers.filter(w => w > notBefore)
      this.watchersPerVideo.set(videoId, newWatchers)

      logger.debug('New live video views for %s is %d.', video.url, numWatchers)
    }
  }

  private async handleBrokenLives () {
    const videoIds = await VideoModel.listPublishedLiveIds()

    for (const id of videoIds) {
      await this.onEndTransmuxing(id, true)
    }
  }

  static get Instance () {
    return this.instance || (this.instance = new this())
  }
}

// ---------------------------------------------------------------------------

export {
  LiveManager
}