aboutsummaryrefslogtreecommitdiffhomepage
path: root/server/lib/live/shared/muxing-session.ts
blob: 55d070c963dc02c6eb4befc24d072a35b9b3018a (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
import { mapSeries } from 'bluebird'
import { FSWatcher, watch } from 'chokidar'
import { FfmpegCommand } from 'fluent-ffmpeg'
import { appendFile, ensureDir, readFile, stat } from 'fs-extra'
import { basename, join } from 'path'
import { EventEmitter } from 'stream'
import { getLiveMuxingCommand, getLiveTranscodingCommand } from '@server/helpers/ffmpeg'
import { logger, loggerTagsFactory, LoggerTagsFn } from '@server/helpers/logger'
import { CONFIG } from '@server/initializers/config'
import { MEMOIZE_TTL, VIDEO_LIVE } from '@server/initializers/constants'
import { VideoFileModel } from '@server/models/video/video-file'
import { MStreamingPlaylistVideo, MUserId, MVideoLiveVideo } from '@server/types/models'
import { getLiveDirectory, getLiveReplayBaseDirectory } from '../../paths'
import { VideoTranscodingProfilesManager } from '../../transcoding/default-transcoding-profiles'
import { isAbleToUploadVideo } from '../../user'
import { LiveQuotaStore } from '../live-quota-store'
import { LiveSegmentShaStore } from '../live-segment-sha-store'
import { buildConcatenatedName } from '../live-utils'

import memoizee = require('memoizee')

interface MuxingSessionEvents {
  'master-playlist-created': ({ videoId: number }) => void

  'bad-socket-health': ({ videoId: number }) => void
  'duration-exceeded': ({ videoId: number }) => void
  'quota-exceeded': ({ videoId: number }) => void

  'ffmpeg-end': ({ videoId: number }) => void
  'ffmpeg-error': ({ videoId: string }) => void

  'after-cleanup': ({ videoId: number }) => void
}

declare interface MuxingSession {
  on<U extends keyof MuxingSessionEvents>(
    event: U, listener: MuxingSessionEvents[U]
  ): this

  emit<U extends keyof MuxingSessionEvents>(
    event: U, ...args: Parameters<MuxingSessionEvents[U]>
  ): boolean
}

class MuxingSession extends EventEmitter {

  private ffmpegCommand: FfmpegCommand

  private readonly context: any
  private readonly user: MUserId
  private readonly sessionId: string
  private readonly videoLive: MVideoLiveVideo
  private readonly streamingPlaylist: MStreamingPlaylistVideo
  private readonly inputUrl: string
  private readonly fps: number
  private readonly allResolutions: number[]

  private readonly bitrate: number
  private readonly ratio: number

  private readonly videoId: number
  private readonly videoUUID: string
  private readonly saveReplay: boolean

  private readonly outDirectory: string
  private readonly replayDirectory: string

  private readonly lTags: LoggerTagsFn

  private segmentsToProcessPerPlaylist: { [playlistId: string]: string[] } = {}

  private tsWatcher: FSWatcher
  private masterWatcher: FSWatcher

  private aborted = false

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

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

  constructor (options: {
    context: any
    user: MUserId
    sessionId: string
    videoLive: MVideoLiveVideo
    streamingPlaylist: MStreamingPlaylistVideo
    inputUrl: string
    fps: number
    bitrate: number
    ratio: number
    allResolutions: number[]
  }) {
    super()

    this.context = options.context
    this.user = options.user
    this.sessionId = options.sessionId
    this.videoLive = options.videoLive
    this.streamingPlaylist = options.streamingPlaylist
    this.inputUrl = options.inputUrl
    this.fps = options.fps

    this.bitrate = options.bitrate
    this.ratio = options.ratio

    this.allResolutions = options.allResolutions

    this.videoId = this.videoLive.Video.id
    this.videoUUID = this.videoLive.Video.uuid

    this.saveReplay = this.videoLive.saveReplay

    this.outDirectory = getLiveDirectory(this.videoLive.Video)
    this.replayDirectory = join(getLiveReplayBaseDirectory(this.videoLive.Video), new Date().toISOString())

    this.lTags = loggerTagsFactory('live', this.sessionId, this.videoUUID)
  }

  async runMuxing () {
    this.createFiles()

    await this.prepareDirectories()

    this.ffmpegCommand = CONFIG.LIVE.TRANSCODING.ENABLED
      ? await getLiveTranscodingCommand({
        inputUrl: this.inputUrl,

        outPath: this.outDirectory,
        masterPlaylistName: this.streamingPlaylist.playlistFilename,

        latencyMode: this.videoLive.latencyMode,

        resolutions: this.allResolutions,
        fps: this.fps,
        bitrate: this.bitrate,
        ratio: this.ratio,

        availableEncoders: VideoTranscodingProfilesManager.Instance.getAvailableEncoders(),
        profile: CONFIG.LIVE.TRANSCODING.PROFILE
      })
      : getLiveMuxingCommand({
        inputUrl: this.inputUrl,
        outPath: this.outDirectory,
        masterPlaylistName: this.streamingPlaylist.playlistFilename,
        latencyMode: this.videoLive.latencyMode
      })

    logger.info('Running live muxing/transcoding for %s.', this.videoUUID, this.lTags())

    this.watchTSFiles()
    this.watchMasterFile()

    let ffmpegShellCommand: string
    this.ffmpegCommand.on('start', cmdline => {
      ffmpegShellCommand = cmdline

      logger.debug('Running ffmpeg command for live', { ffmpegShellCommand, ...this.lTags() })
    })

    this.ffmpegCommand.on('error', (err, stdout, stderr) => {
      this.onFFmpegError({ err, stdout, stderr, ffmpegShellCommand })
    })

    this.ffmpegCommand.on('end', () => {
      this.emit('ffmpeg-end', ({ videoId: this.videoId }))

      this.onFFmpegEnded()
    })

    this.ffmpegCommand.run()
  }

  abort () {
    if (!this.ffmpegCommand) return

    this.aborted = true
    this.ffmpegCommand.kill('SIGINT')
  }

  destroy () {
    this.removeAllListeners()
    this.isAbleToUploadVideoWithCache.clear()
    this.hasClientSocketInBadHealthWithCache.clear()
  }

  private onFFmpegError (options: {
    err: any
    stdout: string
    stderr: string
    ffmpegShellCommand: string
  }) {
    const { err, stdout, stderr, ffmpegShellCommand } = options

    this.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, ffmpegShellCommand, ...this.lTags() })

    this.emit('ffmpeg-error', ({ videoId: this.videoId }))
  }

  private onFFmpegEnded () {
    logger.info('RTMP transmuxing for video %s ended. Scheduling cleanup', this.inputUrl, this.lTags())

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

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

      this.emit('after-cleanup', { videoId: this.videoId })
    }, 1000)
  }

  private watchMasterFile () {
    this.masterWatcher = watch(this.outDirectory + '/' + this.streamingPlaylist.playlistFilename)

    this.masterWatcher.on('add', () => {
      this.emit('master-playlist-created', { videoId: this.videoId })

      this.masterWatcher.close()
        .catch(err => logger.error('Cannot close master watcher of %s.', this.outDirectory, { err, ...this.lTags() }))
    })
  }

  private watchTSFiles () {
    const startStreamDateTime = new Date().getTime()

    this.tsWatcher = watch(this.outDirectory + '/*.ts')

    const playlistIdMatcher = /^([\d+])-/

    const addHandler = async (segmentPath: string) => {
      logger.debug('Live add handler of %s.', segmentPath, this.lTags())

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

      const segmentsToProcess = this.segmentsToProcessPerPlaylist[playlistId] || []
      this.processSegments(segmentsToProcess)

      this.segmentsToProcessPerPlaylist[playlistId] = [ segmentPath ]

      if (this.hasClientSocketInBadHealthWithCache(this.sessionId)) {
        this.emit('bad-socket-health', { videoId: this.videoId })
        return
      }

      // Duration constraint check
      if (this.isDurationConstraintValid(startStreamDateTime) !== true) {
        this.emit('duration-exceeded', { videoId: this.videoId })
        return
      }

      // Check user quota if the user enabled replay saving
      if (await this.isQuotaExceeded(segmentPath) === true) {
        this.emit('quota-exceeded', { videoId: this.videoId })
      }
    }

    const deleteHandler = (segmentPath: string) => LiveSegmentShaStore.Instance.removeSegmentSha(this.videoUUID, segmentPath)

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

  private async isQuotaExceeded (segmentPath: string) {
    if (this.saveReplay !== true) return false
    if (this.aborted) return false

    try {
      const segmentStat = await stat(segmentPath)

      LiveQuotaStore.Instance.addQuotaTo(this.user.id, this.videoLive.id, segmentStat.size)

      const canUpload = await this.isAbleToUploadVideoWithCache(this.user.id)

      return canUpload !== true
    } catch (err) {
      logger.error('Cannot stat %s or check quota of %d.', segmentPath, this.user.id, { err, ...this.lTags() })
    }
  }

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

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

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

  private async prepareDirectories () {
    await ensureDir(this.outDirectory)

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

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

      if (this.saveReplay) {
        await this.addSegmentToReplay(previousSegment)
      }
    }).catch(err => {
      if (this.aborted) return

      logger.error('Cannot process segments', { err, ...this.lTags() })
    })
  }

  private hasClientSocketInBadHealth (sessionId: string) {
    const rtmpSession = this.context.sessions.get(sessionId)

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

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

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

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

    return false
  }

  private async addSegmentToReplay (segmentPath: string) {
    const segmentName = basename(segmentPath)
    const dest = join(this.replayDirectory, buildConcatenatedName(segmentName))

    try {
      const data = await readFile(segmentPath)

      await appendFile(dest, data)
    } catch (err) {
      logger.error('Cannot copy segment %s to replay directory.', segmentPath, { err, ...this.lTags() })
    }
  }
}

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

export {
  MuxingSession
}