342 lines
11 KiB
TypeScript
342 lines
11 KiB
TypeScript
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import * as Bluebird from 'bluebird'
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import * as chokidar from 'chokidar'
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import { FfmpegCommand } from 'fluent-ffmpeg'
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import { appendFile, ensureDir, readFile, stat } from 'fs-extra'
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import { basename, join } from 'path'
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import { EventEmitter } from 'stream'
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import { getLiveMuxingCommand, getLiveTranscodingCommand } from '@server/helpers/ffmpeg-utils'
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import { logger, loggerTagsFactory, LoggerTagsFn } from '@server/helpers/logger'
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import { CONFIG } from '@server/initializers/config'
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import { MEMOIZE_TTL, VIDEO_LIVE } from '@server/initializers/constants'
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import { VideoFileModel } from '@server/models/video/video-file'
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import { MStreamingPlaylistVideo, MUserId, MVideoLiveVideo } from '@server/types/models'
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import { VideoTranscodingProfilesManager } from '../../transcoding/video-transcoding-profiles'
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import { isAbleToUploadVideo } from '../../user'
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import { getHLSDirectory } from '../../video-paths'
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import { LiveQuotaStore } from '../live-quota-store'
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import { LiveSegmentShaStore } from '../live-segment-sha-store'
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import { buildConcatenatedName } from '../live-utils'
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import memoizee = require('memoizee')
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interface MuxingSessionEvents {
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'master-playlist-created': ({ videoId: number }) => void
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'bad-socket-health': ({ videoId: number }) => void
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'duration-exceeded': ({ videoId: number }) => void
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'quota-exceeded': ({ videoId: number }) => void
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'ffmpeg-end': ({ videoId: number }) => void
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'ffmpeg-error': ({ sessionId: string }) => void
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'after-cleanup': ({ videoId: number }) => void
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}
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declare interface MuxingSession {
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on<U extends keyof MuxingSessionEvents>(
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event: U, listener: MuxingSessionEvents[U]
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): this
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emit<U extends keyof MuxingSessionEvents>(
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event: U, ...args: Parameters<MuxingSessionEvents[U]>
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): boolean
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}
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class MuxingSession extends EventEmitter {
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private ffmpegCommand: FfmpegCommand
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private readonly context: any
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private readonly user: MUserId
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private readonly sessionId: string
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private readonly videoLive: MVideoLiveVideo
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private readonly streamingPlaylist: MStreamingPlaylistVideo
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private readonly rtmpUrl: string
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private readonly fps: number
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private readonly allResolutions: number[]
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private readonly videoId: number
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private readonly videoUUID: string
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private readonly saveReplay: boolean
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private readonly lTags: LoggerTagsFn
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private segmentsToProcessPerPlaylist: { [playlistId: string]: string[] } = {}
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private tsWatcher: chokidar.FSWatcher
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private masterWatcher: chokidar.FSWatcher
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private readonly isAbleToUploadVideoWithCache = memoizee((userId: number) => {
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return isAbleToUploadVideo(userId, 1000)
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}, { maxAge: MEMOIZE_TTL.LIVE_ABLE_TO_UPLOAD })
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private readonly hasClientSocketInBadHealthWithCache = memoizee((sessionId: string) => {
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return this.hasClientSocketInBadHealth(sessionId)
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}, { maxAge: MEMOIZE_TTL.LIVE_CHECK_SOCKET_HEALTH })
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constructor (options: {
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context: any
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user: MUserId
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sessionId: string
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videoLive: MVideoLiveVideo
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streamingPlaylist: MStreamingPlaylistVideo
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rtmpUrl: string
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fps: number
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allResolutions: number[]
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}) {
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super()
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this.context = options.context
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this.user = options.user
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this.sessionId = options.sessionId
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this.videoLive = options.videoLive
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this.streamingPlaylist = options.streamingPlaylist
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this.rtmpUrl = options.rtmpUrl
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this.fps = options.fps
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this.allResolutions = options.allResolutions
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this.videoId = this.videoLive.Video.id
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this.videoUUID = this.videoLive.Video.uuid
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this.saveReplay = this.videoLive.saveReplay
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this.lTags = loggerTagsFactory('live', this.sessionId, this.videoUUID)
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}
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async runMuxing () {
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this.createFiles()
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const outPath = await this.prepareDirectories()
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this.ffmpegCommand = CONFIG.LIVE.TRANSCODING.ENABLED
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? await getLiveTranscodingCommand({
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rtmpUrl: this.rtmpUrl,
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outPath,
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resolutions: this.allResolutions,
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fps: this.fps,
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availableEncoders: VideoTranscodingProfilesManager.Instance.getAvailableEncoders(),
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profile: CONFIG.LIVE.TRANSCODING.PROFILE
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})
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: getLiveMuxingCommand(this.rtmpUrl, outPath)
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logger.info('Running live muxing/transcoding for %s.', this.videoUUID, this.lTags)
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this.watchTSFiles(outPath)
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this.watchMasterFile(outPath)
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this.ffmpegCommand.on('error', (err, stdout, stderr) => {
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this.onFFmpegError(err, stdout, stderr, outPath)
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})
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this.ffmpegCommand.on('end', () => this.onFFmpegEnded(outPath))
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this.ffmpegCommand.run()
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}
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abort () {
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if (!this.ffmpegCommand) return false
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this.ffmpegCommand.kill('SIGINT')
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return true
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}
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private onFFmpegError (err: any, stdout: string, stderr: string, outPath: string) {
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this.onFFmpegEnded(outPath)
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// Don't care that we killed the ffmpeg process
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if (err?.message?.includes('Exiting normally')) return
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logger.error('Live transcoding error.', { err, stdout, stderr, ...this.lTags })
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this.emit('ffmpeg-error', ({ sessionId: this.sessionId }))
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}
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private onFFmpegEnded (outPath: string) {
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logger.info('RTMP transmuxing for video %s ended. Scheduling cleanup', this.rtmpUrl, this.lTags)
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setTimeout(() => {
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// Wait latest segments generation, and close watchers
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Promise.all([ this.tsWatcher.close(), this.masterWatcher.close() ])
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.then(() => {
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// Process remaining segments hash
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for (const key of Object.keys(this.segmentsToProcessPerPlaylist)) {
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this.processSegments(outPath, this.segmentsToProcessPerPlaylist[key])
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}
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})
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.catch(err => {
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logger.error(
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'Cannot close watchers of %s or process remaining hash segments.', outPath,
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{ err, ...this.lTags }
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)
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})
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this.emit('after-cleanup', { videoId: this.videoId })
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}, 1000)
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}
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private watchMasterFile (outPath: string) {
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this.masterWatcher = chokidar.watch(outPath + '/master.m3u8')
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this.masterWatcher.on('add', async () => {
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this.emit('master-playlist-created', { videoId: this.videoId })
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this.masterWatcher.close()
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.catch(err => logger.error('Cannot close master watcher of %s.', outPath, { err, ...this.lTags }))
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})
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}
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private watchTSFiles (outPath: string) {
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const startStreamDateTime = new Date().getTime()
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this.tsWatcher = chokidar.watch(outPath + '/*.ts')
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const playlistIdMatcher = /^([\d+])-/
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const addHandler = async segmentPath => {
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logger.debug('Live add handler of %s.', segmentPath, this.lTags)
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const playlistId = basename(segmentPath).match(playlistIdMatcher)[0]
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const segmentsToProcess = this.segmentsToProcessPerPlaylist[playlistId] || []
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this.processSegments(outPath, segmentsToProcess)
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this.segmentsToProcessPerPlaylist[playlistId] = [ segmentPath ]
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if (this.hasClientSocketInBadHealthWithCache(this.sessionId)) {
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this.emit('bad-socket-health', { videoId: this.videoId })
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return
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}
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// Duration constraint check
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if (this.isDurationConstraintValid(startStreamDateTime) !== true) {
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this.emit('duration-exceeded', { videoId: this.videoId })
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return
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}
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// Check user quota if the user enabled replay saving
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if (await this.isQuotaExceeded(segmentPath) === true) {
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this.emit('quota-exceeded', { videoId: this.videoId })
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}
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}
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const deleteHandler = segmentPath => LiveSegmentShaStore.Instance.removeSegmentSha(this.videoUUID, segmentPath)
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this.tsWatcher.on('add', p => addHandler(p))
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this.tsWatcher.on('unlink', p => deleteHandler(p))
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}
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private async isQuotaExceeded (segmentPath: string) {
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if (this.saveReplay !== true) return false
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try {
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const segmentStat = await stat(segmentPath)
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LiveQuotaStore.Instance.addQuotaTo(this.user.id, this.videoLive.id, segmentStat.size)
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const canUpload = await this.isAbleToUploadVideoWithCache(this.user.id)
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return canUpload !== true
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} catch (err) {
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logger.error('Cannot stat %s or check quota of %d.', segmentPath, this.user.id, { err, ...this.lTags })
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}
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}
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private createFiles () {
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for (let i = 0; i < this.allResolutions.length; i++) {
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const resolution = this.allResolutions[i]
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const file = new VideoFileModel({
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resolution,
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size: -1,
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extname: '.ts',
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infoHash: null,
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fps: this.fps,
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videoStreamingPlaylistId: this.streamingPlaylist.id
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})
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VideoFileModel.customUpsert(file, 'streaming-playlist', null)
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.catch(err => logger.error('Cannot create file for live streaming.', { err, ...this.lTags }))
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}
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}
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private async prepareDirectories () {
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const outPath = getHLSDirectory(this.videoLive.Video)
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await ensureDir(outPath)
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const replayDirectory = join(outPath, VIDEO_LIVE.REPLAY_DIRECTORY)
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if (this.videoLive.saveReplay === true) {
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await ensureDir(replayDirectory)
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}
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return outPath
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}
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private isDurationConstraintValid (streamingStartTime: number) {
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const maxDuration = CONFIG.LIVE.MAX_DURATION
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// No limit
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if (maxDuration < 0) return true
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const now = new Date().getTime()
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const max = streamingStartTime + maxDuration
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return now <= max
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}
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private processSegments (hlsVideoPath: string, segmentPaths: string[]) {
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Bluebird.mapSeries(segmentPaths, async previousSegment => {
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// Add sha hash of previous segments, because ffmpeg should have finished generating them
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await LiveSegmentShaStore.Instance.addSegmentSha(this.videoUUID, previousSegment)
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if (this.saveReplay) {
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await this.addSegmentToReplay(hlsVideoPath, previousSegment)
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}
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}).catch(err => logger.error('Cannot process segments in %s', hlsVideoPath, { err, ...this.lTags }))
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}
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private hasClientSocketInBadHealth (sessionId: string) {
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const rtmpSession = this.context.sessions.get(sessionId)
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if (!rtmpSession) {
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logger.warn('Cannot get session %s to check players socket health.', sessionId, this.lTags)
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return
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}
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for (const playerSessionId of rtmpSession.players) {
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const playerSession = this.context.sessions.get(playerSessionId)
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if (!playerSession) {
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logger.error('Cannot get player session %s to check socket health.', playerSession, this.lTags)
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continue
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}
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if (playerSession.socket.writableLength > VIDEO_LIVE.MAX_SOCKET_WAITING_DATA) {
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return true
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}
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}
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return false
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}
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private async addSegmentToReplay (hlsVideoPath: string, segmentPath: string) {
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const segmentName = basename(segmentPath)
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const dest = join(hlsVideoPath, VIDEO_LIVE.REPLAY_DIRECTORY, buildConcatenatedName(segmentName))
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try {
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const data = await readFile(segmentPath)
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await appendFile(dest, data)
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} catch (err) {
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logger.error('Cannot copy segment %s to replay directory.', segmentPath, { err, ...this.lTags })
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}
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}
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}
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// ---------------------------------------------------------------------------
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export {
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MuxingSession
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}
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