PeerTube/server/lib/live-manager.ts

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import * as chokidar from 'chokidar'
import { FfmpegCommand } from 'fluent-ffmpeg'
import { copy, ensureDir, stat } from 'fs-extra'
import { basename, join } from 'path'
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import { isTestInstance } from '@server/helpers/core-utils'
import { getLiveMuxingCommand, getLiveTranscodingCommand } from '@server/helpers/ffmpeg-utils'
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import { computeResolutionsToTranscode, getVideoFileFPS, getVideoFileResolution } from '@server/helpers/ffprobe-utils'
import { logger } from '@server/helpers/logger'
import { CONFIG, registerConfigChangedHandler } from '@server/initializers/config'
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import { MEMOIZE_TTL, P2P_MEDIA_LOADER_PEER_VERSION, VIDEO_LIVE, VIEW_LIFETIME, WEBSERVER } from '@server/initializers/constants'
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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'
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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 { PeerTubeSocket } from './peertube-socket'
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import { isAbleToUploadVideo } from './user'
import { getHLSDirectory } from './video-paths'
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import { availableEncoders } from './video-transcoding-profiles'
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import memoizee = require('memoizee')
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const NodeRtmpServer = require('node-media-server/node_rtmp_server')
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>()
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// Values are Date().getTime()
private readonly watchersPerVideo = new Map<number, number[]>()
private readonly segmentsSha256 = new Map<string, Map<string, string>>()
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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 rtmpServer: any
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 => {
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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()
}
})
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// Cleanup broken lives, that were terminated by a server restart for example
this.handleBrokenLives()
.catch(err => logger.error('Cannot handle broken lives.', { err }))
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setInterval(() => this.updateLiveViews(), VIEW_LIFETIME.LIVE)
}
run () {
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logger.info('Running RTMP server on port %d', config.rtmp.port)
this.rtmpServer = new NodeRtmpServer(config)
this.rtmpServer.run()
}
stop () {
logger.info('Stopping RTMP server.')
this.rtmpServer.stop()
this.rtmpServer = undefined
}
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isRunning () {
return !!this.rtmpServer
}
getSegmentsSha256 (videoUUID: string) {
return this.segmentsSha256.get(videoUUID)
}
stopSessionOf (videoId: number) {
const sessionId = this.videoSessions.get(videoId)
if (!sessionId) return
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this.videoSessions.delete(videoId)
this.abortSession(sessionId)
}
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getLiveQuotaUsedByUser (userId: number) {
const currentLives = this.livesPerUser.get(userId)
if (!currentLives) return 0
return currentLives.reduce((sum, obj) => sum + obj.size, 0)
}
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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())
}
private getContext () {
return context
}
private abortSession (id: string) {
const session = this.getContext().sessions.get(id)
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if (session) {
session.stop()
this.getContext().sessions.delete(id)
}
const transSession = this.transSessions.get(id)
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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)
}
this.videoSessions.set(video.id, sessionId)
const playlistUrl = WEBSERVER.URL + VideoStreamingPlaylistModel.getHlsMasterPlaylistStaticPath(video.uuid)
const session = this.getContext().sessions.get(sessionId)
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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
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? 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,
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rtmpUrl,
fps,
allResolutions
})
}
private async runMuxing (options: {
sessionId: string
videoLive: MVideoLiveVideo
playlist: MStreamingPlaylist
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rtmpUrl: string
fps: number
allResolutions: number[]
}) {
const { sessionId, videoLive, playlist, allResolutions, fps, rtmpUrl } = options
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const startStreamDateTime = new Date().getTime()
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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]
VideoFileModel.upsert({
resolution,
size: -1,
extname: '.ts',
infoHash: null,
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fps,
videoStreamingPlaylistId: playlist.id
}).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)
}
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const videoUUID = videoLive.Video.uuid
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const ffmpegExec = CONFIG.LIVE.TRANSCODING.ENABLED
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? await getLiveTranscodingCommand({
rtmpUrl,
outPath,
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resolutions: allResolutions,
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fps,
availableEncoders,
profile: 'default'
})
: getLiveMuxingCommand(rtmpUrl, outPath)
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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+])-/
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const processSegments = (segmentsToProcess: string[]) => {
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// Add sha hash of previous segments, because ffmpeg should have finished generating them
for (const previousSegment of segmentsToProcess) {
this.addSegmentSha(videoUUID, previousSegment)
.catch(err => logger.error('Cannot add sha segment of video %s -> %s.', videoUUID, previousSegment, { err }))
if (videoLive.saveReplay) {
const segmentName = basename(previousSegment)
copy(previousSegment, join(outPath, VIDEO_LIVE.REPLAY_DIRECTORY, segmentName))
.catch(err => logger.error('Cannot copy segment %s to repay directory.', previousSegment, { err }))
}
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}
}
const addHandler = segmentPath => {
logger.debug('Live add handler of %s.', segmentPath)
const playlistId = basename(segmentPath).match(playlistIdMatcher)[0]
const segmentsToProcess = segmentsToProcessPerPlaylist[playlistId] || []
processSegments(segmentsToProcess)
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segmentsToProcessPerPlaylist[playlistId] = [ segmentPath ]
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// Duration constraint check
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if (this.isDurationConstraintValid(startStreamDateTime) !== true) {
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logger.info('Stopping session of %s: max duration exceeded.', videoUUID)
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this.stopSessionOf(videoLive.videoId)
}
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// Check user quota if the user enabled replay saving
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if (videoLive.saveReplay === true) {
stat(segmentPath)
.then(segmentStat => {
currentUserLive.size += segmentStat.size
})
.then(() => this.isQuotaConstraintValid(user, videoLive))
.then(quotaValid => {
if (quotaValid !== true) {
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logger.info('Stopping session of %s: user quota exceeded.', videoUUID)
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this.stopSessionOf(videoLive.videoId)
}
})
.catch(err => logger.error('Cannot stat %s or check quota of %d.', segmentPath, user.id, { err }))
}
}
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const deleteHandler = segmentPath => this.removeSegmentSha(videoUUID, segmentPath)
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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 = () => {
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logger.info('RTMP transmuxing for video %s ended. Scheduling cleanup', rtmpUrl)
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this.transSessions.delete(sessionId)
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this.watchersPerVideo.delete(videoLive.videoId)
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setTimeout(() => {
// Wait latest segments generation, and close watchers
Promise.all([ tsWatcher.close(), masterWatcher.close() ])
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.then(() => {
// Process remaining segments hash
for (const key of Object.keys(segmentsToProcessPerPlaylist)) {
processSegments(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
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if (err?.message?.includes('Exiting normally')) return
logger.error('Live transcoding error.', { err, stdout, stderr })
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this.abortSession(sessionId)
})
ffmpegExec.on('end', () => onFFmpegEnded())
ffmpegExec.run()
}
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private async onEndTransmuxing (videoId: number, cleanupNow = false) {
try {
const fullVideo = await VideoModel.loadAndPopulateAccountAndServerAndTags(videoId)
if (!fullVideo) return
JobQueue.Instance.createJob({
type: 'video-live-ending',
payload: {
videoId: fullVideo.id
}
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}, { delay: cleanupNow ? 0 : VIDEO_LIVE.CLEANUP_DELAY })
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fullVideo.state = VideoState.LIVE_ENDED
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 })
}
}
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private async addSegmentSha (videoUUID: string, segmentPath: string) {
const segmentName = basename(segmentPath)
logger.debug('Adding live sha segment %s.', segmentPath)
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const shaResult = await buildSha256Segment(segmentPath)
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if (!this.segmentsSha256.has(videoUUID)) {
this.segmentsSha256.set(videoUUID, new Map())
}
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const filesMap = this.segmentsSha256.get(videoUUID)
filesMap.set(segmentName, shaResult)
}
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private removeSegmentSha (videoUUID: string, segmentPath: string) {
const segmentName = basename(segmentPath)
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logger.debug('Removing live sha segment %s.', segmentPath)
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const filesMap = this.segmentsSha256.get(videoUUID)
if (!filesMap) {
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logger.warn('Unknown files map to remove sha for %s.', videoUUID)
return
}
if (!filesMap.has(segmentName)) {
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logger.warn('Unknown segment in files map for video %s and segment %s.', videoUUID, segmentPath)
return
}
filesMap.delete(segmentName)
}
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private isDurationConstraintValid (streamingStartTime: number) {
const maxDuration = CONFIG.LIVE.MAX_DURATION
// No limit
if (maxDuration === null) return true
const now = new Date().getTime()
const max = streamingStartTime + maxDuration
return now <= max
}
private async isQuotaConstraintValid (user: MUserId, live: MVideoLive) {
if (live.saveReplay !== true) return true
return this.isAbleToUploadVideoWithCache(user.id)
}
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private async updateLiveViews () {
if (!this.isRunning()) return
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if (!isTestInstance()) logger.info('Updating live video views.')
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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)
// 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)
}
}
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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
}