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 { availableEncoders } 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() private readonly videoSessions = new Map() // Values are Date().getTime() private readonly watchersPerVideo = new Map() private readonly segmentsSha256 = new Map>() private readonly livesPerUser = new Map() 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, 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 }