12 files changed, 523 insertions, 98 deletions

diff --git a/server/lib/activitypub/actor.ts b/server/lib/activitypub/actor.ts
index 8215840da..a3f379b76 100644
--- a/server/lib/activitypub/actor.ts
+++ b/server/lib/activitypub/actor.ts
@@ -355,10 +355,10 @@ async function fetchRemoteActor (actorUrl: string): Promise<{ statusCode?: numbe
 
   logger.info('Fetching remote actor %s.', actorUrl)
 
-  const requestResult = await doRequest(options)
+  const requestResult = await doRequest<ActivityPubActor>(options)
   normalizeActor(requestResult.body)
 
-  const actorJSON: ActivityPubActor = requestResult.body
+  const actorJSON = requestResult.body
   if (isActorObjectValid(actorJSON) === false) {
     logger.debug('Remote actor JSON is not valid.', { actorJSON })
     return { result: undefined, statusCode: requestResult.response.statusCode }
diff --git a/server/lib/activitypub/cache-file.ts b/server/lib/activitypub/cache-file.ts
index f6f068b45..9a40414bb 100644
--- a/server/lib/activitypub/cache-file.ts
+++ b/server/lib/activitypub/cache-file.ts
@@ -1,11 +1,28 @@
-import { CacheFileObject } from '../../../shared/index'
+import { ActivityPlaylistUrlObject, ActivityVideoUrlObject, CacheFileObject } from '../../../shared/index'
 import { VideoModel } from '../../models/video/video'
 import { VideoRedundancyModel } from '../../models/redundancy/video-redundancy'
 import { Transaction } from 'sequelize'
+import { VideoStreamingPlaylistType } from '../../../shared/models/videos/video-streaming-playlist.type'
 
 function cacheFileActivityObjectToDBAttributes (cacheFileObject: CacheFileObject, video: VideoModel, byActor: { id?: number }) {
-  const url = cacheFileObject.url
 
+  if (cacheFileObject.url.mediaType === 'application/x-mpegURL') {
+    const url = cacheFileObject.url
+
+    const playlist = video.VideoStreamingPlaylists.find(t => t.type === VideoStreamingPlaylistType.HLS)
+    if (!playlist) throw new Error('Cannot find HLS playlist of video ' + video.url)
+
+    return {
+      expiresOn: new Date(cacheFileObject.expires),
+      url: cacheFileObject.id,
+      fileUrl: url.href,
+      strategy: null,
+      videoStreamingPlaylistId: playlist.id,
+      actorId: byActor.id
+    }
+  }
+
+  const url = cacheFileObject.url
   const videoFile = video.VideoFiles.find(f => {
     return f.resolution === url.height && f.fps === url.fps
   })
@@ -15,7 +32,7 @@ function cacheFileActivityObjectToDBAttributes (cacheFileObject: CacheFileObject
   return {
     expiresOn: new Date(cacheFileObject.expires),
     url: cacheFileObject.id,
-    fileUrl: cacheFileObject.url.href,
+    fileUrl: url.href,
     strategy: null,
     videoFileId: videoFile.id,
     actorId: byActor.id
diff --git a/server/lib/activitypub/send/send-create.ts b/server/lib/activitypub/send/send-create.ts
index 73e667ad4..ef20e404c 100644
--- a/server/lib/activitypub/send/send-create.ts
+++ b/server/lib/activitypub/send/send-create.ts
@@ -23,17 +23,14 @@ async function sendCreateVideo (video: VideoModel, t: Transaction) {
   return broadcastToFollowers(createActivity, byActor, [ byActor ], t)
 }
 
-async function sendCreateCacheFile (byActor: ActorModel, fileRedundancy: VideoRedundancyModel) {
+async function sendCreateCacheFile (byActor: ActorModel, video: VideoModel, fileRedundancy: VideoRedundancyModel) {
   logger.info('Creating job to send file cache of %s.', fileRedundancy.url)
 
-  const video = await VideoModel.loadAndPopulateAccountAndServerAndTags(fileRedundancy.VideoFile.Video.id)
-  const redundancyObject = fileRedundancy.toActivityPubObject()
-
   return sendVideoRelatedCreateActivity({
     byActor,
     video,
     url: fileRedundancy.url,
-    object: redundancyObject
+    object: fileRedundancy.toActivityPubObject()
   })
 }
 
diff --git a/server/lib/activitypub/send/send-undo.ts b/server/lib/activitypub/send/send-undo.ts
index eb18a6cb6..ecbf605d6 100644
--- a/server/lib/activitypub/send/send-undo.ts
+++ b/server/lib/activitypub/send/send-undo.ts
@@ -73,7 +73,8 @@ async function sendUndoDislike (byActor: ActorModel, video: VideoModel, t: Trans
 async function sendUndoCacheFile (byActor: ActorModel, redundancyModel: VideoRedundancyModel, t: Transaction) {
   logger.info('Creating job to undo cache file %s.', redundancyModel.url)
 
-  const video = await VideoModel.loadAndPopulateAccountAndServerAndTags(redundancyModel.VideoFile.Video.id)
+  const videoId = redundancyModel.getVideo().id
+  const video = await VideoModel.loadAndPopulateAccountAndServerAndTags(videoId)
   const createActivity = buildCreateActivity(redundancyModel.url, byActor, redundancyModel.toActivityPubObject())
 
   return sendUndoVideoRelatedActivity({ byActor, video, url: redundancyModel.url, activity: createActivity, transaction: t })
diff --git a/server/lib/activitypub/send/send-update.ts b/server/lib/activitypub/send/send-update.ts
index a68f03edf..839f66470 100644
--- a/server/lib/activitypub/send/send-update.ts
+++ b/server/lib/activitypub/send/send-update.ts
@@ -61,7 +61,7 @@ async function sendUpdateActor (accountOrChannel: AccountModel | VideoChannelMod
 async function sendUpdateCacheFile (byActor: ActorModel, redundancyModel: VideoRedundancyModel) {
   logger.info('Creating job to update cache file %s.', redundancyModel.url)
 
-  const video = await VideoModel.loadAndPopulateAccountAndServerAndTags(redundancyModel.VideoFile.Video.id)
+  const video = await VideoModel.loadAndPopulateAccountAndServerAndTags(redundancyModel.getVideo().id)
 
   const activityBuilder = (audience: ActivityAudience) => {
     const redundancyObject = redundancyModel.toActivityPubObject()
diff --git a/server/lib/activitypub/url.ts b/server/lib/activitypub/url.ts
index 38f15448c..4229fe094 100644
--- a/server/lib/activitypub/url.ts
+++ b/server/lib/activitypub/url.ts
@@ -5,6 +5,8 @@ import { VideoModel } from '../../models/video/video'
 import { VideoAbuseModel } from '../../models/video/video-abuse'
 import { VideoCommentModel } from '../../models/video/video-comment'
 import { VideoFileModel } from '../../models/video/video-file'
+import { VideoStreamingPlaylist } from '../../../shared/models/videos/video-streaming-playlist.model'
+import { VideoStreamingPlaylistModel } from '../../models/video/video-streaming-playlist'
 
 function getVideoActivityPubUrl (video: VideoModel) {
   return CONFIG.WEBSERVER.URL + '/videos/watch/' + video.uuid
@@ -16,6 +18,10 @@ function getVideoCacheFileActivityPubUrl (videoFile: VideoFileModel) {
   return `${CONFIG.WEBSERVER.URL}/redundancy/videos/${videoFile.Video.uuid}/${videoFile.resolution}${suffixFPS}`
 }
 
+function getVideoCacheStreamingPlaylistActivityPubUrl (video: VideoModel, playlist: VideoStreamingPlaylistModel) {
+  return `${CONFIG.WEBSERVER.URL}/redundancy/video-playlists/${playlist.getStringType()}/${video.uuid}`
+}
+
 function getVideoCommentActivityPubUrl (video: VideoModel, videoComment: VideoCommentModel) {
   return CONFIG.WEBSERVER.URL + '/videos/watch/' + video.uuid + '/comments/' + videoComment.id
 }
@@ -92,6 +98,7 @@ function getUndoActivityPubUrl (originalUrl: string) {
 
 export {
   getVideoActivityPubUrl,
+  getVideoCacheStreamingPlaylistActivityPubUrl,
   getVideoChannelActivityPubUrl,
   getAccountActivityPubUrl,
   getVideoAbuseActivityPubUrl,
diff --git a/server/lib/activitypub/videos.ts b/server/lib/activitypub/videos.ts
index e1e523499..edd01234f 100644
--- a/server/lib/activitypub/videos.ts
+++ b/server/lib/activitypub/videos.ts
@@ -2,7 +2,14 @@ import * as Bluebird from 'bluebird'
 import * as sequelize from 'sequelize'
 import * as magnetUtil from 'magnet-uri'
 import * as request from 'request'
-import { ActivityIconObject, ActivityUrlObject, ActivityVideoUrlObject, VideoState } from '../../../shared/index'
+import {
+  ActivityIconObject,
+  ActivityPlaylistSegmentHashesObject,
+  ActivityPlaylistUrlObject,
+  ActivityUrlObject,
+  ActivityVideoUrlObject,
+  VideoState
+} from '../../../shared/index'
 import { VideoTorrentObject } from '../../../shared/models/activitypub/objects'
 import { VideoPrivacy } from '../../../shared/models/videos'
 import { sanitizeAndCheckVideoTorrentObject } from '../../helpers/custom-validators/activitypub/videos'
@@ -30,6 +37,9 @@ import { AccountModel } from '../../models/account/account'
 import { fetchVideoByUrl, VideoFetchByUrlType } from '../../helpers/video'
 import { checkUrlsSameHost, getAPId } from '../../helpers/activitypub'
 import { Notifier } from '../notifier'
+import { VideoStreamingPlaylistModel } from '../../models/video/video-streaming-playlist'
+import { VideoStreamingPlaylistType } from '../../../shared/models/videos/video-streaming-playlist.type'
+import { FilteredModelAttributes } from 'sequelize-typescript/lib/models/Model'
 
 async function federateVideoIfNeeded (video: VideoModel, isNewVideo: boolean, transaction?: sequelize.Transaction) {
   // If the video is not private and published, we federate it
@@ -264,6 +274,25 @@ async function updateVideoFromAP (options: {
       }
 
       {
+        const streamingPlaylistAttributes = streamingPlaylistActivityUrlToDBAttributes(options.video, options.videoObject)
+        const newStreamingPlaylists = streamingPlaylistAttributes.map(a => new VideoStreamingPlaylistModel(a))
+
+        // Remove video files that do not exist anymore
+        const destroyTasks = options.video.VideoStreamingPlaylists
+                                    .filter(f => !newStreamingPlaylists.find(newPlaylist => newPlaylist.hasSameUniqueKeysThan(f)))
+                                    .map(f => f.destroy(sequelizeOptions))
+        await Promise.all(destroyTasks)
+
+        // Update or add other one
+        const upsertTasks = streamingPlaylistAttributes.map(a => {
+          return VideoStreamingPlaylistModel.upsert<VideoStreamingPlaylistModel>(a, { returning: true, transaction: t })
+                               .then(([ streamingPlaylist ]) => streamingPlaylist)
+        })
+
+        options.video.VideoStreamingPlaylists = await Promise.all(upsertTasks)
+      }
+
+      {
         // Update Tags
         const tags = options.videoObject.tag.map(tag => tag.name)
         const tagInstances = await TagModel.findOrCreateTags(tags, t)
@@ -367,13 +396,25 @@ export {
 
 // ---------------------------------------------------------------------------
 
-function isActivityVideoUrlObject (url: ActivityUrlObject): url is ActivityVideoUrlObject {
+function isAPVideoUrlObject (url: ActivityUrlObject): url is ActivityVideoUrlObject {
   const mimeTypes = Object.keys(MIMETYPES.VIDEO.MIMETYPE_EXT)
 
   const urlMediaType = url.mediaType || url.mimeType
   return mimeTypes.indexOf(urlMediaType) !== -1 && urlMediaType.startsWith('video/')
 }
 
+function isAPStreamingPlaylistUrlObject (url: ActivityUrlObject): url is ActivityPlaylistUrlObject {
+  const urlMediaType = url.mediaType || url.mimeType
+
+  return urlMediaType === 'application/x-mpegURL'
+}
+
+function isAPPlaylistSegmentHashesUrlObject (tag: any): tag is ActivityPlaylistSegmentHashesObject {
+  const urlMediaType = tag.mediaType || tag.mimeType
+
+  return tag.name === 'sha256' && tag.type === 'Link' && urlMediaType === 'application/json'
+}
+
 async function createVideo (videoObject: VideoTorrentObject, channelActor: ActorModel, waitThumbnail = false) {
   logger.debug('Adding remote video %s.', videoObject.id)
 
@@ -394,8 +435,14 @@ async function createVideo (videoObject: VideoTorrentObject, channelActor: Actor
     const videoFilePromises = videoFileAttributes.map(f => VideoFileModel.create(f, { transaction: t }))
     await Promise.all(videoFilePromises)
 
+    const videoStreamingPlaylists = streamingPlaylistActivityUrlToDBAttributes(videoCreated, videoObject)
+    const playlistPromises = videoStreamingPlaylists.map(p => VideoStreamingPlaylistModel.create(p, { transaction: t }))
+    await Promise.all(playlistPromises)
+
     // Process tags
-    const tags = videoObject.tag.map(t => t.name)
+    const tags = videoObject.tag
+                            .filter(t => t.type === 'Hashtag')
+                            .map(t => t.name)
     const tagInstances = await TagModel.findOrCreateTags(tags, t)
     await videoCreated.$set('Tags', tagInstances, sequelizeOptions)
 
@@ -473,13 +520,13 @@ async function videoActivityObjectToDBAttributes (
 }
 
 function videoFileActivityUrlToDBAttributes (video: VideoModel, videoObject: VideoTorrentObject) {
-  const fileUrls = videoObject.url.filter(u => isActivityVideoUrlObject(u)) as ActivityVideoUrlObject[]
+  const fileUrls = videoObject.url.filter(u => isAPVideoUrlObject(u)) as ActivityVideoUrlObject[]
 
   if (fileUrls.length === 0) {
     throw new Error('Cannot find video files for ' + video.url)
   }
 
-  const attributes: VideoFileModel[] = []
+  const attributes: FilteredModelAttributes<VideoFileModel>[] = []
   for (const fileUrl of fileUrls) {
     // Fetch associated magnet uri
     const magnet = videoObject.url.find(u => {
@@ -502,7 +549,45 @@ function videoFileActivityUrlToDBAttributes (video: VideoModel, videoObject: Vid
       size: fileUrl.size,
       videoId: video.id,
       fps: fileUrl.fps || -1
-    } as VideoFileModel
+    }
+
+    attributes.push(attribute)
+  }
+
+  return attributes
+}
+
+function streamingPlaylistActivityUrlToDBAttributes (video: VideoModel, videoObject: VideoTorrentObject) {
+  const playlistUrls = videoObject.url.filter(u => isAPStreamingPlaylistUrlObject(u)) as ActivityPlaylistUrlObject[]
+  if (playlistUrls.length === 0) return []
+
+  const attributes: FilteredModelAttributes<VideoStreamingPlaylistModel>[] = []
+  for (const playlistUrlObject of playlistUrls) {
+    const p2pMediaLoaderInfohashes = playlistUrlObject.tag
+                                                      .filter(t => t.type === 'Infohash')
+                                                      .map(t => t.name)
+    if (p2pMediaLoaderInfohashes.length === 0) {
+      logger.warn('No infohashes found in AP playlist object.', { playlistUrl: playlistUrlObject })
+      continue
+    }
+
+    const segmentsSha256UrlObject = playlistUrlObject.tag
+                                                     .find(t => {
+                                                       return isAPPlaylistSegmentHashesUrlObject(t)
+                                                     }) as ActivityPlaylistSegmentHashesObject
+    if (!segmentsSha256UrlObject) {
+      logger.warn('No segment sha256 URL found in AP playlist object.', { playlistUrl: playlistUrlObject })
+      continue
+    }
+
+    const attribute = {
+      type: VideoStreamingPlaylistType.HLS,
+      playlistUrl: playlistUrlObject.href,
+      segmentsSha256Url: segmentsSha256UrlObject.href,
+      p2pMediaLoaderInfohashes,
+      videoId: video.id
+    }
+
     attributes.push(attribute)
   }
 
diff --git a/server/lib/emailer.ts b/server/lib/emailer.ts
index f384a254e..672414cc0 100644
--- a/server/lib/emailer.ts
+++ b/server/lib/emailer.ts
@@ -296,9 +296,9 @@ class Emailer {
     return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
   }
 
-  addForgetPasswordEmailJob (to: string, resetPasswordUrl: string) {
+  addPasswordResetEmailJob (to: string, resetPasswordUrl: string) {
     const text = `Hi dear user,\n\n` +
-      `It seems you forgot your password on ${CONFIG.WEBSERVER.HOST}! ` +
+      `A reset password procedure for your account ${to} has been requested on ${CONFIG.WEBSERVER.HOST} ` +
       `Please follow this link to reset it: ${resetPasswordUrl}\n\n` +
       `If you are not the person who initiated this request, please ignore this email.\n\n` +
       `Cheers,\n` +
diff --git a/server/lib/hls.ts b/server/lib/hls.ts
new file mode 100644
index 000000000..3575981f4
--- /dev/null
+++ b/server/lib/hls.ts
@@ -0,0 +1,164 @@
+import { VideoModel } from '../models/video/video'
+import { basename, join, dirname } from 'path'
+import { CONFIG, HLS_PLAYLIST_DIRECTORY } from '../initializers'
+import { close, ensureDir, move, open, outputJSON, pathExists, read, readFile, remove, writeFile } from 'fs-extra'
+import { getVideoFileSize } from '../helpers/ffmpeg-utils'
+import { sha256 } from '../helpers/core-utils'
+import { VideoStreamingPlaylistModel } from '../models/video/video-streaming-playlist'
+import { logger } from '../helpers/logger'
+import { doRequest, doRequestAndSaveToFile } from '../helpers/requests'
+import { generateRandomString } from '../helpers/utils'
+import { flatten, uniq } from 'lodash'
+
+async function updateMasterHLSPlaylist (video: VideoModel) {
+  const directory = join(HLS_PLAYLIST_DIRECTORY, video.uuid)
+  const masterPlaylists: string[] = [ '#EXTM3U', '#EXT-X-VERSION:3' ]
+  const masterPlaylistPath = join(directory, VideoStreamingPlaylistModel.getMasterHlsPlaylistFilename())
+
+  for (const file of video.VideoFiles) {
+    // If we did not generated a playlist for this resolution, skip
+    const filePlaylistPath = join(directory, VideoStreamingPlaylistModel.getHlsPlaylistFilename(file.resolution))
+    if (await pathExists(filePlaylistPath) === false) continue
+
+    const videoFilePath = video.getVideoFilePath(file)
+
+    const size = await getVideoFileSize(videoFilePath)
+
+    const bandwidth = 'BANDWIDTH=' + video.getBandwidthBits(file)
+    const resolution = `RESOLUTION=${size.width}x${size.height}`
+
+    let line = `#EXT-X-STREAM-INF:${bandwidth},${resolution}`
+    if (file.fps) line += ',FRAME-RATE=' + file.fps
+
+    masterPlaylists.push(line)
+    masterPlaylists.push(VideoStreamingPlaylistModel.getHlsPlaylistFilename(file.resolution))
+  }
+
+  await writeFile(masterPlaylistPath, masterPlaylists.join('\n') + '\n')
+}
+
+async function updateSha256Segments (video: VideoModel) {
+  const json: { [filename: string]: { [range: string]: string } } = {}
+
+  const playlistDirectory = join(HLS_PLAYLIST_DIRECTORY, video.uuid)
+
+  // For all the resolutions available for this video
+  for (const file of video.VideoFiles) {
+    const rangeHashes: { [range: string]: string } = {}
+
+    const videoPath = join(playlistDirectory, VideoStreamingPlaylistModel.getHlsVideoName(video.uuid, file.resolution))
+    const playlistPath = join(playlistDirectory, VideoStreamingPlaylistModel.getHlsPlaylistFilename(file.resolution))
+
+    // Maybe the playlist is not generated for this resolution yet
+    if (!await pathExists(playlistPath)) continue
+
+    const playlistContent = await readFile(playlistPath)
+    const ranges = getRangesFromPlaylist(playlistContent.toString())
+
+    const fd = await open(videoPath, 'r')
+    for (const range of ranges) {
+      const buf = Buffer.alloc(range.length)
+      await read(fd, buf, 0, range.length, range.offset)
+
+      rangeHashes[`${range.offset}-${range.offset + range.length - 1}`] = sha256(buf)
+    }
+    await close(fd)
+
+    const videoFilename = VideoStreamingPlaylistModel.getHlsVideoName(video.uuid, file.resolution)
+    json[videoFilename] = rangeHashes
+  }
+
+  const outputPath = join(playlistDirectory, VideoStreamingPlaylistModel.getHlsSha256SegmentsFilename())
+  await outputJSON(outputPath, json)
+}
+
+function getRangesFromPlaylist (playlistContent: string) {
+  const ranges: { offset: number, length: number }[] = []
+  const lines = playlistContent.split('\n')
+  const regex = /^#EXT-X-BYTERANGE:(\d+)@(\d+)$/
+
+  for (const line of lines) {
+    const captured = regex.exec(line)
+
+    if (captured) {
+      ranges.push({ length: parseInt(captured[1], 10), offset: parseInt(captured[2], 10) })
+    }
+  }
+
+  return ranges
+}
+
+function downloadPlaylistSegments (playlistUrl: string, destinationDir: string, timeout: number) {
+  let timer
+
+  logger.info('Importing HLS playlist %s', playlistUrl)
+
+  return new Promise<string>(async (res, rej) => {
+    const tmpDirectory = join(CONFIG.STORAGE.TMP_DIR, await generateRandomString(10))
+
+    await ensureDir(tmpDirectory)
+
+    timer = setTimeout(() => {
+      deleteTmpDirectory(tmpDirectory)
+
+      return rej(new Error('HLS download timeout.'))
+    }, timeout)
+
+    try {
+      // Fetch master playlist
+      const subPlaylistUrls = await fetchUniqUrls(playlistUrl)
+
+      const subRequests = subPlaylistUrls.map(u => fetchUniqUrls(u))
+      const fileUrls = uniq(flatten(await Promise.all(subRequests)))
+
+      logger.debug('Will download %d HLS files.', fileUrls.length, { fileUrls })
+
+      for (const fileUrl of fileUrls) {
+        const destPath = join(tmpDirectory, basename(fileUrl))
+
+        await doRequestAndSaveToFile({ uri: fileUrl }, destPath)
+      }
+
+      clearTimeout(timer)
+
+      await move(tmpDirectory, destinationDir, { overwrite: true })
+
+      return res()
+    } catch (err) {
+      deleteTmpDirectory(tmpDirectory)
+
+      return rej(err)
+    }
+  })
+
+  function deleteTmpDirectory (directory: string) {
+    remove(directory)
+      .catch(err => logger.error('Cannot delete path on HLS download error.', { err }))
+  }
+
+  async function fetchUniqUrls (playlistUrl: string) {
+    const { body } = await doRequest<string>({ uri: playlistUrl })
+
+    if (!body) return []
+
+    const urls = body.split('\n')
+      .filter(line => line.endsWith('.m3u8') || line.endsWith('.mp4'))
+      .map(url => {
+        if (url.startsWith('http://') || url.startsWith('https://')) return url
+
+        return `${dirname(playlistUrl)}/${url}`
+      })
+
+    return uniq(urls)
+  }
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  updateMasterHLSPlaylist,
+  updateSha256Segments,
+  downloadPlaylistSegments
+}
+
+// ---------------------------------------------------------------------------
diff --git a/server/lib/job-queue/handlers/video-file.ts b/server/lib/job-queue/handlers/video-file.ts
index 593e43cc5..04983155c 100644
--- a/server/lib/job-queue/handlers/video-file.ts
+++ b/server/lib/job-queue/handlers/video-file.ts
@@ -5,17 +5,18 @@ import { VideoModel } from '../../../models/video/video'
 import { JobQueue } from '../job-queue'
 import { federateVideoIfNeeded } from '../../activitypub'
 import { retryTransactionWrapper } from '../../../helpers/database-utils'
-import { sequelizeTypescript } from '../../../initializers'
+import { sequelizeTypescript, CONFIG } from '../../../initializers'
 import * as Bluebird from 'bluebird'
 import { computeResolutionsToTranscode } from '../../../helpers/ffmpeg-utils'
-import { importVideoFile, optimizeVideofile, transcodeOriginalVideofile } from '../../video-transcoding'
+import { generateHlsPlaylist, importVideoFile, optimizeVideofile, transcodeOriginalVideofile } from '../../video-transcoding'
 import { Notifier } from '../../notifier'
 
 export type VideoFilePayload = {
   videoUUID: string
-  isNewVideo?: boolean
   resolution?: VideoResolution
+  isNewVideo?: boolean
   isPortraitMode?: boolean
+  generateHlsPlaylist?: boolean
 }
 
 export type VideoFileImportPayload = {
@@ -51,21 +52,38 @@ async function processVideoFile (job: Bull.Job) {
     return undefined
   }
 
-  // Transcoding in other resolution
-  if (payload.resolution) {
+  if (payload.generateHlsPlaylist) {
+    await generateHlsPlaylist(video, payload.resolution, payload.isPortraitMode || false)
+
+    await retryTransactionWrapper(onHlsPlaylistGenerationSuccess, video)
+  } else if (payload.resolution) { // Transcoding in other resolution
     await transcodeOriginalVideofile(video, payload.resolution, payload.isPortraitMode || false)
 
-    await retryTransactionWrapper(onVideoFileTranscoderOrImportSuccess, video)
+    await retryTransactionWrapper(onVideoFileTranscoderOrImportSuccess, video, payload)
   } else {
     await optimizeVideofile(video)
 
-    await retryTransactionWrapper(onVideoFileOptimizerSuccess, video, payload.isNewVideo)
+    await retryTransactionWrapper(onVideoFileOptimizerSuccess, video, payload)
   }
 
   return video
 }
 
-async function onVideoFileTranscoderOrImportSuccess (video: VideoModel) {
+async function onHlsPlaylistGenerationSuccess (video: VideoModel) {
+  if (video === undefined) return undefined
+
+  await sequelizeTypescript.transaction(async t => {
+    // Maybe the video changed in database, refresh it
+    let videoDatabase = await VideoModel.loadAndPopulateAccountAndServerAndTags(video.uuid, t)
+    // Video does not exist anymore
+    if (!videoDatabase) return undefined
+
+    // If the video was not published, we consider it is a new one for other instances
+    await federateVideoIfNeeded(videoDatabase, false, t)
+  })
+}
+
+async function onVideoFileTranscoderOrImportSuccess (video: VideoModel, payload?: VideoFilePayload) {
   if (video === undefined) return undefined
 
   const { videoDatabase, videoPublished } = await sequelizeTypescript.transaction(async t => {
@@ -91,13 +109,16 @@ async function onVideoFileTranscoderOrImportSuccess (video: VideoModel) {
     return { videoDatabase, videoPublished }
   })
 
-  if (videoPublished) {
+  // don't notify prior to scheduled video update
+  if (videoPublished && !videoDatabase.ScheduleVideoUpdate) {
     Notifier.Instance.notifyOnNewVideo(videoDatabase)
     Notifier.Instance.notifyOnPendingVideoPublished(videoDatabase)
   }
+
+  await createHlsJobIfEnabled(payload)
 }
 
-async function onVideoFileOptimizerSuccess (videoArg: VideoModel, isNewVideo: boolean) {
+async function onVideoFileOptimizerSuccess (videoArg: VideoModel, payload: VideoFilePayload) {
   if (videoArg === undefined) return undefined
 
   // Outside the transaction (IO on disk)
@@ -144,13 +165,18 @@ async function onVideoFileOptimizerSuccess (videoArg: VideoModel, isNewVideo: bo
       logger.info('No transcoding jobs created for video %s (no resolutions).', videoDatabase.uuid, { privacy: videoDatabase.privacy })
     }
 
-    await federateVideoIfNeeded(videoDatabase, isNewVideo, t)
+    await federateVideoIfNeeded(videoDatabase, payload.isNewVideo, t)
 
     return { videoDatabase, videoPublished }
   })
 
-  if (isNewVideo) Notifier.Instance.notifyOnNewVideo(videoDatabase)
-  if (videoPublished) Notifier.Instance.notifyOnPendingVideoPublished(videoDatabase)
+  // don't notify prior to scheduled video update
+  if (!videoDatabase.ScheduleVideoUpdate) {
+    if (payload.isNewVideo) Notifier.Instance.notifyOnNewVideo(videoDatabase)
+    if (videoPublished) Notifier.Instance.notifyOnPendingVideoPublished(videoDatabase)
+  }
+
+  await createHlsJobIfEnabled(Object.assign({}, payload, { resolution: videoDatabase.getOriginalFile().resolution }))
 }
 
 // ---------------------------------------------------------------------------
@@ -159,3 +185,20 @@ export {
   processVideoFile,
   processVideoFileImport
 }
+
+// ---------------------------------------------------------------------------
+
+function createHlsJobIfEnabled (payload?: VideoFilePayload) {
+  // Generate HLS playlist?
+  if (payload && CONFIG.TRANSCODING.HLS.ENABLED) {
+    const hlsTranscodingPayload = {
+      videoUUID: payload.videoUUID,
+      resolution: payload.resolution,
+      isPortraitMode: payload.isPortraitMode,
+
+      generateHlsPlaylist: true
+    }
+
+    return JobQueue.Instance.createJob({ type: 'video-file', payload: hlsTranscodingPayload })
+  }
+}
diff --git a/server/lib/schedulers/videos-redundancy-scheduler.ts b/server/lib/schedulers/videos-redundancy-scheduler.ts
index f643ee226..1a48f2bd0 100644
--- a/server/lib/schedulers/videos-redundancy-scheduler.ts
+++ b/server/lib/schedulers/videos-redundancy-scheduler.ts
@@ -1,5 +1,5 @@
 import { AbstractScheduler } from './abstract-scheduler'
-import { CONFIG, REDUNDANCY, VIDEO_IMPORT_TIMEOUT } from '../../initializers'
+import { CONFIG, HLS_REDUNDANCY_DIRECTORY, REDUNDANCY, VIDEO_IMPORT_TIMEOUT } from '../../initializers'
 import { logger } from '../../helpers/logger'
 import { VideosRedundancy } from '../../../shared/models/redundancy'
 import { VideoRedundancyModel } from '../../models/redundancy/video-redundancy'
@@ -9,9 +9,19 @@ import { join } from 'path'
 import { move } from 'fs-extra'
 import { getServerActor } from '../../helpers/utils'
 import { sendCreateCacheFile, sendUpdateCacheFile } from '../activitypub/send'
-import { getVideoCacheFileActivityPubUrl } from '../activitypub/url'
+import { getVideoCacheFileActivityPubUrl, getVideoCacheStreamingPlaylistActivityPubUrl } from '../activitypub/url'
 import { removeVideoRedundancy } from '../redundancy'
 import { getOrCreateVideoAndAccountAndChannel } from '../activitypub'
+import { VideoStreamingPlaylistModel } from '../../models/video/video-streaming-playlist'
+import { VideoModel } from '../../models/video/video'
+import { downloadPlaylistSegments } from '../hls'
+
+type CandidateToDuplicate = {
+  redundancy: VideosRedundancy,
+  video: VideoModel,
+  files: VideoFileModel[],
+  streamingPlaylists: VideoStreamingPlaylistModel[]
+}
 
 export class VideosRedundancyScheduler extends AbstractScheduler {
 
@@ -24,28 +34,32 @@ export class VideosRedundancyScheduler extends AbstractScheduler {
   }
 
   protected async internalExecute () {
-    for (const obj of CONFIG.REDUNDANCY.VIDEOS.STRATEGIES) {
-      logger.info('Running redundancy scheduler for strategy %s.', obj.strategy)
+    for (const redundancyConfig of CONFIG.REDUNDANCY.VIDEOS.STRATEGIES) {
+      logger.info('Running redundancy scheduler for strategy %s.', redundancyConfig.strategy)
 
       try {
-        const videoToDuplicate = await this.findVideoToDuplicate(obj)
+        const videoToDuplicate = await this.findVideoToDuplicate(redundancyConfig)
         if (!videoToDuplicate) continue
 
-        const videoFiles = videoToDuplicate.VideoFiles
-        videoFiles.forEach(f => f.Video = videoToDuplicate)
+        const candidateToDuplicate = {
+          video: videoToDuplicate,
+          redundancy: redundancyConfig,
+          files: videoToDuplicate.VideoFiles,
+          streamingPlaylists: videoToDuplicate.VideoStreamingPlaylists
+        }
 
-        await this.purgeCacheIfNeeded(obj, videoFiles)
+        await this.purgeCacheIfNeeded(candidateToDuplicate)
 
-        if (await this.isTooHeavy(obj, videoFiles)) {
+        if (await this.isTooHeavy(candidateToDuplicate)) {
           logger.info('Video %s is too big for our cache, skipping.', videoToDuplicate.url)
           continue
         }
 
-        logger.info('Will duplicate video %s in redundancy scheduler "%s".', videoToDuplicate.url, obj.strategy)
+        logger.info('Will duplicate video %s in redundancy scheduler "%s".', videoToDuplicate.url, redundancyConfig.strategy)
 
-        await this.createVideoRedundancy(obj, videoFiles)
+        await this.createVideoRedundancies(candidateToDuplicate)
       } catch (err) {
-        logger.error('Cannot run videos redundancy %s.', obj.strategy, { err })
+        logger.error('Cannot run videos redundancy %s.', redundancyConfig.strategy, { err })
       }
     }
 
@@ -63,25 +77,35 @@ export class VideosRedundancyScheduler extends AbstractScheduler {
 
     for (const redundancyModel of expired) {
       try {
-        await this.extendsOrDeleteRedundancy(redundancyModel)
+        const redundancyConfig = CONFIG.REDUNDANCY.VIDEOS.STRATEGIES.find(s => s.strategy === redundancyModel.strategy)
+        const candidate = {
+          redundancy: redundancyConfig,
+          video: null,
+          files: [],
+          streamingPlaylists: []
+        }
+
+        // If the administrator disabled the redundancy or decreased the cache size, remove this redundancy instead of extending it
+        if (!redundancyConfig || await this.isTooHeavy(candidate)) {
+          logger.info('Destroying redundancy %s because the cache size %s is too heavy.', redundancyModel.url, redundancyModel.strategy)
+          await removeVideoRedundancy(redundancyModel)
+        } else {
+          await this.extendsRedundancy(redundancyModel)
+        }
       } catch (err) {
-        logger.error('Cannot extend expiration of %s video from our redundancy system.', this.buildEntryLogId(redundancyModel))
+        logger.error(
+          'Cannot extend or remove expiration of %s video from our redundancy system.', this.buildEntryLogId(redundancyModel),
+          { err }
+        )
       }
     }
   }
 
-  private async extendsOrDeleteRedundancy (redundancyModel: VideoRedundancyModel) {
-    // Refresh the video, maybe it was deleted
-    const video = await this.loadAndRefreshVideo(redundancyModel.VideoFile.Video.url)
-
-    if (!video) {
-      logger.info('Destroying existing redundancy %s, because the associated video does not exist anymore.', redundancyModel.url)
-
-      await redundancyModel.destroy()
-      return
-    }
-
+  private async extendsRedundancy (redundancyModel: VideoRedundancyModel) {
     const redundancy = CONFIG.REDUNDANCY.VIDEOS.STRATEGIES.find(s => s.strategy === redundancyModel.strategy)
+    // Redundancy strategy disabled, remove our redundancy instead of extending expiration
+    if (!redundancy) await removeVideoRedundancy(redundancyModel)
+
     await this.extendsExpirationOf(redundancyModel, redundancy.minLifetime)
   }
 
@@ -112,49 +136,93 @@ export class VideosRedundancyScheduler extends AbstractScheduler {
     }
   }
 
-  private async createVideoRedundancy (redundancy: VideosRedundancy, filesToDuplicate: VideoFileModel[]) {
-    const serverActor = await getServerActor()
+  private async createVideoRedundancies (data: CandidateToDuplicate) {
+    const video = await this.loadAndRefreshVideo(data.video.url)
+
+    if (!video) {
+      logger.info('Video %s we want to duplicate does not existing anymore, skipping.', data.video.url)
 
-    for (const file of filesToDuplicate) {
-      const video = await this.loadAndRefreshVideo(file.Video.url)
+      return
+    }
 
+    for (const file of data.files) {
       const existingRedundancy = await VideoRedundancyModel.loadLocalByFileId(file.id)
       if (existingRedundancy) {
-        await this.extendsOrDeleteRedundancy(existingRedundancy)
+        await this.extendsRedundancy(existingRedundancy)
 
         continue
       }
 
-      if (!video) {
-        logger.info('Video %s we want to duplicate does not existing anymore, skipping.', file.Video.url)
+      await this.createVideoFileRedundancy(data.redundancy, video, file)
+    }
+
+    for (const streamingPlaylist of data.streamingPlaylists) {
+      const existingRedundancy = await VideoRedundancyModel.loadLocalByStreamingPlaylistId(streamingPlaylist.id)
+      if (existingRedundancy) {
+        await this.extendsRedundancy(existingRedundancy)
 
         continue
       }
 
-      logger.info('Duplicating %s - %d in videos redundancy with "%s" strategy.', video.url, file.resolution, redundancy.strategy)
+      await this.createStreamingPlaylistRedundancy(data.redundancy, video, streamingPlaylist)
+    }
+  }
 
-      const { baseUrlHttp, baseUrlWs } = video.getBaseUrls()
-      const magnetUri = video.generateMagnetUri(file, baseUrlHttp, baseUrlWs)
+  private async createVideoFileRedundancy (redundancy: VideosRedundancy, video: VideoModel, file: VideoFileModel) {
+    file.Video = video
 
-      const tmpPath = await downloadWebTorrentVideo({ magnetUri }, VIDEO_IMPORT_TIMEOUT)
+    const serverActor = await getServerActor()
 
-      const destPath = join(CONFIG.STORAGE.REDUNDANCY_DIR, video.getVideoFilename(file))
-      await move(tmpPath, destPath)
+    logger.info('Duplicating %s - %d in videos redundancy with "%s" strategy.', video.url, file.resolution, redundancy.strategy)
 
-      const createdModel = await VideoRedundancyModel.create({
-        expiresOn: this.buildNewExpiration(redundancy.minLifetime),
-        url: getVideoCacheFileActivityPubUrl(file),
-        fileUrl: video.getVideoRedundancyUrl(file, CONFIG.WEBSERVER.URL),
-        strategy: redundancy.strategy,
-        videoFileId: file.id,
-        actorId: serverActor.id
-      })
-      createdModel.VideoFile = file
+    const { baseUrlHttp, baseUrlWs } = video.getBaseUrls()
+    const magnetUri = video.generateMagnetUri(file, baseUrlHttp, baseUrlWs)
 
-      await sendCreateCacheFile(serverActor, createdModel)
+    const tmpPath = await downloadWebTorrentVideo({ magnetUri }, VIDEO_IMPORT_TIMEOUT)
 
-      logger.info('Duplicated %s - %d -> %s.', video.url, file.resolution, createdModel.url)
-    }
+    const destPath = join(CONFIG.STORAGE.REDUNDANCY_DIR, video.getVideoFilename(file))
+    await move(tmpPath, destPath)
+
+    const createdModel = await VideoRedundancyModel.create({
+      expiresOn: this.buildNewExpiration(redundancy.minLifetime),
+      url: getVideoCacheFileActivityPubUrl(file),
+      fileUrl: video.getVideoRedundancyUrl(file, CONFIG.WEBSERVER.URL),
+      strategy: redundancy.strategy,
+      videoFileId: file.id,
+      actorId: serverActor.id
+    })
+
+    createdModel.VideoFile = file
+
+    await sendCreateCacheFile(serverActor, video, createdModel)
+
+    logger.info('Duplicated %s - %d -> %s.', video.url, file.resolution, createdModel.url)
+  }
+
+  private async createStreamingPlaylistRedundancy (redundancy: VideosRedundancy, video: VideoModel, playlist: VideoStreamingPlaylistModel) {
+    playlist.Video = video
+
+    const serverActor = await getServerActor()
+
+    logger.info('Duplicating %s streaming playlist in videos redundancy with "%s" strategy.', video.url, redundancy.strategy)
+
+    const destDirectory = join(HLS_REDUNDANCY_DIRECTORY, video.uuid)
+    await downloadPlaylistSegments(playlist.playlistUrl, destDirectory, VIDEO_IMPORT_TIMEOUT)
+
+    const createdModel = await VideoRedundancyModel.create({
+      expiresOn: this.buildNewExpiration(redundancy.minLifetime),
+      url: getVideoCacheStreamingPlaylistActivityPubUrl(video, playlist),
+      fileUrl: playlist.getVideoRedundancyUrl(CONFIG.WEBSERVER.URL),
+      strategy: redundancy.strategy,
+      videoStreamingPlaylistId: playlist.id,
+      actorId: serverActor.id
+    })
+
+    createdModel.VideoStreamingPlaylist = playlist
+
+    await sendCreateCacheFile(serverActor, video, createdModel)
+
+    logger.info('Duplicated playlist %s -> %s.', playlist.playlistUrl, createdModel.url)
   }
 
   private async extendsExpirationOf (redundancy: VideoRedundancyModel, expiresAfterMs: number) {
@@ -168,8 +236,9 @@ export class VideosRedundancyScheduler extends AbstractScheduler {
     await sendUpdateCacheFile(serverActor, redundancy)
   }
 
-  private async purgeCacheIfNeeded (redundancy: VideosRedundancy, filesToDuplicate: VideoFileModel[]) {
-    while (this.isTooHeavy(redundancy, filesToDuplicate)) {
+  private async purgeCacheIfNeeded (candidateToDuplicate: CandidateToDuplicate) {
+    while (this.isTooHeavy(candidateToDuplicate)) {
+      const redundancy = candidateToDuplicate.redundancy
       const toDelete = await VideoRedundancyModel.loadOldestLocalThatAlreadyExpired(redundancy.strategy, redundancy.minLifetime)
       if (!toDelete) return
 
@@ -177,11 +246,11 @@ export class VideosRedundancyScheduler extends AbstractScheduler {
     }
   }
 
-  private async isTooHeavy (redundancy: VideosRedundancy, filesToDuplicate: VideoFileModel[]) {
-    const maxSize = redundancy.size
+  private async isTooHeavy (candidateToDuplicate: CandidateToDuplicate) {
+    const maxSize = candidateToDuplicate.redundancy.size
 
-    const totalDuplicated = await VideoRedundancyModel.getTotalDuplicated(redundancy.strategy)
-    const totalWillDuplicate = totalDuplicated + this.getTotalFileSizes(filesToDuplicate)
+    const totalDuplicated = await VideoRedundancyModel.getTotalDuplicated(candidateToDuplicate.redundancy.strategy)
+    const totalWillDuplicate = totalDuplicated + this.getTotalFileSizes(candidateToDuplicate.files, candidateToDuplicate.streamingPlaylists)
 
     return totalWillDuplicate > maxSize
   }
@@ -191,13 +260,15 @@ export class VideosRedundancyScheduler extends AbstractScheduler {
   }
 
   private buildEntryLogId (object: VideoRedundancyModel) {
-    return `${object.VideoFile.Video.url}-${object.VideoFile.resolution}`
+    if (object.VideoFile) return `${object.VideoFile.Video.url}-${object.VideoFile.resolution}`
+
+    return `${object.VideoStreamingPlaylist.playlistUrl}`
   }
 
-  private getTotalFileSizes (files: VideoFileModel[]) {
+  private getTotalFileSizes (files: VideoFileModel[], playlists: VideoStreamingPlaylistModel[]) {
     const fileReducer = (previous: number, current: VideoFileModel) => previous + current.size
 
-    return files.reduce(fileReducer, 0)
+    return files.reduce(fileReducer, 0) * playlists.length
   }
 
   private async loadAndRefreshVideo (videoUrl: string) {
diff --git a/server/lib/video-transcoding.ts b/server/lib/video-transcoding.ts
index 4460f46e4..086b860a2 100644
--- a/server/lib/video-transcoding.ts
+++ b/server/lib/video-transcoding.ts
@@ -1,11 +1,14 @@
-import { CONFIG } from '../initializers'
+import { CONFIG, HLS_PLAYLIST_DIRECTORY } from '../initializers'
 import { extname, join } from 'path'
 import { getVideoFileFPS, getVideoFileResolution, transcode } from '../helpers/ffmpeg-utils'
-import { copy, remove, move, stat } from 'fs-extra'
+import { copy, ensureDir, move, remove, stat } from 'fs-extra'
 import { logger } from '../helpers/logger'
 import { VideoResolution } from '../../shared/models/videos'
 import { VideoFileModel } from '../models/video/video-file'
 import { VideoModel } from '../models/video/video'
+import { updateMasterHLSPlaylist, updateSha256Segments } from './hls'
+import { VideoStreamingPlaylistModel } from '../models/video/video-streaming-playlist'
+import { VideoStreamingPlaylistType } from '../../shared/models/videos/video-streaming-playlist.type'
 
 async function optimizeVideofile (video: VideoModel, inputVideoFileArg?: VideoFileModel) {
   const videosDirectory = CONFIG.STORAGE.VIDEOS_DIR
@@ -17,7 +20,8 @@ async function optimizeVideofile (video: VideoModel, inputVideoFileArg?: VideoFi
 
   const transcodeOptions = {
     inputPath: videoInputPath,
-    outputPath: videoTranscodedPath
+    outputPath: videoTranscodedPath,
+    resolution: inputVideoFile.resolution
   }
 
   // Could be very long!
@@ -47,7 +51,7 @@ async function optimizeVideofile (video: VideoModel, inputVideoFileArg?: VideoFi
   }
 }
 
-async function transcodeOriginalVideofile (video: VideoModel, resolution: VideoResolution, isPortraitMode: boolean) {
+async function transcodeOriginalVideofile (video: VideoModel, resolution: VideoResolution, isPortrait: boolean) {
   const videosDirectory = CONFIG.STORAGE.VIDEOS_DIR
   const extname = '.mp4'
 
@@ -60,13 +64,13 @@ async function transcodeOriginalVideofile (video: VideoModel, resolution: VideoR
     size: 0,
     videoId: video.id
   })
-  const videoOutputPath = join(videosDirectory, video.getVideoFilename(newVideoFile))
+  const videoOutputPath = join(CONFIG.STORAGE.VIDEOS_DIR, video.getVideoFilename(newVideoFile))
 
   const transcodeOptions = {
     inputPath: videoInputPath,
     outputPath: videoOutputPath,
     resolution,
-    isPortraitMode
+    isPortraitMode: isPortrait
   }
 
   await transcode(transcodeOptions)
@@ -84,6 +88,41 @@ async function transcodeOriginalVideofile (video: VideoModel, resolution: VideoR
   video.VideoFiles.push(newVideoFile)
 }
 
+async function generateHlsPlaylist (video: VideoModel, resolution: VideoResolution, isPortraitMode: boolean) {
+  const baseHlsDirectory = join(HLS_PLAYLIST_DIRECTORY, video.uuid)
+  await ensureDir(join(HLS_PLAYLIST_DIRECTORY, video.uuid))
+
+  const videoInputPath = join(CONFIG.STORAGE.VIDEOS_DIR, video.getVideoFilename(video.getOriginalFile()))
+  const outputPath = join(baseHlsDirectory, VideoStreamingPlaylistModel.getHlsPlaylistFilename(resolution))
+
+  const transcodeOptions = {
+    inputPath: videoInputPath,
+    outputPath,
+    resolution,
+    isPortraitMode,
+
+    hlsPlaylist: {
+      videoFilename: VideoStreamingPlaylistModel.getHlsVideoName(video.uuid, resolution)
+    }
+  }
+
+  await transcode(transcodeOptions)
+
+  await updateMasterHLSPlaylist(video)
+  await updateSha256Segments(video)
+
+  const playlistUrl = CONFIG.WEBSERVER.URL + VideoStreamingPlaylistModel.getHlsMasterPlaylistStaticPath(video.uuid)
+
+  await VideoStreamingPlaylistModel.upsert({
+    videoId: video.id,
+    playlistUrl,
+    segmentsSha256Url: CONFIG.WEBSERVER.URL + VideoStreamingPlaylistModel.getHlsSha256SegmentsStaticPath(video.uuid),
+    p2pMediaLoaderInfohashes: VideoStreamingPlaylistModel.buildP2PMediaLoaderInfoHashes(playlistUrl, video.VideoFiles),
+
+    type: VideoStreamingPlaylistType.HLS
+  })
+}
+
 async function importVideoFile (video: VideoModel, inputFilePath: string) {
   const { videoFileResolution } = await getVideoFileResolution(inputFilePath)
   const { size } = await stat(inputFilePath)
@@ -125,6 +164,7 @@ async function importVideoFile (video: VideoModel, inputFilePath: string) {
 }
 
 export {
+  generateHlsPlaylist,
   optimizeVideofile,
   transcodeOriginalVideofile,
   importVideoFile