21 files changed, 457 insertions, 93 deletions

diff --git a/server/helpers/activitypub.ts b/server/helpers/activitypub.ts
index 02a9d4026..08aef2908 100644
--- a/server/helpers/activitypub.ts
+++ b/server/helpers/activitypub.ts
@@ -201,10 +201,12 @@ function checkUrlsSameHost (url1: string, url2: string) {
   return idHost && actorHost && idHost.toLowerCase() === actorHost.toLowerCase()
 }
 
-function buildRemoteVideoBaseUrl (video: MVideoWithHost, path: string) {
+function buildRemoteVideoBaseUrl (video: MVideoWithHost, path: string, scheme?: string) {
+  if (!scheme) scheme = REMOTE_SCHEME.HTTP
+
   const host = video.VideoChannel.Actor.Server.host
 
-  return REMOTE_SCHEME.HTTP + '://' + host + path
+  return scheme + '://' + host + path
 }
 
 // ---------------------------------------------------------------------------
diff --git a/server/helpers/custom-validators/activitypub/videos.ts b/server/helpers/custom-validators/activitypub/videos.ts
index a01429c83..a41d37810 100644
--- a/server/helpers/custom-validators/activitypub/videos.ts
+++ b/server/helpers/custom-validators/activitypub/videos.ts
@@ -1,4 +1,7 @@
 import validator from 'validator'
+import { logger } from '@server/helpers/logger'
+import { ActivityTrackerUrlObject, ActivityVideoFileMetadataUrlObject } from '@shared/models'
+import { VideoState } from '../../../../shared/models/videos'
 import { ACTIVITY_PUB, CONSTRAINTS_FIELDS } from '../../../initializers/constants'
 import { peertubeTruncate } from '../../core-utils'
 import { exists, isArray, isBooleanValid, isDateValid, isUUIDValid } from '../misc'
@@ -11,9 +14,6 @@ import {
   isVideoViewsValid
 } from '../videos'
 import { isActivityPubUrlValid, isBaseActivityValid, setValidAttributedTo } from './misc'
-import { VideoState } from '../../../../shared/models/videos'
-import { logger } from '@server/helpers/logger'
-import { ActivityVideoFileMetadataObject } from '@shared/models'
 
 function sanitizeAndCheckVideoTorrentUpdateActivity (activity: any) {
   return isBaseActivityValid(activity, 'Update') &&
@@ -84,6 +84,7 @@ function sanitizeAndCheckVideoTorrentObject (video: any) {
 
 function isRemoteVideoUrlValid (url: any) {
   return url.type === 'Link' &&
+    // Video file link
     (
       ACTIVITY_PUB.URL_MIME_TYPES.VIDEO.includes(url.mediaType) &&
       isActivityPubUrlValid(url.href) &&
@@ -91,31 +92,41 @@ function isRemoteVideoUrlValid (url: any) {
       validator.isInt(url.size + '', { min: 0 }) &&
       (!url.fps || validator.isInt(url.fps + '', { min: -1 }))
     ) ||
+    // Torrent link
     (
       ACTIVITY_PUB.URL_MIME_TYPES.TORRENT.includes(url.mediaType) &&
       isActivityPubUrlValid(url.href) &&
       validator.isInt(url.height + '', { min: 0 })
     ) ||
+    // Magnet link
     (
       ACTIVITY_PUB.URL_MIME_TYPES.MAGNET.includes(url.mediaType) &&
       validator.isLength(url.href, { min: 5 }) &&
       validator.isInt(url.height + '', { min: 0 })
     ) ||
+    // HLS playlist link
     (
       (url.mediaType || url.mimeType) === 'application/x-mpegURL' &&
       isActivityPubUrlValid(url.href) &&
       isArray(url.tag)
     ) ||
-    isAPVideoFileMetadataObject(url)
+    isAPVideoTrackerUrlObject(url) ||
+    isAPVideoFileUrlMetadataObject(url)
 }
 
-function isAPVideoFileMetadataObject (url: any): url is ActivityVideoFileMetadataObject {
+function isAPVideoFileUrlMetadataObject (url: any): url is ActivityVideoFileMetadataUrlObject {
   return url &&
     url.type === 'Link' &&
     url.mediaType === 'application/json' &&
     isArray(url.rel) && url.rel.includes('metadata')
 }
 
+function isAPVideoTrackerUrlObject (url: any): url is ActivityTrackerUrlObject {
+  return isArray(url.rel) &&
+    url.rel.includes('tracker') &&
+    isActivityPubUrlValid(url.href)
+}
+
 // ---------------------------------------------------------------------------
 
 export {
@@ -123,7 +134,8 @@ export {
   isRemoteStringIdentifierValid,
   sanitizeAndCheckVideoTorrentObject,
   isRemoteVideoUrlValid,
-  isAPVideoFileMetadataObject
+  isAPVideoFileUrlMetadataObject,
+  isAPVideoTrackerUrlObject
 }
 
 // ---------------------------------------------------------------------------
diff --git a/server/helpers/webtorrent.ts b/server/helpers/webtorrent.ts
index 73418aa0a..4e08c27c6 100644
--- a/server/helpers/webtorrent.ts
+++ b/server/helpers/webtorrent.ts
@@ -107,16 +107,13 @@ async function createTorrentAndSetInfoHash (
   videoFile.torrentFilename = torrentFilename
 }
 
-// FIXME: merge/refactor videoOrPlaylist and video arguments
 function generateMagnetUri (
-  videoOrPlaylist: MVideo | MStreamingPlaylistVideo,
   video: MVideoWithHost,
   videoFile: MVideoFileRedundanciesOpt,
-  baseUrlHttp: string,
-  baseUrlWs: string
+  trackerUrls: string[]
 ) {
   const xs = videoFile.getTorrentUrl()
-  const announce = videoOrPlaylist.getTrackerUrls(baseUrlHttp, baseUrlWs)
+  const announce = trackerUrls
   let urlList = [ videoFile.getFileUrl(video) ]
 
   const redundancies = videoFile.RedundancyVideos
diff --git a/server/initializers/constants.ts b/server/initializers/constants.ts
index c4c7ffdac..fbedc2164 100644
--- a/server/initializers/constants.ts
+++ b/server/initializers/constants.ts
@@ -24,7 +24,7 @@ import { CONFIG, registerConfigChangedHandler } from './config'
 
 // ---------------------------------------------------------------------------
 
-const LAST_MIGRATION_VERSION = 585
+const LAST_MIGRATION_VERSION = 595
 
 // ---------------------------------------------------------------------------
 
diff --git a/server/initializers/database.ts b/server/initializers/database.ts
index 61768234f..1f2b6d521 100644
--- a/server/initializers/database.ts
+++ b/server/initializers/database.ts
@@ -1,3 +1,5 @@
+import { TrackerModel } from '@server/models/server/tracker'
+import { VideoTrackerModel } from '@server/models/server/video-tracker'
 import { QueryTypes, Transaction } from 'sequelize'
 import { Sequelize as SequelizeTypescript } from 'sequelize-typescript'
 import { isTestInstance } from '../helpers/core-utils'
@@ -128,6 +130,8 @@ async function initDatabaseModels (silent: boolean) {
     VideoPlaylistModel,
     VideoPlaylistElementModel,
     ThumbnailModel,
+    TrackerModel,
+    VideoTrackerModel,
     PluginModel
   ])
 
diff --git a/server/initializers/migrations/0590-trackers.ts b/server/initializers/migrations/0590-trackers.ts
new file mode 100644
index 000000000..47b9022a3
--- /dev/null
+++ b/server/initializers/migrations/0590-trackers.ts
@@ -0,0 +1,44 @@
+import * as Sequelize from 'sequelize'
+
+async function up (utils: {
+  transaction: Sequelize.Transaction
+  queryInterface: Sequelize.QueryInterface
+  sequelize: Sequelize.Sequelize
+  db: any
+}): Promise<void> {
+  {
+    const query = `CREATE TABLE IF NOT EXISTS "tracker" (
+      "id" serial,
+      "url" varchar(255) NOT NULL,
+      "createdAt" timestamp WITH time zone NOT NULL,
+      "updatedAt" timestamp WITH time zone NOT NULL,
+      PRIMARY KEY ("id")
+    );`
+
+    await utils.sequelize.query(query)
+  }
+
+  {
+    const query = `CREATE TABLE IF NOT EXISTS "videoTracker" (
+      "videoId" integer REFERENCES "video" ("id") ON DELETE CASCADE ON UPDATE CASCADE,
+      "trackerId" integer REFERENCES "tracker" ("id") ON DELETE CASCADE ON UPDATE CASCADE,
+      "createdAt" timestamp WITH time zone NOT NULL,
+      "updatedAt" timestamp WITH time zone NOT NULL,
+      UNIQUE ("videoId", "trackerId"),
+      PRIMARY KEY ("videoId", "trackerId")
+    );`
+
+    await utils.sequelize.query(query)
+  }
+
+  await utils.sequelize.query(`CREATE UNIQUE INDEX "tracker_url" ON "tracker" ("url")`)
+}
+
+function down (options) {
+  throw new Error('Not implemented.')
+}
+
+export {
+  up,
+  down
+}
diff --git a/server/initializers/migrations/0595-remote-url.ts b/server/initializers/migrations/0595-remote-url.ts
new file mode 100644
index 000000000..85b367555
--- /dev/null
+++ b/server/initializers/migrations/0595-remote-url.ts
@@ -0,0 +1,130 @@
+import * as Sequelize from 'sequelize'
+
+async function up (utils: {
+  transaction: Sequelize.Transaction
+  queryInterface: Sequelize.QueryInterface
+  sequelize: Sequelize.Sequelize
+  db: any
+}): Promise<void> {
+
+  // Torrent and file URLs
+  {
+    const fromQueryWebtorrent = `SELECT 'https://' || server.host AS "serverUrl", '/static/webseed/' AS "filePath", "videoFile".id ` +
+      `FROM video ` +
+      `INNER JOIN "videoChannel" ON "videoChannel".id = video."channelId" ` +
+      `INNER JOIN actor ON actor.id = "videoChannel"."actorId" ` +
+      `INNER JOIN server ON server.id = actor."serverId" ` +
+      `INNER JOIN "videoFile" ON "videoFile"."videoId" = video.id ` +
+      `WHERE video.remote IS TRUE`
+
+    const fromQueryHLS = `SELECT 'https://' || server.host AS "serverUrl", ` +
+      `'/static/streaming-playlists/hls/' || video.uuid || '/' AS "filePath", "videoFile".id ` +
+      `FROM video ` +
+      `INNER JOIN "videoChannel" ON "videoChannel".id = video."channelId" ` +
+      `INNER JOIN actor ON actor.id = "videoChannel"."actorId" ` +
+      `INNER JOIN server ON server.id = actor."serverId" ` +
+      `INNER JOIN "videoStreamingPlaylist" ON "videoStreamingPlaylist"."videoId" = video.id ` +
+      `INNER JOIN "videoFile" ON "videoFile"."videoStreamingPlaylistId" = "videoStreamingPlaylist".id ` +
+      `WHERE video.remote IS TRUE`
+
+    for (const fromQuery of [ fromQueryWebtorrent, fromQueryHLS ]) {
+      const query = `UPDATE "videoFile" ` +
+        `SET "torrentUrl" = t."serverUrl" || '/static/torrents/' || "videoFile"."torrentFilename", ` +
+        `"fileUrl" = t."serverUrl" || t."filePath" || "videoFile"."filename" ` +
+        `FROM (${fromQuery}) AS t WHERE t.id = "videoFile"."id" AND "videoFile"."fileUrl" IS NULL`
+
+      await utils.sequelize.query(query)
+    }
+  }
+
+  // Caption URLs
+  {
+    const fromQuery = `SELECT 'https://' || server.host AS "serverUrl", "video".uuid, "videoCaption".id ` +
+      `FROM video ` +
+      `INNER JOIN "videoChannel" ON "videoChannel".id = video."channelId" ` +
+      `INNER JOIN actor ON actor.id = "videoChannel"."actorId" ` +
+      `INNER JOIN server ON server.id = actor."serverId" ` +
+      `INNER JOIN "videoCaption" ON "videoCaption"."videoId" = video.id ` +
+      `WHERE video.remote IS TRUE`
+
+    const query = `UPDATE "videoCaption" ` +
+      `SET "fileUrl" = t."serverUrl" || '/lazy-static/video-captions/' || t.uuid || '-' || "videoCaption"."language" || '.vtt' ` +
+      `FROM (${fromQuery}) AS t WHERE t.id = "videoCaption"."id" AND "videoCaption"."fileUrl" IS NULL`
+
+    await utils.sequelize.query(query)
+  }
+
+  // Thumbnail URLs
+  {
+    const fromQuery = `SELECT 'https://' || server.host AS "serverUrl", "video".uuid, "thumbnail".id ` +
+      `FROM video ` +
+      `INNER JOIN "videoChannel" ON "videoChannel".id = video."channelId" ` +
+      `INNER JOIN actor ON actor.id = "videoChannel"."actorId" ` +
+      `INNER JOIN server ON server.id = actor."serverId" ` +
+      `INNER JOIN "thumbnail" ON "thumbnail"."videoId" = video.id ` +
+      `WHERE video.remote IS TRUE`
+
+    // Thumbnails
+    {
+      const query = `UPDATE "thumbnail" ` +
+        `SET "fileUrl" = t."serverUrl" || '/static/thumbnails/' || t.uuid || '.jpg' ` +
+        `FROM (${fromQuery}) AS t WHERE t.id = "thumbnail"."id" AND "thumbnail"."fileUrl" IS NULL AND thumbnail.type = 1`
+
+      await utils.sequelize.query(query)
+    }
+
+    {
+      // Previews
+      const query = `UPDATE "thumbnail" ` +
+        `SET "fileUrl" = t."serverUrl" || '/lazy-static/previews/' || t.uuid || '.jpg' ` +
+        `FROM (${fromQuery}) AS t WHERE t.id = "thumbnail"."id" AND "thumbnail"."fileUrl" IS NULL AND thumbnail.type = 2`
+
+      await utils.sequelize.query(query)
+    }
+  }
+
+  // Trackers
+  {
+    const trackerUrls = [
+      `'https://' || server.host  || '/tracker/announce'`,
+      `'wss://' || server.host  || '/tracker/socket'`
+    ]
+
+    for (const trackerUrl of trackerUrls) {
+      {
+        const query = `INSERT INTO "tracker" ("url", "createdAt", "updatedAt") ` +
+          `SELECT ${trackerUrl} AS "url", NOW(), NOW() ` +
+          `FROM video ` +
+          `INNER JOIN "videoChannel" ON "videoChannel".id = video."channelId" ` +
+          `INNER JOIN actor ON actor.id = "videoChannel"."actorId" ` +
+          `INNER JOIN server ON server.id = actor."serverId" ` +
+          `WHERE video.remote IS TRUE ` +
+          `ON CONFLICT DO NOTHING`
+
+        await utils.sequelize.query(query)
+      }
+
+      {
+        const query = `INSERT INTO "videoTracker" ("videoId", "trackerId", "createdAt", "updatedAt") ` +
+          `SELECT video.id, (SELECT tracker.id FROM tracker WHERE url = ${trackerUrl}) AS "trackerId", NOW(), NOW()` +
+          `FROM video ` +
+          `INNER JOIN "videoChannel" ON "videoChannel".id = video."channelId" ` +
+          `INNER JOIN actor ON actor.id = "videoChannel"."actorId" ` +
+          `INNER JOIN server ON server.id = actor."serverId" ` +
+          `WHERE video.remote IS TRUE`
+
+        await utils.sequelize.query(query)
+      }
+    }
+  }
+
+}
+
+function down (options) {
+  throw new Error('Not implemented.')
+}
+
+export {
+  up,
+  down
+}
diff --git a/server/lib/activitypub/videos.ts b/server/lib/activitypub/videos.ts
index a5f6537eb..66330a964 100644
--- a/server/lib/activitypub/videos.ts
+++ b/server/lib/activitypub/videos.ts
@@ -3,7 +3,8 @@ import { maxBy, minBy } from 'lodash'
 import * as magnetUtil from 'magnet-uri'
 import { basename, join } from 'path'
 import * as request from 'request'
-import * as sequelize from 'sequelize'
+import { Transaction } from 'sequelize/types'
+import { TrackerModel } from '@server/models/server/tracker'
 import { VideoLiveModel } from '@server/models/video/video-live'
 import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 import {
@@ -16,12 +17,16 @@ import {
   ActivityUrlObject,
   ActivityVideoUrlObject
 } from '../../../shared/index'
-import { ActivityIconObject, VideoObject } from '../../../shared/models/activitypub/objects'
+import { ActivityIconObject, ActivityTrackerUrlObject, VideoObject } from '../../../shared/models/activitypub/objects'
 import { VideoPrivacy } from '../../../shared/models/videos'
 import { ThumbnailType } from '../../../shared/models/videos/thumbnail.type'
 import { VideoStreamingPlaylistType } from '../../../shared/models/videos/video-streaming-playlist.type'
 import { buildRemoteVideoBaseUrl, checkUrlsSameHost, getAPId } from '../../helpers/activitypub'
-import { isAPVideoFileMetadataObject, sanitizeAndCheckVideoTorrentObject } from '../../helpers/custom-validators/activitypub/videos'
+import {
+  isAPVideoFileUrlMetadataObject,
+  isAPVideoTrackerUrlObject,
+  sanitizeAndCheckVideoTorrentObject
+} from '../../helpers/custom-validators/activitypub/videos'
 import { isArray } from '../../helpers/custom-validators/misc'
 import { isVideoFileInfoHashValid } from '../../helpers/custom-validators/videos'
 import { deleteNonExistingModels, resetSequelizeInstance, retryTransactionWrapper } from '../../helpers/database-utils'
@@ -83,7 +88,7 @@ import { addVideoShares, shareVideoByServerAndChannel } from './share'
 import { addVideoComments } from './video-comments'
 import { createRates } from './video-rates'
 
-async function federateVideoIfNeeded (videoArg: MVideoAPWithoutCaption, isNewVideo: boolean, transaction?: sequelize.Transaction) {
+async function federateVideoIfNeeded (videoArg: MVideoAPWithoutCaption, isNewVideo: boolean, transaction?: Transaction) {
   const video = videoArg as MVideoAP
 
   if (
@@ -433,6 +438,12 @@ async function updateVideoFromAP (options: {
         await setVideoTags({ video: videoUpdated, tags, transaction: t, defaultValue: videoUpdated.Tags })
       }
 
+      // Update trackers
+      {
+        const trackers = getTrackerUrls(videoObject, videoUpdated)
+        await setVideoTrackers({ video: videoUpdated, trackers, transaction: t })
+      }
+
       {
         // Update captions
         await VideoCaptionModel.deleteAllCaptionsOfRemoteVideo(videoUpdated.id, t)
@@ -577,7 +588,7 @@ function isAPVideoUrlObject (url: any): url is ActivityVideoUrlObject {
   return MIMETYPES.VIDEO.MIMETYPE_EXT[urlMediaType] && urlMediaType.startsWith('video/')
 }
 
-function isAPStreamingPlaylistUrlObject (url: ActivityUrlObject): url is ActivityPlaylistUrlObject {
+function isAPStreamingPlaylistUrlObject (url: any): url is ActivityPlaylistUrlObject {
   return url && url.mediaType === 'application/x-mpegURL'
 }
 
@@ -671,6 +682,12 @@ async function createVideo (videoObject: VideoObject, channel: MChannelAccountLi
       })
       await Promise.all(videoCaptionsPromises)
 
+      // Process trackers
+      {
+        const trackers = getTrackerUrls(videoObject, videoCreated)
+        await setVideoTrackers({ video: videoCreated, trackers, transaction: t })
+      }
+
       videoCreated.VideoFiles = videoFiles
 
       if (videoCreated.isLive) {
@@ -797,7 +814,7 @@ function videoFileActivityUrlToDBAttributes (
       : parsed.xs
 
     // Fetch associated metadata url, if any
-    const metadata = urls.filter(isAPVideoFileMetadataObject)
+    const metadata = urls.filter(isAPVideoFileUrlMetadataObject)
                          .find(u => {
                            return u.height === fileUrl.height &&
                              u.fps === fileUrl.fps &&
@@ -889,3 +906,33 @@ function getPreviewUrl (previewIcon: ActivityIconObject, video: MVideoWithHost)
     ? previewIcon.url
     : buildRemoteVideoBaseUrl(video, join(LAZY_STATIC_PATHS.PREVIEWS, video.generatePreviewName()))
 }
+
+function getTrackerUrls (object: VideoObject, video: MVideoWithHost) {
+  let wsFound = false
+
+  const trackers = object.url.filter(u => isAPVideoTrackerUrlObject(u))
+    .map((u: ActivityTrackerUrlObject) => {
+      if (u.rel.includes('websocket')) wsFound = true
+
+      return u.href
+    })
+
+  if (wsFound) return trackers
+
+  return [
+    buildRemoteVideoBaseUrl(video, '/tracker/socket', REMOTE_SCHEME.WS),
+    buildRemoteVideoBaseUrl(video, '/tracker/announce')
+  ]
+}
+
+async function setVideoTrackers (options: {
+  video: MVideo
+  trackers: string[]
+  transaction?: Transaction
+}) {
+  const { video, trackers, transaction } = options
+
+  const trackerInstances = await TrackerModel.findOrCreateTrackers(trackers, transaction)
+
+  await video.$set('Trackers', trackerInstances, { transaction })
+}
diff --git a/server/lib/schedulers/videos-redundancy-scheduler.ts b/server/lib/schedulers/videos-redundancy-scheduler.ts
index 60008e695..9e2667416 100644
--- a/server/lib/schedulers/videos-redundancy-scheduler.ts
+++ b/server/lib/schedulers/videos-redundancy-scheduler.ts
@@ -1,6 +1,7 @@
 import { move } from 'fs-extra'
 import { join } from 'path'
 import { getServerActor } from '@server/models/application/application'
+import { TrackerModel } from '@server/models/server/tracker'
 import { VideoModel } from '@server/models/video/video'
 import {
   MStreamingPlaylist,
@@ -221,8 +222,8 @@ export class VideosRedundancyScheduler extends AbstractScheduler {
 
     logger.info('Duplicating %s - %d in videos redundancy with "%s" strategy.', video.url, file.resolution, strategy)
 
-    const { baseUrlHttp, baseUrlWs } = video.getBaseUrls()
-    const magnetUri = generateMagnetUri(video, video, file, baseUrlHttp, baseUrlWs)
+    const trackerUrls = await TrackerModel.listUrlsByVideoId(video.id)
+    const magnetUri = generateMagnetUri(video, file, trackerUrls)
 
     const tmpPath = await downloadWebTorrentVideo({ magnetUri }, VIDEO_IMPORT_TIMEOUT)
 
diff --git a/server/lib/thumbnail.ts b/server/lib/thumbnail.ts
index 4bad8d6ca..49317df28 100644
--- a/server/lib/thumbnail.ts
+++ b/server/lib/thumbnail.ts
@@ -1,5 +1,6 @@
 import { copy } from 'fs-extra'
 import { join } from 'path'
+import { logger } from '@server/helpers/logger'
 import { ThumbnailType } from '../../shared/models/videos/thumbnail.type'
 import { generateImageFromVideoFile } from '../helpers/ffmpeg-utils'
 import { processImage } from '../helpers/image-utils'
@@ -62,7 +63,7 @@ function createVideoMiniatureFromUrl (options: {
   size?: ImageSize
 }) {
   const { downloadUrl, video, type, size } = options
-  const { filename, basePath, height, width, existingThumbnail } = buildMetadataFromVideo(video, type, size)
+  const { filename: updatedFilename, basePath, height, width, existingThumbnail } = buildMetadataFromVideo(video, type, size)
 
   // Only save the file URL if it is a remote video
   const fileUrl = video.isOwned()
@@ -76,10 +77,16 @@ function createVideoMiniatureFromUrl (options: {
 
   // If the thumbnail URL did not change and has a unique filename (introduced in 3.2), avoid thumbnail processing
   const thumbnailUrlChanged = !existingUrl || existingUrl !== downloadUrl || downloadUrl.endsWith(`${video.uuid}.jpg`)
+
+  // Do not change the thumbnail filename if the file did not change
+  const filename = thumbnailUrlChanged
+    ? updatedFilename
+    : existingThumbnail.filename
+
   const thumbnailCreator = () => {
     if (thumbnailUrlChanged) return downloadImage(downloadUrl, basePath, filename, { width, height })
 
-    return copy(existingThumbnail.getPath(), ThumbnailModel.buildPath(type, filename))
+    return Promise.resolve()
   }
 
   return createThumbnailFromFunction({ thumbnailCreator, filename, height, width, type, existingThumbnail, fileUrl })
@@ -236,7 +243,7 @@ async function createThumbnailFromFunction (parameters: {
     fileUrl = null
   } = parameters
 
-  const oldFilename = existingThumbnail
+  const oldFilename = existingThumbnail && existingThumbnail.filename !== filename
     ? existingThumbnail.filename
     : undefined
 
@@ -248,7 +255,8 @@ async function createThumbnailFromFunction (parameters: {
   thumbnail.type = type
   thumbnail.fileUrl = fileUrl
   thumbnail.automaticallyGenerated = automaticallyGenerated
-  thumbnail.previousThumbnailFilename = oldFilename
+
+  if (oldFilename) thumbnail.previousThumbnailFilename = oldFilename
 
   await thumbnailCreator()
 
diff --git a/server/models/server/tracker.ts b/server/models/server/tracker.ts
new file mode 100644
index 000000000..d7c91faad
--- /dev/null
+++ b/server/models/server/tracker.ts
@@ -0,0 +1,73 @@
+import { AllowNull, BelongsToMany, Column, CreatedAt, Model, Table, UpdatedAt } from 'sequelize-typescript'
+import { Transaction } from 'sequelize/types'
+import { MTracker } from '@server/types/models/server/tracker'
+import { VideoModel } from '../video/video'
+import { VideoTrackerModel } from './video-tracker'
+
+@Table({
+  tableName: 'tracker',
+  indexes: [
+    {
+      fields: [ 'url' ],
+      unique: true
+    }
+  ]
+})
+export class TrackerModel extends Model {
+
+  @AllowNull(false)
+  @Column
+  url: string
+
+  @CreatedAt
+  createdAt: Date
+
+  @UpdatedAt
+  updatedAt: Date
+
+  @BelongsToMany(() => VideoModel, {
+    foreignKey: 'trackerId',
+    through: () => VideoTrackerModel,
+    onDelete: 'CASCADE'
+  })
+  Videos: VideoModel[]
+
+  static listUrlsByVideoId (videoId: number) {
+    const query = {
+      include: [
+        {
+          attributes: [ 'id', 'trackerId' ],
+          model: VideoModel.unscoped(),
+          required: true,
+          where: { id: videoId }
+        }
+      ]
+    }
+
+    return TrackerModel.findAll(query)
+      .then(rows => rows.map(rows => rows.url))
+  }
+
+  static findOrCreateTrackers (trackers: string[], transaction: Transaction): Promise<MTracker[]> {
+    if (trackers === null) return Promise.resolve([])
+
+    const tasks: Promise<MTracker>[] = []
+    trackers.forEach(tracker => {
+      const query = {
+        where: {
+          url: tracker
+        },
+        defaults: {
+          url: tracker
+        },
+        transaction
+      }
+
+      const promise = TrackerModel.findOrCreate<MTracker>(query)
+        .then(([ trackerInstance ]) => trackerInstance)
+      tasks.push(promise)
+    })
+
+    return Promise.all(tasks)
+  }
+}
diff --git a/server/models/server/video-tracker.ts b/server/models/server/video-tracker.ts
new file mode 100644
index 000000000..367bf0117
--- /dev/null
+++ b/server/models/server/video-tracker.ts
@@ -0,0 +1,30 @@
+import { Column, CreatedAt, ForeignKey, Model, Table, UpdatedAt } from 'sequelize-typescript'
+import { VideoModel } from '../video/video'
+import { TrackerModel } from './tracker'
+
+@Table({
+  tableName: 'videoTracker',
+  indexes: [
+    {
+      fields: [ 'videoId' ]
+    },
+    {
+      fields: [ 'trackerId' ]
+    }
+  ]
+})
+export class VideoTrackerModel extends Model {
+  @CreatedAt
+  createdAt: Date
+
+  @UpdatedAt
+  updatedAt: Date
+
+  @ForeignKey(() => VideoModel)
+  @Column
+  videoId: number
+
+  @ForeignKey(() => TrackerModel)
+  @Column
+  trackerId: number
+}
diff --git a/server/models/video/thumbnail.ts b/server/models/video/thumbnail.ts
index 9533c8d19..319e1175a 100644
--- a/server/models/video/thumbnail.ts
+++ b/server/models/video/thumbnail.ts
@@ -15,7 +15,6 @@ import {
   Table,
   UpdatedAt
 } from 'sequelize-typescript'
-import { buildRemoteVideoBaseUrl } from '@server/helpers/activitypub'
 import { afterCommitIfTransaction } from '@server/helpers/database-utils'
 import { MThumbnail, MThumbnailVideo, MVideoWithHost } from '@server/types/models'
 import { ThumbnailType } from '../../../shared/models/videos/thumbnail.type'
@@ -168,10 +167,8 @@ export class ThumbnailModel extends Model {
     const staticPath = ThumbnailModel.types[this.type].staticPath + this.filename
 
     if (video.isOwned()) return WEBSERVER.URL + staticPath
-    if (this.fileUrl) return this.fileUrl
 
-    // Fallback if we don't have a file URL
-    return buildRemoteVideoBaseUrl(video, staticPath)
+    return this.fileUrl
   }
 
   getPath () {
diff --git a/server/models/video/video-caption.ts b/server/models/video/video-caption.ts
index 71b067335..0bbe9b752 100644
--- a/server/models/video/video-caption.ts
+++ b/server/models/video/video-caption.ts
@@ -16,7 +16,6 @@ import {
   UpdatedAt
 } from 'sequelize-typescript'
 import { v4 as uuidv4 } from 'uuid'
-import { buildRemoteVideoBaseUrl } from '@server/helpers/activitypub'
 import { MVideoCaption, MVideoCaptionFormattable, MVideoCaptionVideo, MVideoWithHost } from '@server/types/models'
 import { VideoCaption } from '../../../shared/models/videos/caption/video-caption.model'
 import { isVideoCaptionLanguageValid } from '../../helpers/custom-validators/video-captions'
@@ -208,9 +207,7 @@ export class VideoCaptionModel extends Model {
     if (!this.Video) this.Video = video as VideoModel
 
     if (video.isOwned()) return WEBSERVER.URL + this.getCaptionStaticPath()
-    if (this.fileUrl) return this.fileUrl
 
-    // Fallback if we don't have a file URL
-    return buildRemoteVideoBaseUrl(video, this.getCaptionStaticPath())
+    return this.fileUrl
   }
 }
diff --git a/server/models/video/video-file.ts b/server/models/video/video-file.ts
index 57807cbfd..5a3706259 100644
--- a/server/models/video/video-file.ts
+++ b/server/models/video/video-file.ts
@@ -427,10 +427,8 @@ export class VideoFileModel extends Model {
     if (!this.Video) this.Video = video as VideoModel
 
     if (video.isOwned()) return WEBSERVER.URL + this.getFileStaticPath(video)
-    if (this.fileUrl) return this.fileUrl
 
-    // Fallback if we don't have a file URL
-    return buildRemoteVideoBaseUrl(video, this.getFileStaticPath(video))
+    return this.fileUrl
   }
 
   getFileStaticPath (video: MVideo) {
@@ -454,10 +452,7 @@ export class VideoFileModel extends Model {
   getRemoteTorrentUrl (video: MVideoWithHost) {
     if (video.isOwned()) throw new Error(`Video ${video.url} is not a remote video`)
 
-    if (this.torrentUrl) return this.torrentUrl
-
-    // Fallback if we don't have a torrent URL
-    return buildRemoteVideoBaseUrl(video, this.getTorrentStaticPath())
+    return this.torrentUrl
   }
 
   // We proxify torrent requests so use a local URL
diff --git a/server/models/video/video-format-utils.ts b/server/models/video/video-format-utils.ts
index adf460734..9dc3e7722 100644
--- a/server/models/video/video-format-utils.ts
+++ b/server/models/video/video-format-utils.ts
@@ -14,8 +14,6 @@ import {
 } from '../../lib/activitypub/url'
 import {
   MStreamingPlaylistRedundanciesOpt,
-  MStreamingPlaylistVideo,
-  MVideo,
   MVideoAP,
   MVideoFile,
   MVideoFormattable,
@@ -127,8 +125,6 @@ function videoModelToFormattedDetailsJSON (video: MVideoFormattableDetails): Vid
     }
   })
 
-  const { baseUrlHttp, baseUrlWs } = video.getBaseUrls()
-
   const tags = video.Tags ? video.Tags.map(t => t.name) : []
 
   const streamingPlaylists = streamingPlaylistsModelToFormattedJSON(video, video.VideoStreamingPlaylists)
@@ -147,14 +143,14 @@ function videoModelToFormattedDetailsJSON (video: MVideoFormattableDetails): Vid
       label: VideoModel.getStateLabel(video.state)
     },
 
-    trackerUrls: video.getTrackerUrls(baseUrlHttp, baseUrlWs),
+    trackerUrls: video.getTrackerUrls(),
 
     files: [],
     streamingPlaylists
   }
 
   // Format and sort video files
-  detailsJson.files = videoFilesModelToFormattedJSON(video, video, baseUrlHttp, baseUrlWs, video.VideoFiles)
+  detailsJson.files = videoFilesModelToFormattedJSON(video, video.VideoFiles)
 
   return Object.assign(formattedJson, detailsJson)
 }
@@ -165,17 +161,13 @@ function streamingPlaylistsModelToFormattedJSON (
 ): VideoStreamingPlaylist[] {
   if (isArray(playlists) === false) return []
 
-  const { baseUrlHttp, baseUrlWs } = video.getBaseUrls()
-
   return playlists
     .map(playlist => {
-      const playlistWithVideo = Object.assign(playlist, { Video: video })
-
       const redundancies = isArray(playlist.RedundancyVideos)
         ? playlist.RedundancyVideos.map(r => ({ baseUrl: r.fileUrl }))
         : []
 
-      const files = videoFilesModelToFormattedJSON(playlistWithVideo, video, baseUrlHttp, baseUrlWs, playlist.VideoFiles)
+      const files = videoFilesModelToFormattedJSON(video, playlist.VideoFiles)
 
       return {
         id: playlist.id,
@@ -194,14 +186,12 @@ function sortByResolutionDesc (fileA: MVideoFile, fileB: MVideoFile) {
   return -1
 }
 
-// FIXME: refactor/merge model and video arguments
 function videoFilesModelToFormattedJSON (
-  model: MVideo | MStreamingPlaylistVideo,
   video: MVideoFormattableDetails,
-  baseUrlHttp: string,
-  baseUrlWs: string,
   videoFiles: MVideoFileRedundanciesOpt[]
 ): VideoFile[] {
+  const trackerUrls = video.getTrackerUrls()
+
   return [ ...videoFiles ]
     .filter(f => !f.isLive())
     .sort(sortByResolutionDesc)
@@ -213,7 +203,7 @@ function videoFilesModelToFormattedJSON (
         },
 
         // FIXME: deprecated in 3.2
-        magnetUri: generateMagnetUri(model, video, videoFile, baseUrlHttp, baseUrlWs),
+        magnetUri: generateMagnetUri(video, videoFile, trackerUrls),
 
         size: videoFile.size,
         fps: videoFile.fps,
@@ -229,15 +219,13 @@ function videoFilesModelToFormattedJSON (
     })
 }
 
-// FIXME: refactor/merge model and video arguments
 function addVideoFilesInAPAcc (
   acc: ActivityUrlObject[] | ActivityTagObject[],
-  model: MVideoAP | MStreamingPlaylistVideo,
   video: MVideoWithHost,
-  baseUrlHttp: string,
-  baseUrlWs: string,
   files: MVideoFile[]
 ) {
+  const trackerUrls = video.getTrackerUrls()
+
   const sortedFiles = [ ...files ]
     .filter(f => !f.isLive())
     .sort(sortByResolutionDesc)
@@ -271,14 +259,13 @@ function addVideoFilesInAPAcc (
     acc.push({
       type: 'Link',
       mediaType: 'application/x-bittorrent;x-scheme-handler/magnet' as 'application/x-bittorrent;x-scheme-handler/magnet',
-      href: generateMagnetUri(model, video, file, baseUrlHttp, baseUrlWs),
+      href: generateMagnetUri(video, file, trackerUrls),
       height: file.resolution
     })
   }
 }
 
 function videoModelToActivityPubObject (video: MVideoAP): VideoObject {
-  const { baseUrlHttp, baseUrlWs } = video.getBaseUrls()
   if (!video.Tags) video.Tags = []
 
   const tag = video.Tags.map(t => ({
@@ -319,7 +306,7 @@ function videoModelToActivityPubObject (video: MVideoAP): VideoObject {
     }
   ]
 
-  addVideoFilesInAPAcc(url, video, video, baseUrlHttp, baseUrlWs, video.VideoFiles || [])
+  addVideoFilesInAPAcc(url, video, video.VideoFiles || [])
 
   for (const playlist of (video.VideoStreamingPlaylists || [])) {
     const tag = playlist.p2pMediaLoaderInfohashes
@@ -331,8 +318,7 @@ function videoModelToActivityPubObject (video: MVideoAP): VideoObject {
       href: playlist.segmentsSha256Url
     })
 
-    const playlistWithVideo = Object.assign(playlist, { Video: video })
-    addVideoFilesInAPAcc(tag, playlistWithVideo, video, baseUrlHttp, baseUrlWs, playlist.VideoFiles || [])
+    addVideoFilesInAPAcc(tag, video, playlist.VideoFiles || [])
 
     url.push({
       type: 'Link',
@@ -342,6 +328,19 @@ function videoModelToActivityPubObject (video: MVideoAP): VideoObject {
     })
   }
 
+  for (const trackerUrl of video.getTrackerUrls()) {
+    const rel2 = trackerUrl.startsWith('http')
+      ? 'http'
+      : 'websocket'
+
+    url.push({
+      type: 'Link',
+      name: `tracker-${rel2}`,
+      rel: [ 'tracker', rel2 ],
+      href: trackerUrl
+    })
+  }
+
   const subtitleLanguage = []
   for (const caption of video.VideoCaptions) {
     subtitleLanguage.push({
diff --git a/server/models/video/video.ts b/server/models/video/video.ts
index 2e6b6aeec..9e67ca0f4 100644
--- a/server/models/video/video.ts
+++ b/server/models/video/video.ts
@@ -60,7 +60,6 @@ import {
   API_VERSION,
   CONSTRAINTS_FIELDS,
   LAZY_STATIC_PATHS,
-  REMOTE_SCHEME,
   STATIC_PATHS,
   VIDEO_CATEGORIES,
   VIDEO_LANGUAGES,
@@ -107,6 +106,8 @@ import { ActorModel } from '../activitypub/actor'
 import { AvatarModel } from '../avatar/avatar'
 import { VideoRedundancyModel } from '../redundancy/video-redundancy'
 import { ServerModel } from '../server/server'
+import { TrackerModel } from '../server/tracker'
+import { VideoTrackerModel } from '../server/video-tracker'
 import { buildTrigramSearchIndex, buildWhereIdOrUUID, getVideoSort, isOutdated, throwIfNotValid } from '../utils'
 import { ScheduleVideoUpdateModel } from './schedule-video-update'
 import { TagModel } from './tag'
@@ -137,6 +138,7 @@ export enum ScopeNames {
   FOR_API = 'FOR_API',
   WITH_ACCOUNT_DETAILS = 'WITH_ACCOUNT_DETAILS',
   WITH_TAGS = 'WITH_TAGS',
+  WITH_TRACKERS = 'WITH_TRACKERS',
   WITH_WEBTORRENT_FILES = 'WITH_WEBTORRENT_FILES',
   WITH_SCHEDULED_UPDATE = 'WITH_SCHEDULED_UPDATE',
   WITH_BLACKLISTED = 'WITH_BLACKLISTED',
@@ -320,6 +322,14 @@ export type AvailableForListIDsOptions = {
   [ScopeNames.WITH_TAGS]: {
     include: [ TagModel ]
   },
+  [ScopeNames.WITH_TRACKERS]: {
+    include: [
+      {
+        attributes: [ 'id', 'url' ],
+        model: TrackerModel
+      }
+    ]
+  },
   [ScopeNames.WITH_BLACKLISTED]: {
     include: [
       {
@@ -616,6 +626,13 @@ export class VideoModel extends Model {
   })
   Tags: TagModel[]
 
+  @BelongsToMany(() => TrackerModel, {
+    foreignKey: 'videoId',
+    through: () => VideoTrackerModel,
+    onDelete: 'CASCADE'
+  })
+  Trackers: TrackerModel[]
+
   @HasMany(() => ThumbnailModel, {
     foreignKey: {
       name: 'videoId',
@@ -1436,6 +1453,7 @@ export class VideoModel extends Model {
       ScopeNames.WITH_SCHEDULED_UPDATE,
       ScopeNames.WITH_THUMBNAILS,
       ScopeNames.WITH_LIVE,
+      ScopeNames.WITH_TRACKERS,
       { method: [ ScopeNames.WITH_WEBTORRENT_FILES, true ] },
       { method: [ ScopeNames.WITH_STREAMING_PLAYLISTS, true ] }
     ]
@@ -1887,18 +1905,15 @@ export class VideoModel extends Model {
   }
 
   getFormattedVideoFilesJSON (): VideoFile[] {
-    const { baseUrlHttp, baseUrlWs } = this.getBaseUrls()
     let files: VideoFile[] = []
 
     if (Array.isArray(this.VideoFiles)) {
-      const result = videoFilesModelToFormattedJSON(this, this, baseUrlHttp, baseUrlWs, this.VideoFiles)
+      const result = videoFilesModelToFormattedJSON(this, this.VideoFiles)
       files = files.concat(result)
     }
 
     for (const p of (this.VideoStreamingPlaylists || [])) {
-      p.Video = this
-
-      const result = videoFilesModelToFormattedJSON(p, this, baseUrlHttp, baseUrlWs, p.VideoFiles)
+      const result = videoFilesModelToFormattedJSON(this, p.VideoFiles)
       files = files.concat(result)
     }
 
@@ -2030,25 +2045,18 @@ export class VideoModel extends Model {
     return false
   }
 
-  getBaseUrls () {
-    if (this.isOwned()) {
-      return {
-        baseUrlHttp: WEBSERVER.URL,
-        baseUrlWs: WEBSERVER.WS + '://' + WEBSERVER.HOSTNAME + ':' + WEBSERVER.PORT
-      }
-    }
-
-    return {
-      baseUrlHttp: REMOTE_SCHEME.HTTP + '://' + this.VideoChannel.Account.Actor.Server.host,
-      baseUrlWs: REMOTE_SCHEME.WS + '://' + this.VideoChannel.Account.Actor.Server.host
-    }
+  getBandwidthBits (videoFile: MVideoFile) {
+    return Math.ceil((videoFile.size * 8) / this.duration)
   }
 
-  getTrackerUrls (baseUrlHttp: string, baseUrlWs: string) {
-    return [ baseUrlWs + '/tracker/socket', baseUrlHttp + '/tracker/announce' ]
-  }
+  getTrackerUrls () {
+    if (this.isOwned()) {
+      return [
+        WEBSERVER.URL + '/tracker/announce',
+        WEBSERVER.WS + '://' + WEBSERVER.HOSTNAME + ':' + WEBSERVER.PORT + '/tracker/socket'
+      ]
+    }
 
-  getBandwidthBits (videoFile: MVideoFile) {
-    return Math.ceil((videoFile.size * 8) / this.duration)
+    return this.Trackers.map(t => t.url)
   }
 }
diff --git a/server/types/models/server/tracker.ts b/server/types/models/server/tracker.ts
new file mode 100644
index 000000000..5fe03f8c0
--- /dev/null
+++ b/server/types/models/server/tracker.ts
@@ -0,0 +1,7 @@
+import { TrackerModel } from '../../../models/server/tracker'
+
+export type MTracker = Omit<TrackerModel, 'Videos'>
+
+// ############################################################################
+
+export type MTrackerUrl = Pick<MTracker, 'url'>
diff --git a/server/types/models/video/video.ts b/server/types/models/video/video.ts
index 92dcbaf59..692490230 100644
--- a/server/types/models/video/video.ts
+++ b/server/types/models/video/video.ts
@@ -1,5 +1,6 @@
 import { PickWith, PickWithOpt } from '@shared/core-utils'
 import { VideoModel } from '../../../models/video/video'
+import { MTrackerUrl } from '../server/tracker'
 import { MUserVideoHistoryTime } from '../user/user-video-history'
 import { MScheduleVideoUpdate } from './schedule-video-update'
 import { MTag } from './tag'
@@ -216,4 +217,5 @@ export type MVideoFormattableDetails =
   Use<'VideoChannel', MChannelFormattable> &
   Use<'Tags', MTag[]> &
   Use<'VideoStreamingPlaylists', MStreamingPlaylistRedundanciesOpt[]> &
-  Use<'VideoFiles', MVideoFileRedundanciesOpt[]>
+  Use<'VideoFiles', MVideoFileRedundanciesOpt[]> &
+  Use<'Trackers', MTrackerUrl[]>
diff --git a/shared/models/activitypub/objects/common-objects.ts b/shared/models/activitypub/objects/common-objects.ts
index 43e8ea067..76f0e3bcf 100644
--- a/shared/models/activitypub/objects/common-objects.ts
+++ b/shared/models/activitypub/objects/common-objects.ts
@@ -30,7 +30,7 @@ export type ActivityPlaylistSegmentHashesObject = {
   href: string
 }
 
-export type ActivityVideoFileMetadataObject = {
+export type ActivityVideoFileMetadataUrlObject = {
   type: 'Link'
   rel: [ 'metadata', any ]
   mediaType: 'application/json'
@@ -39,6 +39,13 @@ export type ActivityVideoFileMetadataObject = {
   fps: number
 }
 
+export type ActivityTrackerUrlObject = {
+  type: 'Link'
+  rel: [ 'tracker', 'websocket' | 'http' ]
+  name: string
+  href: string
+}
+
 export type ActivityPlaylistInfohashesObject = {
   type: 'Infohash'
   name: string
@@ -96,7 +103,7 @@ export type ActivityTagObject =
   | ActivityMentionObject
   | ActivityBitTorrentUrlObject
   | ActivityMagnetUrlObject
-  | ActivityVideoFileMetadataObject
+  | ActivityVideoFileMetadataUrlObject
 
 export type ActivityUrlObject =
   ActivityVideoUrlObject
@@ -104,7 +111,8 @@ export type ActivityUrlObject =
   | ActivityBitTorrentUrlObject
   | ActivityMagnetUrlObject
   | ActivityHtmlUrlObject
-  | ActivityVideoFileMetadataObject
+  | ActivityVideoFileMetadataUrlObject
+  | ActivityTrackerUrlObject
 
 export interface ActivityPubAttributedTo {
   type: 'Group' | 'Person'
diff --git a/shared/models/activitypub/objects/video-torrent-object.ts b/shared/models/activitypub/objects/video-torrent-object.ts
index 6d18e93d5..bfbcfb1a5 100644
--- a/shared/models/activitypub/objects/video-torrent-object.ts
+++ b/shared/models/activitypub/objects/video-torrent-object.ts
@@ -40,11 +40,14 @@ export interface VideoObject {
   icon: ActivityIconObject[]
 
   url: ActivityUrlObject[]
+
   likes: string
   dislikes: string
   shares: string
   comments: string
+
   attributedTo: ActivityPubAttributedTo[]
+
   to?: string[]
   cc?: string[]
 }