diff --git a/server/controllers/tracker.ts b/server/controllers/tracker.ts
index c962fada5..d09b19cae 100644
--- a/server/controllers/tracker.ts
+++ b/server/controllers/tracker.ts
@@ -51,7 +51,7 @@ const trackerServer = new TrackerServer({
       const videoFileExists = await VideoFileModel.doesInfohashExistCached(infoHash)
       if (videoFileExists === true) return cb()
 
-      const playlistExists = await VideoStreamingPlaylistModel.doesInfohashExist(infoHash)
+      const playlistExists = await VideoStreamingPlaylistModel.doesInfohashExistCached(infoHash)
       if (playlistExists === true) return cb()
 
       cb(new Error(`Unknown infoHash ${infoHash} requested by ip ${ip}`))
diff --git a/server/helpers/ffmpeg-utils.ts b/server/helpers/ffmpeg-utils.ts
index b063cedcb..b985988d3 100644
--- a/server/helpers/ffmpeg-utils.ts
+++ b/server/helpers/ffmpeg-utils.ts
@@ -8,7 +8,6 @@ import { CONFIG } from '../initializers/config'
 import { FFMPEG_NICE, VIDEO_LIVE, VIDEO_TRANSCODING_FPS } from '../initializers/constants'
 import { processImage } from './image-utils'
 import { logger } from './logger'
-import { concat } from 'lodash'
 
 /**
  * A toolbox to play with audio