stricter youtubedl format selectors (#3516)

* stricter youtubedl format selectors

make sure selectors avoid av1, and otherwise match as closely to the
maximum resolution enabled for transcoding

* add support for merge formats in youtubedl

* avoid vp9.2 in youtubedl to avoid any HDR

* move getEnabledResolutions, safer replace of imported extension

* add test for youtube-dl selectors

1 files changed, 12 insertions, 1 deletions

diff --git a/server/lib/video-transcoding.ts b/server/lib/video-transcoding.ts
index 078e85acf..a6b79eaea 100644
--- a/server/lib/video-transcoding.ts
+++ b/server/lib/video-transcoding.ts
@@ -201,6 +201,16 @@ function generateHlsPlaylist (options: {
   })
 }
 
+function getEnabledResolutions (type: 'vod' | 'live') {
+  const transcoding = type === 'vod'
+    ? CONFIG.TRANSCODING
+    : CONFIG.LIVE.TRANSCODING
+
+  return Object.keys(transcoding.RESOLUTIONS)
+               .filter(key => transcoding.ENABLED && transcoding.RESOLUTIONS[key] === true)
+               .map(r => parseInt(r, 10))
+}
+
 // ---------------------------------------------------------------------------
 
 export {
@@ -208,7 +218,8 @@ export {
   generateHlsPlaylistFromTS,
   optimizeOriginalVideofile,
   transcodeNewResolution,
-  mergeAudioVideofile
+  mergeAudioVideofile,
+  getEnabledResolutions
 }
 
 // ---------------------------------------------------------------------------