From aeda19df0b7431f5823ca8b88960ec3b0bf4cbc7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Wojciech=20Tyczy=C5=84ski?= <wojciech.tyczynski@sky.uk>
Date: Tue, 15 Aug 2023 17:49:04 +0200
Subject: [PATCH] fix: Default language to 'und' for native tracks (#5464)

Set default language to `und` for native audio/text tracks if missing.
---
 lib/util/stream_utils.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/util/stream_utils.js b/lib/util/stream_utils.js
index bbbfd35ddf..af1ae26f77 100644
--- a/lib/util/stream_utils.js
+++ b/lib/util/stream_utils.js
@@ -1325,13 +1325,15 @@ shaka.util.StreamUtils = class {
    * @private
    */
   static html5TrackToGenericShakaTrack_(html5Track) {
+    const language = html5Track.language;
+
     /** @type {shaka.extern.Track} */
     const track = {
       id: shaka.util.StreamUtils.html5TrackId(html5Track),
       active: false,
       type: '',
       bandwidth: 0,
-      language: shaka.util.LanguageUtils.normalize(html5Track.language),
+      language: shaka.util.LanguageUtils.normalize(language || 'und'),
       label: html5Track.label,
       kind: html5Track.kind,
       width: null,
@@ -1361,6 +1363,7 @@ shaka.util.StreamUtils = class {
       originalAudioId: null,
       originalTextId: null,
       originalImageId: null,
+      originalLanguage: language,
     };
 
     return track;