From 129dc46b9ea53b4308125564d7818919b05def25 Mon Sep 17 00:00:00 2001
From: Haxy <clienthax@gmail.com>
Date: Mon, 6 May 2024 14:41:23 +0100
Subject: [PATCH] Parse YT-EXT-AUDIO-CONTENT-ID for multiple language detection
 in YouTube HLS Manifests.

---
 yt_dlp/extractor/common.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/yt_dlp/extractor/common.py b/yt_dlp/extractor/common.py
index bebbc6b43..9628a876c 100644
--- a/yt_dlp/extractor/common.py
+++ b/yt_dlp/extractor/common.py
@@ -2211,6 +2211,12 @@ class InfoExtractor:
                         'quality': quality,
                         'has_drm': has_drm,
                     }
+
+                    # YouTube Specific
+                    if last_stream_inf.get('YT-EXT-AUDIO-CONTENT-ID'):
+                        # Strip anything after and including from the end '.'
+                        f['language'] = last_stream_inf.get('YT-EXT-AUDIO-CONTENT-ID').split('.')[0]
+
                     resolution = last_stream_inf.get('RESOLUTION')
                     if resolution:
                         mobj = re.search(r'(?P<width>\d+)[xX](?P<height>\d+)', resolution)