From 5cc1fbdd6cdcbbe84da38a55ade748262ab96d7d Mon Sep 17 00:00:00 2001
From: girst <tobi@isticktoit.net>
Date: Tue, 21 Jul 2020 11:21:53 +0200
Subject: [PATCH] move main (non-translation) subtitles to the first slot

---
 app/common/common.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/app/common/common.py b/app/common/common.py
index 90b094b..90541a9 100644
--- a/app/common/common.py
+++ b/app/common/common.py
@@ -261,6 +261,13 @@ def prepare_metadata(metadata):
             .get('captionTracks',[])
     ], key=lambda cc: cc['autogenerated'])
 
+    try: # any level might not exist
+        # find the native language captions (assuming there is only 1 audioTrack):
+        main_subtitle = metadata['captions']['playerCaptionsTracklistRenderer']['audioTracks'][0]['defaultCaptionTrackIndex']
+        # and move it to the first place:
+        subtitles.insert(0, subtitles.pop(main_subtitle))
+    except: pass
+
     def clean_url(url):
         # externals URLs are redirected through youtube.com/redirect, but we
         # may encounter internal URLs, too
-- 
2.39.3