if there is more than one subtitle for the language, use the first one

diff --git a/youtube_dl/extractor/youtube.py b/youtube_dl/extractor/youtube.py
index a346f4c960df87b4f35bda4f8e571c6405f1a316..73a01107d722437ebb62d1a82ec72a33e49124cf 100644 (file)
--- a/youtube_dl/extractor/youtube.py
+++ b/youtube_dl/extractor/youtube.py
@@ -493,6 +493,8 @@ class YoutubeIE(YoutubeBaseInfoExtractor, SubtitlesInfoExtractor):
         sub_lang_list = {}
         for l in lang_list:
             lang = l[1]
+            if lang in sub_lang_list:
+                continue
             params = compat_urllib_parse.urlencode({
                 'lang': lang,
                 'v': video_id,