[francetv] Extract subtitles from the HLS manifest

yt_dlp/extractor/francetv.py

@@ -151,6 +151,7 @@ class FranceTVIE(InfoExtractor):
                     videos.append(fallback_info['video'])
 
         formats = []
+        subtitles = {}
         for video in videos:
             video_url = video.get('url')
             if not video_url:
@@ -171,10 +172,12 @@ class FranceTVIE(InfoExtractor):
                     sign(video_url, format_id) + '&hdcore=3.7.0&plugin=aasp-3.7.0.39.44',
                     video_id, f4m_id=format_id, fatal=False))
             elif ext == 'm3u8':
-                formats.extend(self._extract_m3u8_formats(
+                m3u8_fmts, m3u8_subs = self._extract_m3u8_formats_and_subtitles(
                     sign(video_url, format_id), video_id, 'mp4',
                     entry_protocol='m3u8_native', m3u8_id=format_id,
-                    fatal=False))
+                    fatal=False)
+                formats.extend(m3u8_fmts)
+                subtitles = self._merge_subtitles(subtitles, m3u8_subs)
             elif ext == 'mpd':
                 formats.extend(self._extract_mpd_formats(
                     sign(video_url, format_id), video_id, mpd_id=format_id, fatal=False))
@@ -199,13 +202,12 @@ class FranceTVIE(InfoExtractor):
             title += ' - %s' % subtitle
         title = title.strip()
 
-        subtitles = {}
-        subtitles_list = [{
-            'url': subformat['url'],
-            'ext': subformat.get('format'),
-        } for subformat in info.get('subtitles', []) if subformat.get('url')]
-        if subtitles_list:
-            subtitles['fr'] = subtitles_list
+        subtitles.setdefault('fr', []).extend(
+            [{
+                'url': subformat['url'],
+                'ext': subformat.get('format'),
+            } for subformat in info.get('subtitles', []) if subformat.get('url')]
+        )
 
         return {
             'id': video_id,