[nrk] Improve subtitle support (#3092)

youtube_dl/extractor/nrk.py

@@ -7,8 +7,10 @@ from .common import InfoExtractor
 from ..utils import (
     ExtractorError,
     float_or_none,
+    parse_duration,
     unified_strdate,
 )
+from .subtitles import SubtitlesInfoExtractor
 
 
 class NRKIE(InfoExtractor):
@@ -71,8 +73,8 @@ class NRKIE(InfoExtractor):
         }
 
 
-class NRKTVIE(InfoExtractor):
+class NRKTVIE(SubtitlesInfoExtractor):
-    _VALID_URL = r'http://tv\.nrk(?:super)?\.no/(?:serie/[^/]+|program)/(?P<id>[a-zA-Z]{4}\d{8})(?:/\d{2}-\d{2}-\d{4})?(?:#del=(?P<part_id>\d+))?'
+    _VALID_URL = r'(?P<baseurl>http://tv\.nrk(?:super)?\.no/)(?:serie/[^/]+|program)/(?P<id>[a-zA-Z]{4}\d{8})(?:/\d{2}-\d{2}-\d{4})?(?:#del=(?P<part_id>\d+))?'
 
     _TESTS = [
         {
@@ -147,6 +149,29 @@ class NRKTVIE(InfoExtractor):
         }
     ]
 
+    def _seconds2str(self, s):
+        return '%02d:%02d:%02d.%03d' % (s / 3600, (s % 3600) / 60, s % 60, (s % 1) * 1000)
+
+    def _debug_print(self, txt):
+        if self._downloader.params.get('verbose', False):
+            self.to_screen('[debug] %s' % txt)
+
+    def _extract_captions(self, subtitlesurl, video_id, baseurl):
+        url = "%s%s" % (baseurl, subtitlesurl)
+        self._debug_print('%s: Subtitle url: %s' % (video_id, url))
+        captions = self._download_xml(url, video_id, 'Downloading subtitles')
+        lang = captions.get('lang', 'no')
+        ps = captions.findall('./{0}body/{0}div/{0}p'.format('{http://www.w3.org/ns/ttml}'))
+        srt = ''
+        for pos, p in enumerate(ps):
+            begin = parse_duration(p.get('begin'))
+            duration = parse_duration(p.get('dur'))
+            starttime = self._seconds2str(begin)
+            endtime = self._seconds2str(begin + duration)
+            text = '\n'.join(p.itertext())
+            srt += '%s\r\n%s --> %s\r\n%s\r\n\r\n' % (str(pos), starttime, endtime, text)
+        return {lang: srt}
+
     def _extract_f4m(self, manifest_url, video_id):
         return self._extract_f4m_formats(manifest_url + '?hdcore=3.1.1&plugin=aasp-3.1.1.69.124', video_id)
 
@@ -154,6 +179,7 @@ class NRKTVIE(InfoExtractor):
         mobj = re.match(self._VALID_URL, url)
         video_id = mobj.group('id')
         part_id = mobj.group('part_id')
+        baseurl = mobj.group('baseurl')
 
         webpage = self._download_webpage(url, video_id)
 
@@ -210,9 +236,18 @@ class NRKTVIE(InfoExtractor):
         m3u8_url = re.search(r'data-hls-media="([^"]+)"', webpage)
         if m3u8_url:
             formats.extend(self._extract_m3u8_formats(m3u8_url.group(1), video_id, 'mp4'))
-
         self._sort_formats(formats)
 
+        subtitles_url = self._html_search_regex(
+            r'data-subtitlesurl[ ]*=[ ]*"([^"]+)"',
+            webpage, 'subtitle URL', default=None)
+        subtitles = None
+        if subtitles_url:
+            subtitles = self._extract_captions(subtitles_url, video_id, baseurl)
+        if self._downloader.params.get('listsubtitles', False):
+            self._list_available_subtitles(video_id, subtitles)
+            return
+
         return {
             'id': video_id,
             'title': title,
@@ -221,4 +256,5 @@ class NRKTVIE(InfoExtractor):
             'upload_date': upload_date,
             'duration': duration,
             'formats': formats,
+            'subtitles': subtitles,
         }