[nationalgeographic] Add extractor (closes #4960)

youtube_dl/extractor/__init__.py

@@ -285,6 +285,7 @@
 from .myspass import MySpassIE
 from .myvideo import MyVideoIE
 from .myvidster import MyVidsterIE
+from .nationalgeographic import NationalGeographicIE
 from .naver import NaverIE
 from .nba import NBAIE
 from .nbc import (

youtube_dl/extractor/nationalgeographic.py

@@ -0,0 +1,38 @@
+from __future__ import unicode_literals
+
+from .common import InfoExtractor
+from ..utils import (
+    smuggle_url,
+    url_basename,
+)
+
+
+class NationalGeographicIE(InfoExtractor):
+    _VALID_URL = r'http://video\.nationalgeographic\.com/video/.*?'
+
+    _TEST = {
+        'url': 'http://video.nationalgeographic.com/video/news/150210-news-crab-mating-vin?source=featuredvideo',
+        'info_dict': {
+            'id': '4DmDACA6Qtk_',
+            'ext': 'flv',
+            'title': 'Mating Crabs Busted by Sharks',
+            'description': 'md5:16f25aeffdeba55aaa8ec37e093ad8b3',
+        },
+        'add_ie': ['ThePlatform'],
+    }
+
+    def _real_extract(self, url):
+        name = url_basename(url)
+
+        webpage = self._download_webpage(url, name)
+        feed_url = self._search_regex(r'data-feed-url="([^"]+)"', webpage, 'feed url')
+        guid = self._search_regex(r'data-video-guid="([^"]+)"', webpage, 'guid')
+
+        feed = self._download_xml('%s?byGuid=%s' % (feed_url, guid), name)
+        content = feed.find('.//{http://search.yahoo.com/mrss/}content')
+        theplatform_id = url_basename(content.attrib.get('url'))
+
+        return self.url_result(smuggle_url(
+            'http://link.theplatform.com/s/ngs/%s?format=SMIL&formats=MPEG4&manifest=f4m' % theplatform_id,
+            # For some reason, the normal links don't work and we must force the use of f4m
+            {'force_smil_url': True}))

youtube_dl/extractor/theplatform.py

@@ -71,7 +71,9 @@ def _real_extract(self, url):
         if not provider_id:
             provider_id = 'dJ5BDC'
 
-        if mobj.group('config'):
+        if smuggled_data.get('force_smil_url', False):
+            smil_url = url
+        elif mobj.group('config'):
             config_url = url + '&form=json'
             config_url = config_url.replace('swf/', 'config/')
             config_url = config_url.replace('onsite/', 'onsite/config/')