1 files changed, 103 insertions, 0 deletions
diff --git a/youtube_dl/extractor/howstuffworks.py b/youtube_dl/extractor/howstuffworks.py
new file mode 100644
index 000000000..e97339121
--- /dev/null
+++ b/youtube_dl/extractor/howstuffworks.py
@@ -0,0 +1,103 @@
+from __future__ import unicode_literals
+
+from .common import InfoExtractor
+from ..utils import (
+    find_xpath_attr,
+    int_or_none,
+    js_to_json,
+    unescapeHTML,
+)
+
+
+class HowStuffWorksIE(InfoExtractor):
+    _VALID_URL = r'https?://[\da-z-]+\.howstuffworks\.com/(?:[^/]+/)*\d+-(?P<id>.+?)-video\.htm'
+    _TESTS = [
+        {
+            'url': 'http://adventure.howstuffworks.com/5266-cool-jobs-iditarod-musher-video.htm',
+            'info_dict': {
+                'id': '450221',
+                'ext': 'flv',
+                'title': 'Cool Jobs - Iditarod Musher',
+                'description': 'Cold sleds, freezing temps and warm dog breath... an Iditarod musher\'s dream. Kasey-Dee Gardner jumps on a sled to find out what the big deal is.',
+                'display_id': 'cool-jobs-iditarod-musher',
+                'thumbnail': 're:^https?://.*\.jpg$',
+                'duration': 161,
+            },
+        },
+        {
+            'url': 'http://adventure.howstuffworks.com/7199-survival-zone-food-and-water-in-the-savanna-video.htm',
+            'info_dict': {
+                'id': '453464',
+                'ext': 'mp4',
+                'title': 'Survival Zone: Food and Water In the Savanna',
+                'description': 'Learn how to find both food and water while trekking in the African savannah. In this video from the Discovery Channel.',
+                'display_id': 'survival-zone-food-and-water-in-the-savanna',
+                'thumbnail': 're:^https?://.*\.jpg$',
+            },
+        },
+        {
+            'url': 'http://entertainment.howstuffworks.com/arts/2706-sword-swallowing-1-by-dan-meyer-video.htm',
+            'info_dict': {
+                'id': '440011',
+                'ext': 'flv',
+                'title': 'Sword Swallowing #1 by Dan Meyer',
+                'description': 'Video footage (1 of 3) used by permission of the owner Dan Meyer through Sword Swallowers Association International <www.swordswallow.org>',
+                'display_id': 'sword-swallowing-1-by-dan-meyer',
+                'thumbnail': 're:^https?://.*\.jpg$',
+            },
+        },
+    ]
+
+    def _real_extract(self, url):
+        display_id = self._match_id(url)
+        webpage = self._download_webpage(url, display_id)
+        clip_js = self._search_regex(
+            r'(?s)var clip = ({.*?});', webpage, 'clip info')
+        clip_info = self._parse_json(
+            clip_js, display_id, transform_source=js_to_json)
+
+        video_id = clip_info['content_id']
+        formats = []
+        m3u8_url = clip_info.get('m3u8')
+        if m3u8_url:
+            formats += self._extract_m3u8_formats(m3u8_url, video_id, 'mp4')
+        for video in clip_info.get('mp4', []):
+            formats.append({
+                'url': video['src'],
+                'format_id': video['bitrate'],
+                'vbr': int(video['bitrate'].rstrip('k')),
+            })
+
+        if not formats:
+            smil = self._download_xml(
+                'http://services.media.howstuffworks.com/videos/%s/smil-service.smil' % video_id,
+                video_id, 'Downloading video SMIL')
+
+            http_base = find_xpath_attr(
+                smil,
+                './{0}head/{0}meta'.format('{http://www.w3.org/2001/SMIL20/Language}'),
+                'name',
+                'httpBase').get('content')
+
+            URL_SUFFIX = '?v=2.11.3&fp=LNX 11,2,202,356&r=A&g=A'
+
+            for video in smil.findall(
+                    './{0}body/{0}switch/{0}video'.format('{http://www.w3.org/2001/SMIL20/Language}')):
+                vbr = int_or_none(video.attrib['system-bitrate'], scale=1000)
+                formats.append({
+                    'url': '%s/%s%s' % (http_base, video.attrib['src'], URL_SUFFIX),
+                    'format_id': '%dk' % vbr,
+                    'vbr': vbr,
+                })
+
+        self._sort_formats(formats)
+
+        return {
+            'id': '%s' % video_id,
+            'display_id': display_id,
+            'title': unescapeHTML(clip_info['clip_title']),
+            'description': unescapeHTML(clip_info.get('caption')),
+            'thumbnail': clip_info.get('video_still_url'),
+            'duration': clip_info.get('duration'),
+            'formats': formats,
+        }