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[livestream] Parse SMIL (#2713)
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@ -5,11 +5,14 @@
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from .common import InfoExtractor
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from ..utils import (
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compat_str,
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compat_urllib_parse_urlparse,
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compat_urlparse,
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xpath_with_ns,
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compat_str,
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ExtractorError,
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find_xpath_attr,
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int_or_none,
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orderedSet,
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xpath_with_ns,
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)
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@ -24,20 +27,71 @@ class LivestreamIE(InfoExtractor):
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'ext': 'mp4',
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'title': 'Live from Webster Hall NYC',
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'upload_date': '20121012',
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'like_count': int,
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'view_count': int,
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'thumbnail': 're:^http://.*\.jpg$'
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}
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}
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def _extract_video_info(self, video_data):
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video_url = (
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video_data.get('progressive_url_hd') or
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video_data.get('progressive_url')
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video_id = compat_str(video_data['id'])
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FORMAT_KEYS = (
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('sd', 'progressive_url'),
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('hd', 'progressive_url_hd'),
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)
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formats = [{
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'format_id': format_id,
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'url': video_data[key],
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'quality': i + 1,
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} for i, (format_id, key) in enumerate(FORMAT_KEYS)
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if video_data.get(key)]
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smil_url = video_data.get('smil_url')
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if smil_url:
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_SWITCH_XPATH = (
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'.//{http://www.w3.org/2001/SMIL20/Language}body/'
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'{http://www.w3.org/2001/SMIL20/Language}switch')
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smil_doc = self._download_xml(
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smil_url, video_id, note='Downloading SMIL information')
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title_node = find_xpath_attr(
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smil_doc, './/{http://www.w3.org/2001/SMIL20/Language}meta',
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'name', 'title')
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if title_node is None:
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self.report_warning('Cannot find SMIL id')
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switch_node = smil_doc.find(_SWITCH_XPATH)
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else:
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title_id = title_node.attrib['content']
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switch_node = find_xpath_attr(
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smil_doc, _SWITCH_XPATH, 'id', title_id)
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if switch_node is None:
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raise ExtractorError('Cannot find switch node')
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video_nodes = switch_node.findall(
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'{http://www.w3.org/2001/SMIL20/Language}video')
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for vn in video_nodes:
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tbr = int_or_none(vn.attrib.get('system-bitrate'))
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furl = (
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'http://livestream-f.akamaihd.net/%s?v=3.0.3&fp=WIN%%2014,0,0,145&seek=%s' %
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(vn.attrib['src'], vn.attrib['clipBegin']))
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formats.append({
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'url': furl,
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'format_id': 'smil_%d' % tbr,
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'ext': 'flv',
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'tbr': tbr,
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'preference': -1000,
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})
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self._sort_formats(formats)
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return {
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'id': compat_str(video_data['id']),
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'url': video_url,
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'id': video_id,
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'formats': formats,
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'title': video_data['caption'],
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'thumbnail': video_data['thumbnail_url'],
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'thumbnail': video_data.get('thumbnail_url'),
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'upload_date': video_data['updated_at'].replace('-', '')[:8],
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'like_count': video_data.get('likes', {}).get('total'),
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'view_count': video_data.get('views'),
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}
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def _real_extract(self, url):
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@ -242,8 +242,8 @@ def write_json_file(obj, fn):
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if sys.version_info >= (2,7):
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def find_xpath_attr(node, xpath, key, val):
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""" Find the xpath xpath[@key=val] """
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assert re.match(r'^[a-zA-Z]+$', key)
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assert re.match(r'^[a-zA-Z0-9@\s:._]*$', val)
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assert re.match(r'^[a-zA-Z-]+$', key)
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assert re.match(r'^[a-zA-Z0-9@\s:._-]*$', val)
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expr = xpath + u"[@%s='%s']" % (key, val)
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return node.find(expr)
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else:
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