X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=youtube_dl%2Fextractor%2Fcommon.py;h=f498bcf6f5af1feb05eb8df0184f77e6336ac878;hb=9887c9b2d62258645de73aa69f18bfff5f540174;hp=6fa60622e096e518a55c4cfddd71ef5a4d9a862a;hpb=c3afc93a69fbfbe7712278f7ad03d0369ac9f885;p=youtube-dl

diff --git a/youtube_dl/extractor/common.py b/youtube_dl/extractor/common.py
index 6fa60622e..f498bcf6f 100644
--- a/youtube_dl/extractor/common.py
+++ b/youtube_dl/extractor/common.py
@@ -51,7 +51,8 @@ class InfoExtractor(object):
                                  Calculated from the format_id, width, height.
                                  and format_note fields if missing.
                     * format_id  A short description of the format
-                                 ("mp4_h264_opus" or "19")
+                                 ("mp4_h264_opus" or "19").
+                                Technically optional, but strongly recommended.
                     * format_note Additional info about the format
                                  ("3D" or "DASH video")
                     * width      Width of the video, if known
@@ -68,7 +69,8 @@ class InfoExtractor(object):
                                  download, lower-case.
                                  "http", "https", "rtsp", "rtmp" or so.
                     * preference Order number of this format. If this field is
-                                 present, the formats get sorted by this field.
+                                 present and not None, the formats get sorted
+                                 by this field.
                                  -1 for default (order by other properties),
                                  -2 or smaller for less than default.
     url:            Final video URL.
@@ -376,7 +378,7 @@ class InfoExtractor(object):
     @staticmethod
     def _og_regexes(prop):
         content_re = r'content=(?:"([^>]+?)"|\'(.+?)\')'
-        property_re = r'property=[\'"]og:%s[\'"]' % re.escape(prop)
+        property_re = r'(?:name|property)=[\'"]og:%s[\'"]' % re.escape(prop)
         template = r'<meta[^>]+?%s[^>]+?%s'
         return [
             template % (property_re, content_re),