Add display_id field

diff --git a/youtube_dl/YoutubeDL.py b/youtube_dl/YoutubeDL.py
index 42cbcf6994567e09b3f35eec3f3f0a71494eb4f5..47205efae69393840f6a200e5722d2a1831753d2 100644 (file)
--- a/youtube_dl/YoutubeDL.py
+++ b/youtube_dl/YoutubeDL.py
@@ -675,6 +675,9 @@ class YoutubeDL(object):
             info_dict['playlist'] = None
             info_dict['playlist_index'] = None
 
+        if 'display_id' not in info_dict:
+            info_dict['display_id'] = info_dict['id']
+
         # This extractors handle format selection themselves
         if info_dict['extractor'] in ['Youku']:
             if download:

diff --git a/youtube_dl/extractor/common.py b/youtube_dl/extractor/common.py
index 84fca8ba0b2577696877c117a13fcc0a5ce40735..080c9bdfada0440201a85027ddbb34772d09b28f 100644 (file)
--- a/youtube_dl/extractor/common.py
+++ b/youtube_dl/extractor/common.py
@@ -88,6 +88,10 @@ class InfoExtractor(object):
 
     The following fields are optional:
 
+    display_id      An alternative identifier for the video, not necessarily
+                    unique, but available before title. Typically, id is
+                    something like "4234987", title "Dancing naked mole rats",
+                    and display_id "dancing-naked-mole-rats"
     thumbnails:     A list of dictionaries (with the entries "resolution" and
                     "url") for the varying thumbnails
     thumbnail:      Full URL to a video thumbnail image.