Merge pull request #3927 from qrtt1/master

[youtube-dl] / youtube_dl / YoutubeDL.py

diff --git a/youtube_dl/YoutubeDL.py b/youtube_dl/YoutubeDL.py
index 31531855e8e43294c155c752cda3e0c397e0921a..578c8daf255048b90caaf6caa5f09825e1d2bfe6 100755 (executable)
--- a/youtube_dl/YoutubeDL.py
+++ b/youtube_dl/YoutubeDL.py
@@ -124,6 +124,7 @@ class YoutubeDL(object):
     nooverwrites:      Prevent overwriting files.
     playliststart:     Playlist item to start at.
     playlistend:       Playlist item to end at.
+    playlistreverse:   Download playlist items in reverse order.
     matchtitle:        Download only matching titles.
     rejecttitle:       Reject downloads for matching titles.
     logger:            Log messages to a logging.Logger instance.
@@ -622,15 +623,13 @@ class YoutubeDL(object):
                 ie_result['url'], ie_key=ie_result.get('ie_key'),
                 extra_info=extra_info, download=False, process=False)
 
-            new_result = ie_result.copy()
-            for f in ('_type', 'id', 'url', 'ext', 'player_url', 'formats',
-                      'entries', 'ie_key', 'duration',
-                      'subtitles', 'annotations', 'format',
-                      'thumbnail', 'thumbnails'):
-                if f in new_result:
-                    del new_result[f]
-                if f in info:
-                    new_result[f] = info[f]
+            force_properties = dict(
+                (k, v) for k, v in ie_result.items() if v is not None)
+            for f in ('_type', 'url'):
+                if f in force_properties:
+                    del force_properties[f]
+            new_result = info.copy()
+            new_result.update(force_properties)
 
             assert new_result.get('_type') != 'url_transparent'
 
@@ -672,6 +671,9 @@ class YoutubeDL(object):
                     "[%s] playlist %s: Downloading %d videos" %
                     (ie_result['extractor'], playlist, n_entries))
 
+            if self.params.get('playlistreverse', False):
+                entries = entries[::-1]
+
             for i, entry in enumerate(entries, 1):
                 self.to_screen('[download] Downloading video #%s of %s' % (i, n_entries))
                 extra = {