Merge pull request #1531 from rg3/no-playlist

[youtube] implement --no-playlist to only download current video

README.md

@@ -50,6 +50,7 @@ which means you can modify it, redistribute it or use it however you like.
     --date DATE                download only videos uploaded in this date
     --datebefore DATE          download only videos uploaded before this date
     --dateafter DATE           download only videos uploaded after this date
+    --no-playlist              download only the currently playing video
 
 ## Download Options:
     -r, --rate-limit LIMIT     maximum download rate (e.g. 50k or 44.6m)

test/test_youtube_lists.py

@@ -27,6 +27,14 @@ class TestYoutubeLists(unittest.TestCase):
         ytie_results = [YoutubeIE()._extract_id(url['url']) for url in result['entries']]
         self.assertEqual(ytie_results, [ 'bV9L5Ht9LgY', 'FXxLjLQi3Fg', 'tU3Bgo5qJZE'])
 
+    def test_youtube_playlist_noplaylist(self):
+        dl = FakeYDL()
+        dl.params['noplaylist'] = True
+        ie = YoutubePlaylistIE(dl)
+        result = ie.extract('https://www.youtube.com/watch?v=FXxLjLQi3Fg&list=PLwiyx1dc3P2JR9N8gQaQN_BCvlSlap7re')
+        self.assertEqual(result['_type'], 'url')
+        self.assertEqual(YoutubeIE()._extract_id(result['url']), 'FXxLjLQi3Fg')
+
     def test_issue_673(self):
         dl = FakeYDL()
         ie = YoutubePlaylistIE(dl)

youtube_dl/YoutubeDL.py

@@ -83,6 +83,7 @@ class YoutubeDL(object):
     skip_download:     Skip the actual download of the video file
     cachedir:          Location of the cache files in the filesystem.
                        None to disable filesystem cache.
+    noplaylist:        Download single video instead of a playlist if in doubt.
     
     The following parameters are not used by YoutubeDL itself, they are used by
     the FileDownloader:

youtube_dl/__init__.py

@@ -187,6 +187,7 @@ def parseOpts(overrideArguments=None):
     selection.add_option('--date', metavar='DATE', dest='date', help='download only videos uploaded in this date', default=None)
     selection.add_option('--datebefore', metavar='DATE', dest='datebefore', help='download only videos uploaded before this date', default=None)
     selection.add_option('--dateafter', metavar='DATE', dest='dateafter', help='download only videos uploaded after this date', default=None)
+    selection.add_option('--no-playlist', action='store_true', dest='noplaylist', help='download only the currently playing video', default=False)
 
 
     authentication.add_option('-u', '--username',
@@ -599,6 +600,7 @@ def _real_main(argv=None):
         'progress_with_newline': opts.progress_with_newline,
         'playliststart': opts.playliststart,
         'playlistend': opts.playlistend,
+        'noplaylist': opts.noplaylist,
         'logtostderr': opts.outtmpl == '-',
         'consoletitle': opts.consoletitle,
         'nopart': opts.nopart,

youtube_dl/extractor/youtube.py

@@ -23,6 +23,7 @@ from ..utils import (
     compat_urllib_error,
     compat_urllib_parse,
     compat_urllib_request,
+    compat_urlparse,
     compat_str,
 
     clean_html,
@@ -1525,9 +1526,19 @@ class YoutubePlaylistIE(InfoExtractor):
         mobj = re.match(self._VALID_URL, url, re.VERBOSE)
         if mobj is None:
             raise ExtractorError(u'Invalid URL: %s' % url)
+        playlist_id = mobj.group(1) or mobj.group(2)
+
+        # Check if it's a video-specific URL
+        query_dict = compat_urlparse.parse_qs(compat_urlparse.urlparse(url).query)
+        if 'v' in query_dict:
+            video_id = query_dict['v'][0]
+            if self._downloader.params.get('noplaylist'):
+                self.to_screen(u'Downloading just video %s because of --no-playlist' % video_id)
+                return self.url_result('https://www.youtube.com/watch?v=' + video_id, 'Youtube')
+            else:
+                self.to_screen(u'Downloading playlist PL%s - add --no-playlist to just download video %s' % (playlist_id, video_id))
 
         # Download playlist videos from API
-        playlist_id = mobj.group(1) or mobj.group(2)
         videos = []
 
         for page_num in itertools.count(1):