Fixed downloading of unrelated videos when downloading a YouTube playlist

youtube-dl

@@ -766,7 +766,7 @@ class FileDownloader(object):
 				raise MaxDownloadsReached()
 
 		filename = self.prepare_filename(info_dict)
-		
+
 		# Forced printings
 		if self.params.get('forcetitle', False):
 			print info_dict['title'].encode(preferredencoding(), 'xmlcharrefreplace')
@@ -842,7 +842,7 @@ class FileDownloader(object):
 				except (ContentTooShortError, ), err:
 					self.trouble(u'ERROR: content too short (expected %s bytes and served %s)' % (err.expected, err.downloaded))
 					return
-	
+
 			if success:
 				try:
 					self.post_process(filename, info_dict)
@@ -1183,7 +1183,7 @@ class YoutubeIE(InfoExtractor):
 		'43': '360x640',
 		'44': '480x854',
 		'45': '720x1280',
-	}	
+	}
 	IE_NAME = u'youtube'
 
 	def report_lang(self):
@@ -2519,7 +2519,7 @@ class YoutubePlaylistIE(InfoExtractor):
 
 	_VALID_URL = r'(?:https?://)?(?:\w+\.)?youtube\.com/(?:(?:course|view_play_list|my_playlists|artist|playlist)\?.*?(p|a|list)=|user/.*?/user/|p/|user/.*?#[pg]/c/)(?:PL)?([0-9A-Za-z-_]+)(?:/.*?/([0-9A-Za-z_-]+))?.*'
 	_TEMPLATE_URL = 'http://www.youtube.com/%s?%s=%s&page=%s&gl=US&hl=en'
-	_VIDEO_INDICATOR = r'/watch\?v=(.+?)&'
+	_VIDEO_INDICATOR_TEMPLATE = r'/watch\?v=(.+?)&list=PL%s&'
 	_MORE_PAGES_INDICATOR = r'(?m)>\s*Next\s*</a>'
 	_youtube_ie = None
 	IE_NAME = u'youtube:playlist'
@@ -2571,7 +2571,8 @@ class YoutubePlaylistIE(InfoExtractor):
 
 			# Extract video identifiers
 			ids_in_page = []
-			for mobj in re.finditer(self._VIDEO_INDICATOR, page):
+			video_indicator = self._VIDEO_INDICATOR_TEMPLATE % playlist_id
+			for mobj in re.finditer(video_indicator, page):
 				if mobj.group(1) not in ids_in_page:
 					ids_in_page.append(mobj.group(1))
 			video_ids.extend(ids_in_page)
@@ -2582,7 +2583,11 @@ class YoutubePlaylistIE(InfoExtractor):
 
 		playliststart = self._downloader.params.get('playliststart', 1) - 1
 		playlistend = self._downloader.params.get('playlistend', -1)
-		video_ids = video_ids[playliststart:playlistend]
+
+		if playlistend == -1:
+			video_ids = video_ids[playliststart:]
+		else:
+			video_ids = video_ids[playliststart:playlistend]
 
 		for id in video_ids:
 			self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % id)
@@ -3028,14 +3033,14 @@ class BlipTVIE(InfoExtractor):
 					data = json_data['Post']
 				else:
 					data = json_data
-	
+
 				upload_date = datetime.datetime.strptime(data['datestamp'], '%m-%d-%y %H:%M%p').strftime('%Y%m%d')
 				video_url = data['media']['url']
 				umobj = re.match(self._URL_EXT, video_url)
 				if umobj is None:
 					raise ValueError('Can not determine filename extension')
 				ext = umobj.group(1)
-	
+
 				info = {
 					'id': data['item_id'],
 					'url': video_url,
@@ -3069,7 +3074,7 @@ class MyVideoIE(InfoExtractor):
 
 	def __init__(self, downloader=None):
 		InfoExtractor.__init__(self, downloader)
-	
+
 	def report_download_webpage(self, video_id):
 		"""Report webpage download."""
 		self._downloader.to_screen(u'[myvideo] %s: Downloading webpage' % video_id)
@@ -3136,7 +3141,7 @@ class ComedyCentralIE(InfoExtractor):
 
 	def report_extraction(self, episode_id):
 		self._downloader.to_screen(u'[comedycentral] %s: Extracting information' % episode_id)
-	
+
 	def report_config_download(self, episode_id):
 		self._downloader.to_screen(u'[comedycentral] %s: Downloading configuration' % episode_id)
 
@@ -3563,7 +3568,7 @@ class SoundcloudIE(InfoExtractor):
 		mobj = re.search('track-description-value"><p>(.*?)</p>', webpage)
 		if mobj:
 			description = mobj.group(1)
-		
+
 		# upload date
 		upload_date = None
 		mobj = re.search("pretty-date'>on ([\w]+ [\d]+, [\d]+ \d+:\d+)</abbr></h2>", webpage)
@@ -3698,7 +3703,7 @@ class MixcloudIE(InfoExtractor):
 			url_list = jsonData[fmt][bitrate]
 		except TypeError: # we have no bitrate info.
 			url_list = jsonData[fmt]
-				
+
 		return url_list
 
 	def check_urls(self, url_list):
@@ -3818,7 +3823,7 @@ class StanfordOpenClassroomIE(InfoExtractor):
 			info = {
 				'id': _simplify_title(course + '_' + video),
 			}
-	
+
 			self.report_extraction(info['id'])
 			baseUrl = 'http://openclassroom.stanford.edu/MainFolder/courses/' + course + '/videos/'
 			xmlUrl = baseUrl + video + '.xml'
@@ -3952,7 +3957,7 @@ class MTVIE(InfoExtractor):
 			self._downloader.trouble(u'ERROR: unable to extract performer')
 			return
 		performer = _unescapeHTML(mobj.group(1).decode('iso-8859-1'))
-		video_title = performer + ' - ' + song_name 
+		video_title = performer + ' - ' + song_name
 
 		mobj = re.search(r'<meta name="mtvn_uri" content="([^"]+)"/>', webpage)
 		if mobj is None:
@@ -4194,7 +4199,7 @@ def updateSelf(downloader, filename):
 		try:
 			urlh = urllib.urlopen(UPDATE_URL)
 			newcontent = urlh.read()
-			
+
 			vmatch = re.search("__version__ = '([^']+)'", newcontent)
 			if vmatch is not None and vmatch.group(1) == __version__:
 				downloader.to_screen(u'youtube-dl is up-to-date (' + __version__ + ')')
@@ -4615,7 +4620,7 @@ def _real_main():
 			parser.error(u'you must provide at least one URL')
 		else:
 			sys.exit()
-	
+
 	try:
 		retcode = fd.download(all_urls)
 	except MaxDownloadsReached: