Bump version number

Fixes issue #19.

.hgignore

@@ -1,2 +0,0 @@
-syntax: glob
-.*.swp

LATEST_VERSION

@@ -0,0 +1 @@
+2009.09.13

youtube-dl

@@ -19,7 +19,7 @@ import urllib
 import urllib2
 
 std_headers = {
-	'User-Agent': 'Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.0.8) Gecko/2009032609 Firefox/3.0.8',
+	'User-Agent': 'Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2',
 	'Accept-Charset': 'ISO-8859-1,utf-8;q=0.7,*;q=0.7',
 	'Accept': 'text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5',
 	'Accept-Language': 'en-us,en;q=0.5',
@@ -27,6 +27,22 @@ std_headers = {
 
 simple_title_chars = string.ascii_letters.decode('ascii') + string.digits.decode('ascii')
 
+def preferredencoding():
+	"""Get preferred encoding.
+
+	Returns the best encoding scheme for the system, based on
+	locale.getpreferredencoding() and some further tweaks.
+	"""
+	try:
+		pref = locale.getpreferredencoding()
+		# Mac OSX systems have this problem sometimes
+		if pref == '':
+			return 'UTF-8'
+		return pref
+	except:
+		sys.stderr.write('WARNING: problem obtaining preferred encoding. Falling back to UTF-8.\n')
+		return 'UTF-8'
+
 class DownloadError(Exception):
 	"""Download Error exception.
 	
@@ -52,6 +68,29 @@ class PostProcessingError(Exception):
 	"""
 	pass
 
+class UnavailableFormatError(Exception):
+	"""Unavailable Format exception.
+
+	This exception will be thrown when a video is requested
+	in a format that is not available for that video.
+	"""
+	pass
+
+class ContentTooShortError(Exception):
+	"""Content Too Short exception.
+
+	This exception may be raised by FileDownloader objects when a file they
+	download is too small for what the server announced first, indicating
+	the connection was probably interrupted.
+	"""
+	# Both in bytes
+	downloaded = None
+	expected = None
+
+	def __init__(self, downloaded, expected):
+		self.downloaded = downloaded
+		self.expected = expected
+
 class FileDownloader(object):
 	"""File Downloader class.
 
@@ -91,6 +130,7 @@ class FileDownloader(object):
 	ignoreerrors:	Do not stop on download errors.
 	ratelimit:	Download speed limit, in bytes/sec.
 	nooverwrites:	Prevent overwriting files.
+	continuedl:	Try to continue downloads if possible.
 	"""
 
 	params = None
@@ -119,10 +159,12 @@ class FileDownloader(object):
 	def format_bytes(bytes):
 		if bytes is None:
 			return 'N/A'
-		if bytes == 0:
+		if type(bytes) is str:
+			bytes = float(bytes)
+		if bytes == 0.0:
 			exponent = 0
 		else:
-			exponent = long(math.log(float(bytes), 1024.0))
+			exponent = long(math.log(bytes, 1024.0))
 		suffix = 'bkMGTPEZY'[exponent]
 		converted = float(bytes) / float(1024**exponent)
 		return '%.2f%s' % (converted, suffix)
@@ -159,13 +201,13 @@ class FileDownloader(object):
 		new_min = max(bytes / 2.0, 1.0)
 		new_max = min(max(bytes * 2.0, 1.0), 4194304) # Do not surpass 4 MB
 		if elapsed_time < 0.001:
-			return int(new_max)
+			return long(new_max)
 		rate = bytes / elapsed_time
 		if rate > new_max:
-			return int(new_max)
+			return long(new_max)
 		if rate < new_min:
-			return int(new_min)
-		return int(rate)
+			return long(new_min)
+		return long(rate)
 
 	@staticmethod
 	def parse_bytes(bytestr):
@@ -177,6 +219,16 @@ class FileDownloader(object):
 		multiplier = 1024.0 ** 'bkmgtpezy'.index(matchobj.group(2).lower())
 		return long(round(number * multiplier))
 
+	@staticmethod
+	def verify_url(url):
+		"""Verify a URL is valid and data could be downloaded. Return real data URL."""
+		request = urllib2.Request(url, None, std_headers)
+		data = urllib2.urlopen(request)
+		data.read(1)
+		url = data.geturl()
+		data.close()
+		return url
+
 	def add_info_extractor(self, ie):
 		"""Add an InfoExtractor object to the end of the list."""
 		self._ies.append(ie)
@@ -190,12 +242,12 @@ class FileDownloader(object):
 	def to_stdout(self, message, skip_eol=False):
 		"""Print message to stdout if not in quiet mode."""
 		if not self.params.get('quiet', False):
-			print (u'%s%s' % (message, [u'\n', u''][skip_eol])).encode(locale.getpreferredencoding()),
+			print (u'%s%s' % (message, [u'\n', u''][skip_eol])).encode(preferredencoding()),
 			sys.stdout.flush()
 	
 	def to_stderr(self, message):
 		"""Print message to stderr."""
-		print >>sys.stderr, message
+		print >>sys.stderr, message.encode(preferredencoding())
 	
 	def fixed_template(self):
 		"""Checks if the output template is fixed."""
@@ -235,6 +287,18 @@ class FileDownloader(object):
 		"""Report download progress."""
 		self.to_stdout(u'\r[download] %s of %s at %s ETA %s' %
 				(percent_str, data_len_str, speed_str, eta_str), skip_eol=True)
+
+	def report_resuming_byte(self, resume_len):
+		"""Report attemtp to resume at given byte."""
+		self.to_stdout(u'[download] Resuming download at byte %s' % resume_len)
+	
+	def report_file_already_downloaded(self, file_name):
+		"""Report file has already been fully downloaded."""
+		self.to_stdout(u'[download] %s has already been downloaded' % file_name)
+	
+	def report_unable_to_resume(self):
+		"""Report it was impossible to resume download."""
+		self.to_stdout(u'[download] Unable to resume')
 	
 	def report_finish(self):
 		"""Report download finished."""
@@ -242,50 +306,54 @@ class FileDownloader(object):
 
 	def process_info(self, info_dict):
 		"""Process a single dictionary returned by an InfoExtractor."""
-		# Forced printings
-		if self.params.get('forcetitle', False):
-			print info_dict['title'].encode(locale.getpreferredencoding())
-		if self.params.get('forceurl', False):
-			print info_dict['url'].encode(locale.getpreferredencoding())
-			
 		# Do nothing else if in simulate mode
 		if self.params.get('simulate', False):
-			return
+			try:
+				info_dict['url'] = self.verify_url(info_dict['url'])
+			except (OSError, IOError, urllib2.URLError, httplib.HTTPException, socket.error), err:
+				raise UnavailableFormatError
 
+			# Forced printings
+			if self.params.get('forcetitle', False):
+				print info_dict['title'].encode(preferredencoding())
+			if self.params.get('forceurl', False):
+				print info_dict['url'].encode(preferredencoding())
+
+			return
+			
 		try:
-			filename = self.params['outtmpl'] % info_dict
-			self.report_destination(filename)
+			template_dict = dict(info_dict)
+			template_dict['epoch'] = unicode(long(time.time()))
+			filename = self.params['outtmpl'] % template_dict
 		except (ValueError, KeyError), err:
 			self.trouble('ERROR: invalid output template or system charset: %s' % str(err))
 		if self.params['nooverwrites'] and os.path.exists(filename):
-			self.to_stderr('WARNING: file exists: %s; skipping' % filename)
+			self.to_stderr(u'WARNING: file exists: %s; skipping' % filename)
 			return
+
 		try:
 			self.pmkdir(filename)
 		except (OSError, IOError), err:
 			self.trouble('ERROR: unable to create directories: %s' % str(err))
 			return
+
 		try:
-			outstream = open(filename, 'wb')
+			success = self._do_download(filename, info_dict['url'])
 		except (OSError, IOError), err:
-			self.trouble('ERROR: unable to open for writing: %s' % str(err))
-			return
-		try:
-			self._do_download(outstream, info_dict['url'])
-			outstream.close()
-		except (OSError, IOError), err:
-			self.trouble('ERROR: unable to write video data: %s' % str(err))
-			return
+			raise UnavailableFormatError
 		except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 			self.trouble('ERROR: unable to download video data: %s' % str(err))
 			return
-		try:
-			self.post_process(filename, info_dict)
-		except (PostProcessingError), err:
-			self.trouble('ERROR: postprocessing: %s' % str(err))
+		except (ContentTooShortError, ), err:
+			self.trouble('ERROR: content too short (expected %s bytes and served %s)' % (err.expected, err.downloaded))
 			return
 
-		return
+		if success:
+			try:
+				self.post_process(filename, info_dict)
+			except (PostProcessingError), err:
+				self.trouble('ERROR: postprocessing: %s' % str(err))
+				return
 
 	def download(self, url_list):
 		"""Download a given list of URLs."""
@@ -322,21 +390,43 @@ class FileDownloader(object):
 			if info is None:
 				break
 	
-	def _do_download(self, stream, url):
+	def _do_download(self, filename, url):
+		stream = None
+		open_mode = 'ab'
+
+		basic_request = urllib2.Request(url, None, std_headers)
 		request = urllib2.Request(url, None, std_headers)
-		data = urllib2.urlopen(request)
+
+		# Attempt to resume download with "continuedl" option
+		if os.path.isfile(filename):
+			resume_len = os.path.getsize(filename)
+		else:
+			resume_len = 0
+		if self.params['continuedl'] and resume_len != 0:
+			self.report_resuming_byte(resume_len)
+			request.add_header('Range','bytes=%d-' % resume_len)
+
+		# Establish connection
+		try:
+			data = urllib2.urlopen(request)
+		except (urllib2.HTTPError, ), err:
+			if err.code != 416: #  416 is 'Requested range not satisfiable'
+				raise
+			data = urllib2.urlopen(basic_request)
+			content_length = data.info()['Content-Length']
+			if content_length is not None and long(content_length) == resume_len:
+				self.report_file_already_downloaded(filename)
+				return True
+			else:
+				self.report_unable_to_resume()
+				open_mode = 'wb'
+
 		data_len = data.info().get('Content-length', None)
 		data_len_str = self.format_bytes(data_len)
 		byte_counter = 0
 		block_size = 1024
 		start = time.time()
 		while True:
-			# Progress message
-			percent_str = self.calc_percent(byte_counter, data_len)
-			eta_str = self.calc_eta(start, time.time(), data_len, byte_counter)
-			speed_str = self.calc_speed(start, time.time(), byte_counter)
-			self.report_progress(percent_str, data_len_str, speed_str, eta_str)
-
 			# Download and write
 			before = time.time()
 			data_block = data.read(block_size)
@@ -345,15 +435,31 @@ class FileDownloader(object):
 			if data_block_len == 0:
 				break
 			byte_counter += data_block_len
+
+			# Open file just in time
+			if stream is None:
+				try:
+					stream = open(filename, open_mode)
+					self.report_destination(filename)
+				except (OSError, IOError), err:
+					self.trouble('ERROR: unable to open for writing: %s' % str(err))
+					return False
 			stream.write(data_block)
 			block_size = self.best_block_size(after - before, data_block_len)
 
+			# Progress message
+			percent_str = self.calc_percent(byte_counter, data_len)
+			eta_str = self.calc_eta(start, time.time(), data_len, byte_counter)
+			speed_str = self.calc_speed(start, time.time(), byte_counter)
+			self.report_progress(percent_str, data_len_str, speed_str, eta_str)
+
 			# Apply rate limit
 			self.slow_down(start, byte_counter)
 
 		self.report_finish()
 		if data_len is not None and str(byte_counter) != data_len:
-			raise ValueError('Content too short: %s/%s bytes' % (byte_counter, data_len))
+			raise ContentTooShortError(byte_counter, long(data_len))
+		return True
 
 class InfoExtractor(object):
 	"""Information Extractor class.
@@ -424,6 +530,13 @@ class YoutubeIE(InfoExtractor):
 	_LOGIN_URL = 'http://www.youtube.com/signup?next=/&gl=US&hl=en'
 	_AGE_URL = 'http://www.youtube.com/verify_age?next_url=/&gl=US&hl=en'
 	_NETRC_MACHINE = 'youtube'
+	_available_formats = ['22', '35', '18', '5', '17', '13', None] # listed in order of priority for -b flag
+	_video_extensions = {
+		'13': '3gp',
+		'17': 'mp4',
+		'18': 'mp4',
+		'22': 'mp4',
+	}
 
 	@staticmethod
 	def suitable(url):
@@ -464,17 +577,17 @@ class YoutubeIE(InfoExtractor):
 		"""Report attempt to confirm age."""
 		self._downloader.to_stdout(u'[youtube] Confirming age')
 	
-	def report_webpage_download(self, video_id):
-		"""Report attempt to download webpage."""
-		self._downloader.to_stdout(u'[youtube] %s: Downloading video webpage' % video_id)
+	def report_video_info_webpage_download(self, video_id):
+		"""Report attempt to download video info webpage."""
+		self._downloader.to_stdout(u'[youtube] %s: Downloading video info webpage' % video_id)
 	
 	def report_information_extraction(self, video_id):
 		"""Report attempt to extract video information."""
 		self._downloader.to_stdout(u'[youtube] %s: Extracting video information' % video_id)
 	
-	def report_video_url(self, video_id, video_real_url):
+	def report_unavailable_format(self, video_id, format):
 		"""Report extracted video URL."""
-		self._downloader.to_stdout(u'[youtube] %s: URL: %s' % (video_id, video_real_url))
+		self._downloader.to_stdout(u'[youtube] %s: Format %s not available' % (video_id, format))
 	
 	def _real_initialize(self):
 		if self._downloader is None:
@@ -554,70 +667,99 @@ class YoutubeIE(InfoExtractor):
 		video_id = mobj.group(2)
 
 		# Downloader parameters
+		best_quality = False
 		format_param = None
+		quality_index = 0
 		if self._downloader is not None:
 			params = self._downloader.params
 			format_param = params.get('format', None)
+			if format_param == '0':
+				format_param = self._available_formats[quality_index]
+				best_quality = True
 
-		# Extension
-		video_extension = {
-			'17': '3gp',
-			'18': 'mp4',
-			'22': 'mp4',
-		}.get(format_param, 'flv')
+		while True:
+			# Extension
+			video_extension = self._video_extensions.get(format_param, 'flv')
 
-		# Normalize URL, including format
-		normalized_url = 'http://www.youtube.com/watch?v=%s&gl=US&hl=en' % video_id
-		if format_param is not None:
-			normalized_url = '%s&fmt=%s' % (normalized_url, format_param)
-		request = urllib2.Request(normalized_url, None, std_headers)
-		try:
-			self.report_webpage_download(video_id)
-			video_webpage = urllib2.urlopen(request).read()
-		except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-			self._downloader.trouble(u'ERROR: unable to download video webpage: %s' % str(err))
-			return
-		self.report_information_extraction(video_id)
-		
-		# "t" param
-		mobj = re.search(r', "t": "([^"]+)"', video_webpage)
-		if mobj is None:
-			self._downloader.trouble(u'ERROR: unable to extract "t" parameter')
-			return
-		video_real_url = 'http://www.youtube.com/get_video?video_id=%s&t=%s&el=detailpage&ps=' % (video_id, mobj.group(1))
-		if format_param is not None:
-			video_real_url = '%s&fmt=%s' % (video_real_url, format_param)
-		self.report_video_url(video_id, video_real_url)
+			# Get video info
+			video_info_url = 'http://www.youtube.com/get_video_info?&video_id=%s&el=detailpage&ps=default&eurl=&gl=US&hl=en' % video_id
+			request = urllib2.Request(video_info_url, None, std_headers)
+			try:
+				self.report_video_info_webpage_download(video_id)
+				video_info_webpage = urllib2.urlopen(request).read()
+			except (urllib2.URLError, httplib.HTTPException, socket.error), err:
+				self._downloader.trouble(u'ERROR: unable to download video info webpage: %s' % str(err))
+				return
+			self.report_information_extraction(video_id)
 
-		# uploader
-		mobj = re.search(r"var watchUsername = '([^']+)';", video_webpage)
-		if mobj is None:
-			self._downloader.trouble(u'ERROR: unable to extract uploader nickname')
-			return
-		video_uploader = mobj.group(1)
+			# "t" param
+			mobj = re.search(r'(?m)&token=([^&]+)(?:&|$)', video_info_webpage)
+			if mobj is None:
+				# Attempt to see if YouTube has issued an error message
+				mobj = re.search(r'(?m)&reason=([^&]+)(?:&|$)', video_info_webpage)
+				if mobj is None:
+					self._downloader.trouble(u'ERROR: unable to extract "t" parameter for unknown reason')
+					stream = open('reportme-ydl-%s.dat' % time.time(), 'wb')
+					stream.write(video_info_webpage)
+					stream.close()
+				else:
+					reason = urllib.unquote_plus(mobj.group(1))
+					self._downloader.trouble(u'ERROR: YouTube said: %s' % reason.decode('utf-8'))
+				return
+			token = urllib.unquote(mobj.group(1))
+			video_real_url = 'http://www.youtube.com/get_video?video_id=%s&t=%s&eurl=&el=detailpage&ps=default&gl=US&hl=en' % (video_id, token)
+			if format_param is not None:
+				video_real_url = '%s&fmt=%s' % (video_real_url, format_param)
 
-		# title
-		mobj = re.search(r'(?im)<title>YouTube - ([^<]*)</title>', video_webpage)
-		if mobj is None:
-			self._downloader.trouble(u'ERROR: unable to extract video title')
-			return
-		video_title = mobj.group(1).decode('utf-8')
-		video_title = re.sub(ur'(?u)&(.+?);', self.htmlentity_transform, video_title)
-		video_title = video_title.replace(os.sep, u'%')
+			# uploader
+			mobj = re.search(r'(?m)&author=([^&]+)(?:&|$)', video_info_webpage)
+			if mobj is None:
+				self._downloader.trouble(u'ERROR: unable to extract uploader nickname')
+				return
+			video_uploader = urllib.unquote(mobj.group(1))
 
-		# simplified title
-		simple_title = re.sub(ur'(?u)([^%s]+)' % simple_title_chars, ur'_', video_title)
-		simple_title = simple_title.strip(ur'_')
+			# title
+			mobj = re.search(r'(?m)&title=([^&]+)(?:&|$)', video_info_webpage)
+			if mobj is None:
+				self._downloader.trouble(u'ERROR: unable to extract video title')
+				return
+			video_title = urllib.unquote(mobj.group(1))
+			video_title = video_title.decode('utf-8')
+			video_title = re.sub(ur'(?u)&(.+?);', self.htmlentity_transform, video_title)
+			video_title = video_title.replace(os.sep, u'%')
+
+			# simplified title
+			simple_title = re.sub(ur'(?u)([^%s]+)' % simple_title_chars, ur'_', video_title)
+			simple_title = simple_title.strip(ur'_')
+
+			try:
+				# Process video information
+				self._downloader.process_info({
+					'id':		video_id.decode('utf-8'),
+					'url':		video_real_url.decode('utf-8'),
+					'uploader':	video_uploader.decode('utf-8'),
+					'title':	video_title,
+					'stitle':	simple_title,
+					'ext':		video_extension.decode('utf-8'),
+				})
+
+				return
+
+			except UnavailableFormatError, err:
+				if best_quality:
+					if quality_index == len(self._available_formats) - 1:
+						# I don't ever expect this to happen
+						self._downloader.trouble(u'ERROR: no known formats available for video')
+						return
+					else:
+						self.report_unavailable_format(video_id, format_param)
+						quality_index += 1
+						format_param = self._available_formats[quality_index]
+						continue
+				else: 
+					self._downloader.trouble('ERROR: format not available for video')
+					return
 
-		# Process video information
-		self._downloader.process_info({
-			'id':		video_id.decode('utf-8'),
-			'url':		video_real_url.decode('utf-8'),
-			'uploader':	video_uploader.decode('utf-8'),
-			'title':	video_title,
-			'stitle':	simple_title,
-			'ext':		video_extension.decode('utf-8'),
-			})
 
 class MetacafeIE(InfoExtractor):
 	"""Information Extractor for metacafe.com."""
@@ -703,19 +845,21 @@ class MetacafeIE(InfoExtractor):
 
 		# Extract URL, uploader and title from webpage
 		self.report_extraction(video_id)
-		mobj = re.search(r'(?m)&mediaURL=(http.*?\.flv)', webpage)
+		mobj = re.search(r'(?m)&mediaURL=([^&]+)', webpage)
 		if mobj is None:
 			self._downloader.trouble(u'ERROR: unable to extract media URL')
 			return
 		mediaURL = urllib.unquote(mobj.group(1))
 
-		mobj = re.search(r'(?m)&gdaKey=(.*?)&', webpage)
-		if mobj is None:
-			self._downloader.trouble(u'ERROR: unable to extract gdaKey')
-			return
-		gdaKey = mobj.group(1)
+		#mobj = re.search(r'(?m)&gdaKey=(.*?)&', webpage)
+		#if mobj is None:
+		#	self._downloader.trouble(u'ERROR: unable to extract gdaKey')
+		#	return
+		#gdaKey = mobj.group(1)
+		#
+		#video_url = '%s?__gda__=%s' % (mediaURL, gdaKey)
 
-		video_url = '%s?__gda__=%s' % (mediaURL, gdaKey)
+		video_url = mediaURL
 
 		mobj = re.search(r'(?im)<title>(.*) - Video</title>', webpage)
 		if mobj is None:
@@ -729,15 +873,18 @@ class MetacafeIE(InfoExtractor):
 			return
 		video_uploader = mobj.group(1)
 
-		# Process video information
-		self._downloader.process_info({
-			'id':		video_id.decode('utf-8'),
-			'url':		video_url.decode('utf-8'),
-			'uploader':	video_uploader.decode('utf-8'),
-			'title':	video_title,
-			'stitle':	simple_title,
-			'ext':		video_extension.decode('utf-8'),
+		try:
+			# Process video information
+			self._downloader.process_info({
+				'id':		video_id.decode('utf-8'),
+				'url':		video_url.decode('utf-8'),
+				'uploader':	video_uploader.decode('utf-8'),
+				'title':	video_title,
+				'stitle':	simple_title,
+				'ext':		video_extension.decode('utf-8'),
 			})
+		except UnavailableFormatError:
+			self._downloader.trouble(u'ERROR: format not available for video')
 
 
 class YoutubeSearchIE(InfoExtractor):
@@ -745,7 +892,7 @@ class YoutubeSearchIE(InfoExtractor):
 	_VALID_QUERY = r'ytsearch(\d+|all)?:[\s\S]+'
 	_TEMPLATE_URL = 'http://www.youtube.com/results?search_query=%s&page=%s&gl=US&hl=en'
 	_VIDEO_INDICATOR = r'href="/watch\?v=.+?"'
-	_MORE_PAGES_INDICATOR = r'>Next</a>'
+	_MORE_PAGES_INDICATOR = r'(?m)>\s*Next\s*</a>'
 	_youtube_ie = None
 	_max_youtube_results = 1000
 
@@ -780,7 +927,7 @@ class YoutubeSearchIE(InfoExtractor):
 			return
 		else:
 			try:
-				n = int(prefix)
+				n = long(prefix)
 				if n <= 0:
 					self._downloader.trouble(u'ERROR: invalid download number %s for query "%s"' % (n, query))
 					return
@@ -789,7 +936,7 @@ class YoutubeSearchIE(InfoExtractor):
 					n = self._max_youtube_results
 				self._download_n_results(query, n)
 				return
-			except ValueError: # parsing prefix as int fails
+			except ValueError: # parsing prefix as integer fails
 				self._download_n_results(query, 1)
 				return
 
@@ -822,7 +969,7 @@ class YoutubeSearchIE(InfoExtractor):
 							self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % id)
 						return
 
-			if self._MORE_PAGES_INDICATOR not in page:
+			if re.search(self._MORE_PAGES_INDICATOR, page) is None:
 				for id in video_ids:
 					self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % id)
 				return
@@ -832,10 +979,10 @@ class YoutubeSearchIE(InfoExtractor):
 class YoutubePlaylistIE(InfoExtractor):
 	"""Information Extractor for YouTube playlists."""
 
-	_VALID_URL = r'(?:http://)?(?:\w+\.)?youtube.com/view_play_list\?p=(.+)'
+	_VALID_URL = r'(?:http://)?(?:\w+\.)?youtube.com/(?:view_play_list|my_playlists)\?.*?p=([^&]+).*'
 	_TEMPLATE_URL = 'http://www.youtube.com/view_play_list?p=%s&page=%s&gl=US&hl=en'
 	_VIDEO_INDICATOR = r'/watch\?v=(.+?)&'
-	_MORE_PAGES_INDICATOR = r'/view_play_list?p=%s&amp;page=%s'
+	_MORE_PAGES_INDICATOR = r'/view_play_list?p=%s&page=%s'
 	_youtube_ie = None
 
 	def __init__(self, youtube_ie, downloader=None):
@@ -881,7 +1028,7 @@ class YoutubePlaylistIE(InfoExtractor):
 					ids_in_page.append(mobj.group(1))
 			video_ids.extend(ids_in_page)
 
-			if (self._MORE_PAGES_INDICATOR % (playlist_id, pagenum + 1)) not in page:
+			if (self._MORE_PAGES_INDICATOR % (playlist_id.upper(), pagenum + 1)) not in page:
 				break
 			pagenum = pagenum + 1
 
@@ -919,7 +1066,7 @@ class PostProcessor(object):
 		"""Run the PostProcessor.
 
 		The "information" argument is a dictionary like the ones
-		returned by InfoExtractors. The only difference is that this
+		composed by InfoExtractors. The only difference is that this
 		one has an extra field called "filepath" that points to the
 		downloaded file.
 
@@ -949,76 +1096,96 @@ if __name__ == '__main__':
 
 		# Parse command line
 		parser = optparse.OptionParser(
-				usage='Usage: %prog [options] url...',
-				version='2009.04.25',
-				conflict_handler='resolve',
-				)
+			usage='Usage: %prog [options] url...',
+			version='2009.09.13',
+			conflict_handler='resolve',
+		)
+
 		parser.add_option('-h', '--help',
 				action='help', help='print this help text and exit')
 		parser.add_option('-v', '--version',
 				action='version', help='print program version and exit')
-		parser.add_option('-u', '--username',
-				dest='username', metavar='UN', help='account username')
-		parser.add_option('-p', '--password',
-				dest='password', metavar='PW', help='account password')
-		parser.add_option('-o', '--output',
-				dest='outtmpl', metavar='TPL', help='output filename template')
-		parser.add_option('-q', '--quiet',
-				action='store_true', dest='quiet', help='activates quiet mode', default=False)
-		parser.add_option('-s', '--simulate',
-				action='store_true', dest='simulate', help='do not download video', default=False)
-		parser.add_option('-t', '--title',
-				action='store_true', dest='usetitle', help='use title in file name', default=False)
-		parser.add_option('-l', '--literal',
-				action='store_true', dest='useliteral', help='use literal title in file name', default=False)
-		parser.add_option('-n', '--netrc',
-				action='store_true', dest='usenetrc', help='use .netrc authentication data', default=False)
-		parser.add_option('-g', '--get-url',
-				action='store_true', dest='geturl', help='simulate, quiet but print URL', default=False)
-		parser.add_option('-e', '--get-title',
-				action='store_true', dest='gettitle', help='simulate, quiet but print title', default=False)
-		parser.add_option('-f', '--format',
-				dest='format', metavar='FMT', help='video format code')
-		parser.add_option('-m', '--mobile-version',
-				action='store_const', dest='format', help='alias for -f 17', const='17')
-		parser.add_option('-d', '--high-def',
-				action='store_const', dest='format', help='alias for -f 22', const='22')
 		parser.add_option('-i', '--ignore-errors',
 				action='store_true', dest='ignoreerrors', help='continue on download errors', default=False)
 		parser.add_option('-r', '--rate-limit',
 				dest='ratelimit', metavar='L', help='download rate limit (e.g. 50k or 44.6m)')
-		parser.add_option('-a', '--batch-file',
+
+		authentication = optparse.OptionGroup(parser, 'Authentication Options')
+		authentication.add_option('-u', '--username',
+				dest='username', metavar='UN', help='account username')
+		authentication.add_option('-p', '--password',
+				dest='password', metavar='PW', help='account password')
+		authentication.add_option('-n', '--netrc',
+				action='store_true', dest='usenetrc', help='use .netrc authentication data', default=False)
+		parser.add_option_group(authentication)
+
+		video_format = optparse.OptionGroup(parser, 'Video Format Options')
+		video_format.add_option('-f', '--format',
+				action='store', dest='format', metavar='FMT', help='video format code')
+		video_format.add_option('-b', '--best-quality',
+				action='store_const', dest='format', help='download the best quality video possible', const='0')
+		video_format.add_option('-m', '--mobile-version',
+				action='store_const', dest='format', help='alias for -f 17', const='17')
+		video_format.add_option('-d', '--high-def',
+				action='store_const', dest='format', help='alias for -f 22', const='22')
+		parser.add_option_group(video_format)
+
+		verbosity = optparse.OptionGroup(parser, 'Verbosity / Simulation Options')
+		verbosity.add_option('-q', '--quiet',
+				action='store_true', dest='quiet', help='activates quiet mode', default=False)
+		verbosity.add_option('-s', '--simulate',
+				action='store_true', dest='simulate', help='do not download video', default=False)
+		verbosity.add_option('-g', '--get-url',
+				action='store_true', dest='geturl', help='simulate, quiet but print URL', default=False)
+		verbosity.add_option('-e', '--get-title',
+				action='store_true', dest='gettitle', help='simulate, quiet but print title', default=False)
+		parser.add_option_group(verbosity)
+
+		filesystem = optparse.OptionGroup(parser, 'Filesystem Options')
+		filesystem.add_option('-t', '--title',
+				action='store_true', dest='usetitle', help='use title in file name', default=False)
+		filesystem.add_option('-l', '--literal',
+				action='store_true', dest='useliteral', help='use literal title in file name', default=False)
+		filesystem.add_option('-o', '--output',
+				dest='outtmpl', metavar='TPL', help='output filename template')
+		filesystem.add_option('-a', '--batch-file',
 				dest='batchfile', metavar='F', help='file containing URLs to download')
-		parser.add_option('-w', '--no-overwrites',
+		filesystem.add_option('-w', '--no-overwrites',
 				action='store_true', dest='nooverwrites', help='do not overwrite files', default=False)
+		filesystem.add_option('-c', '--continue',
+				action='store_true', dest='continue_dl', help='resume partially downloaded files', default=False)
+		parser.add_option_group(filesystem)
+
 		(opts, args) = parser.parse_args()
 
 		# Batch file verification
 		batchurls = []
 		if opts.batchfile is not None:
 			try:
-				batchurls = [line.strip() for line in open(opts.batchfile, 'r')]
+				batchurls = open(opts.batchfile, 'r').readlines()
+				batchurls = [x.strip() for x in batchurls]
+				batchurls = [x for x in batchurls if len(x) > 0]
 			except IOError:
 				sys.exit(u'ERROR: batch file could not be read')
 		all_urls = batchurls + args
 
 		# Conflicting, missing and erroneous options
 		if len(all_urls) < 1:
-			sys.exit(u'ERROR: you must provide at least one URL')
+			parser.error(u'you must provide at least one URL')
 		if opts.usenetrc and (opts.username is not None or opts.password is not None):
-			sys.exit(u'ERROR: using .netrc conflicts with giving username/password')
+			parser.error(u'using .netrc conflicts with giving username/password')
 		if opts.password is not None and opts.username is None:
-			sys.exit(u'ERROR: account username missing')
+			parser.error(u'account username missing')
 		if opts.outtmpl is not None and (opts.useliteral or opts.usetitle):
-			sys.exit(u'ERROR: using output template conflicts with using title or literal title')
+			parser.error(u'using output template conflicts with using title or literal title')
 		if opts.usetitle and opts.useliteral:
-			sys.exit(u'ERROR: using title conflicts with using literal title')
+			parser.error(u'using title conflicts with using literal title')
 		if opts.username is not None and opts.password is None:
 			opts.password = getpass.getpass(u'Type account password and press return:')
 		if opts.ratelimit is not None:
 			numeric_limit = FileDownloader.parse_bytes(opts.ratelimit)
 			if numeric_limit is None:
-				sys.exit(u'ERROR: invalid rate limit specified')
+				parser.error(u'invalid rate limit specified')
 			opts.ratelimit = numeric_limit
 
 		# Information extractors
@@ -1037,13 +1204,14 @@ if __name__ == '__main__':
 			'forcetitle': opts.gettitle,
 			'simulate': (opts.simulate or opts.geturl or opts.gettitle),
 			'format': opts.format,
-			'outtmpl': ((opts.outtmpl is not None and opts.outtmpl.decode(locale.getpreferredencoding()))
+			'outtmpl': ((opts.outtmpl is not None and opts.outtmpl.decode(preferredencoding()))
 				or (opts.usetitle and u'%(stitle)s-%(id)s.%(ext)s')
 				or (opts.useliteral and u'%(title)s-%(id)s.%(ext)s')
 				or u'%(id)s.%(ext)s'),
 			'ignoreerrors': opts.ignoreerrors,
 			'ratelimit': opts.ratelimit,
 			'nooverwrites': opts.nooverwrites,
+			'continuedl': opts.continue_dl,
 			})
 		fd.add_info_extractor(youtube_search_ie)
 		fd.add_info_extractor(youtube_pl_ie)