]> Raphaël G. Git Repositories - youtubedl/blobdiff - youtube_dl/__init__.py
debian/control: Add recommends on aria2 | wget | curl to use external downloaders.
[youtubedl] / youtube_dl / __init__.py
index 86951840dedf44c61298224fb6d789a5739ed91d..e90679ff974e6464885284733edf96ab4aca09b9 100644 (file)
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
-__authors__  = (
-       'Ricardo Garcia Gonzalez',
-       'Danny Colligan',
-       'Benjamin Johnson',
-       'Vasyl\' Vavrychuk',
-       'Witold Baryluk',
-       'Paweł Paprota',
-       'Gergely Imreh',
-       'Rogério Brito',
-       'Philipp Hagemeister',
-       'Sören Schulze',
-       'Kevin Ngo',
-       'Ori Avtalion',
-       'shizeeg',
-       'Filippo Valsorda',
-       )
+from __future__ import unicode_literals
 
 __license__ = 'Public Domain'
-__version__ = '2012.02.27'
 
-UPDATE_URL = 'https://raw.github.com/rg3/youtube-dl/master/youtube-dl'
-UPDATE_URL_VERSION = 'https://raw.github.com/rg3/youtube-dl/master/LATEST_VERSION'
-UPDATE_URL_EXE = 'https://raw.github.com/rg3/youtube-dl/master/youtube-dl.exe'
-
-
-import cookielib
-import getpass
-import optparse
+import codecs
+import io
 import os
-import re
-import shlex
-import socket
-import subprocess
+import random
 import sys
-import urllib2
-import warnings
-
-from utils import *
-from FileDownloader import *
-from InfoExtractors import *
-from PostProcessor import *
-
-def updateSelf(downloader, filename):
-       ''' Update the program file with the latest version from the repository '''
-       # Note: downloader only used for options
-       
-       if not os.access(filename, os.W_OK):
-               sys.exit('ERROR: no write permissions on %s' % filename)
-
-       downloader.to_screen(u'Updating to latest version...')
-
-       urlv = urllib2.urlopen(UPDATE_URL_VERSION)
-       newversion = urlv.read().strip()
-       if newversion == __version__:
-               downloader.to_screen(u'youtube-dl is up-to-date (' + __version__ + ')')
-               return
-       urlv.close()
-
-       if hasattr(sys, "frozen"): #py2exe
-               exe = os.path.abspath(filename)
-               directory = os.path.dirname(exe)
-               if not os.access(directory, os.W_OK):
-                       sys.exit('ERROR: no write permissions on %s' % directory)
-                       
-               try:
-                       urlh = urllib2.urlopen(UPDATE_URL_EXE)
-                       newcontent = urlh.read()
-                       urlh.close()
-                       with open(exe + '.new', 'wb') as outf:
-                               outf.write(newcontent)
-               except (IOError, OSError), err:
-                       sys.exit('ERROR: unable to download latest version')
-                       
-               try:
-                       bat = os.path.join(directory, 'youtube-dl-updater.bat')
-                       b = open(bat, 'w')
-                       
-                       print >> b, """
-echo Updating youtube-dl...
-ping 127.0.0.1 -n 5 -w 1000 > NUL
-move /Y "%s.new" "%s"
-del "%s"
-                       """ %(exe, exe, bat)
-                       
-                       b.close()
-                       
-                       os.startfile(bat)
-               except (IOError, OSError), err:
-                       sys.exit('ERROR: unable to overwrite current version')
-
-       else:
-               try:
-                       urlh = urllib2.urlopen(UPDATE_URL)
-                       newcontent = urlh.read()
-                       urlh.close()
-               except (IOError, OSError), err:
-                       sys.exit('ERROR: unable to download latest version')
-
-               try:
-                       with open(filename, 'wb') as outf:
-                               outf.write(newcontent)
-               except (IOError, OSError), err:
-                       sys.exit('ERROR: unable to overwrite current version')
-
-       downloader.to_screen(u'Updated youtube-dl. Restart youtube-dl to use the new version.')
-
-def parseOpts():
-       def _readOptions(filename_bytes):
-               try:
-                       optionf = open(filename_bytes)
-               except IOError:
-                       return [] # silently skip if file is not present
-               try:
-                       res = []
-                       for l in optionf:
-                               res += shlex.split(l, comments=True)
-               finally:
-                       optionf.close()
-               return res
-
-       def _format_option_string(option):
-               ''' ('-o', '--option') -> -o, --format METAVAR'''
-
-               opts = []
-
-               if option._short_opts: opts.append(option._short_opts[0])
-               if option._long_opts: opts.append(option._long_opts[0])
-               if len(opts) > 1: opts.insert(1, ', ')
-
-               if option.takes_value(): opts.append(' %s' % option.metavar)
-
-               return "".join(opts)
-
-       def _find_term_columns():
-               columns = os.environ.get('COLUMNS', None)
-               if columns:
-                       return int(columns)
-
-               try:
-                       sp = subprocess.Popen(['stty', 'size'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
-                       out,err = sp.communicate()
-                       return int(out.split()[1])
-               except:
-                       pass
-               return None
-
-       max_width = 80
-       max_help_position = 80
-
-       # No need to wrap help messages if we're on a wide console
-       columns = _find_term_columns()
-       if columns: max_width = columns
-
-       fmt = optparse.IndentedHelpFormatter(width=max_width, max_help_position=max_help_position)
-       fmt.format_option_strings = _format_option_string
-
-       kw = {
-               'version'   : __version__,
-               'formatter' : fmt,
-               'usage' : '%prog [options] url [url...]',
-               'conflict_handler' : 'resolve',
-       }
-
-       parser = optparse.OptionParser(**kw)
-
-       # option groups
-       general        = optparse.OptionGroup(parser, 'General Options')
-       selection      = optparse.OptionGroup(parser, 'Video Selection')
-       authentication = optparse.OptionGroup(parser, 'Authentication Options')
-       video_format   = optparse.OptionGroup(parser, 'Video Format Options')
-       postproc       = optparse.OptionGroup(parser, 'Post-processing Options')
-       filesystem     = optparse.OptionGroup(parser, 'Filesystem Options')
-       verbosity      = optparse.OptionGroup(parser, 'Verbosity / Simulation Options')
-
-       general.add_option('-h', '--help',
-                       action='help', help='print this help text and exit')
-       general.add_option('-v', '--version',
-                       action='version', help='print program version and exit')
-       general.add_option('-U', '--update',
-                       action='store_true', dest='update_self', help='update this program to latest version')
-       general.add_option('-i', '--ignore-errors',
-                       action='store_true', dest='ignoreerrors', help='continue on download errors', default=False)
-       general.add_option('-r', '--rate-limit',
-                       dest='ratelimit', metavar='LIMIT', help='download rate limit (e.g. 50k or 44.6m)')
-       general.add_option('-R', '--retries',
-                       dest='retries', metavar='RETRIES', help='number of retries (default is 10)', default=10)
-       general.add_option('--dump-user-agent',
-                       action='store_true', dest='dump_user_agent',
-                       help='display the current browser identification', default=False)
-       general.add_option('--list-extractors',
-                       action='store_true', dest='list_extractors',
-                       help='List all supported extractors and the URLs they would handle', default=False)
-
-       selection.add_option('--playlist-start',
-                       dest='playliststart', metavar='NUMBER', help='playlist video to start at (default is 1)', default=1)
-       selection.add_option('--playlist-end',
-                       dest='playlistend', metavar='NUMBER', help='playlist video to end at (default is last)', default=-1)
-       selection.add_option('--match-title', dest='matchtitle', metavar='REGEX',help='download only matching titles (regex or caseless sub-string)')
-       selection.add_option('--reject-title', dest='rejecttitle', metavar='REGEX',help='skip download for matching titles (regex or caseless sub-string)')
-       selection.add_option('--max-downloads', metavar='NUMBER', dest='max_downloads', help='Abort after downloading NUMBER files', default=None)
-
-       authentication.add_option('-u', '--username',
-                       dest='username', metavar='USERNAME', help='account username')
-       authentication.add_option('-p', '--password',
-                       dest='password', metavar='PASSWORD', help='account password')
-       authentication.add_option('-n', '--netrc',
-                       action='store_true', dest='usenetrc', help='use .netrc authentication data', default=False)
-
-
-       video_format.add_option('-f', '--format',
-                       action='store', dest='format', metavar='FORMAT', help='video format code')
-       video_format.add_option('--all-formats',
-                       action='store_const', dest='format', help='download all available video formats', const='all')
-       video_format.add_option('--prefer-free-formats',
-                       action='store_true', dest='prefer_free_formats', default=False, help='prefer free video formats unless a specific one is requested')
-       video_format.add_option('--max-quality',
-                       action='store', dest='format_limit', metavar='FORMAT', help='highest quality format to download')
-       video_format.add_option('-F', '--list-formats',
-                       action='store_true', dest='listformats', help='list all available formats (currently youtube only)')
-       video_format.add_option('--write-srt',
-                       action='store_true', dest='writesubtitles',
-                       help='write video closed captions to a .srt file (currently youtube only)', default=False)
-       video_format.add_option('--srt-lang',
-                       action='store', dest='subtitleslang', metavar='LANG',
-                       help='language of the closed captions to download (optional) use IETF language tags like \'en\'')
-
-
-       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 the video and do not write anything to disk', default=False)
-       verbosity.add_option('--skip-download',
-                       action='store_true', dest='skip_download', help='do not download the 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)
-       verbosity.add_option('--get-thumbnail',
-                       action='store_true', dest='getthumbnail',
-                       help='simulate, quiet but print thumbnail URL', default=False)
-       verbosity.add_option('--get-description',
-                       action='store_true', dest='getdescription',
-                       help='simulate, quiet but print video description', default=False)
-       verbosity.add_option('--get-filename',
-                       action='store_true', dest='getfilename',
-                       help='simulate, quiet but print output filename', default=False)
-       verbosity.add_option('--get-format',
-                       action='store_true', dest='getformat',
-                       help='simulate, quiet but print output format', default=False)
-       verbosity.add_option('--no-progress',
-                       action='store_true', dest='noprogress', help='do not print progress bar', default=False)
-       verbosity.add_option('--console-title',
-                       action='store_true', dest='consoletitle',
-                       help='display progress in console titlebar', default=False)
-       verbosity.add_option('-v', '--verbose',
-                       action='store_true', dest='verbose', help='print various debugging information', default=False)
-
-
-       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('-A', '--auto-number',
-                       action='store_true', dest='autonumber',
-                       help='number downloaded files starting from 00000', default=False)
-       filesystem.add_option('-o', '--output',
-                       dest='outtmpl', metavar='TEMPLATE', help='output filename template. Use %(stitle)s to get the title, %(uploader)s for the uploader name, %(autonumber)s to get an automatically incremented number, %(ext)s for the filename extension, %(upload_date)s for the upload date (YYYYMMDD), and %% for a literal percent. Use - to output to stdout.')
-       filesystem.add_option('-a', '--batch-file',
-                       dest='batchfile', metavar='FILE', help='file containing URLs to download (\'-\' for stdin)')
-       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=True)
-       filesystem.add_option('--no-continue',
-                       action='store_false', dest='continue_dl',
-                       help='do not resume partially downloaded files (restart from beginning)')
-       filesystem.add_option('--cookies',
-                       dest='cookiefile', metavar='FILE', help='file to read cookies from and dump cookie jar in')
-       filesystem.add_option('--no-part',
-                       action='store_true', dest='nopart', help='do not use .part files', default=False)
-       filesystem.add_option('--no-mtime',
-                       action='store_false', dest='updatetime',
-                       help='do not use the Last-modified header to set the file modification time', default=True)
-       filesystem.add_option('--write-description',
-                       action='store_true', dest='writedescription',
-                       help='write video description to a .description file', default=False)
-       filesystem.add_option('--write-info-json',
-                       action='store_true', dest='writeinfojson',
-                       help='write video metadata to a .info.json file', default=False)
-
-
-       postproc.add_option('--extract-audio', action='store_true', dest='extractaudio', default=False,
-                       help='convert video files to audio-only files (requires ffmpeg or avconv and ffprobe or avprobe)')
-       postproc.add_option('--audio-format', metavar='FORMAT', dest='audioformat', default='best',
-                       help='"best", "aac", "vorbis", "mp3", "m4a", or "wav"; best by default')
-       postproc.add_option('--audio-quality', metavar='QUALITY', dest='audioquality', default='128K',
-                       help='ffmpeg/avconv audio bitrate specification, 128k by default')
-       postproc.add_option('-k', '--keep-video', action='store_true', dest='keepvideo', default=False,
-                       help='keeps the video file on disk after the post-processing; the video is erased by default')
-
-
-       parser.add_option_group(general)
-       parser.add_option_group(selection)
-       parser.add_option_group(filesystem)
-       parser.add_option_group(verbosity)
-       parser.add_option_group(video_format)
-       parser.add_option_group(authentication)
-       parser.add_option_group(postproc)
-
-       xdg_config_home = os.environ.get('XDG_CONFIG_HOME')
-       if xdg_config_home:
-               userConf = os.path.join(xdg_config_home, 'youtube-dl.conf')
-       else:
-               userConf = os.path.join(os.path.expanduser('~'), '.config', 'youtube-dl.conf')
-       argv = _readOptions('/etc/youtube-dl.conf') + _readOptions(userConf) + sys.argv[1:]
-       opts, args = parser.parse_args(argv)
-
-       return parser, opts, args
-
-def gen_extractors():
-       """ Return a list of an instance of every supported extractor.
-       The order does matter; the first extractor matched is the one handling the URL.
-       """
-       return [
-               YoutubePlaylistIE(),
-               YoutubeUserIE(),
-               YoutubeSearchIE(),
-               YoutubeIE(),
-               MetacafeIE(),
-               DailymotionIE(),
-               GoogleIE(),
-               GoogleSearchIE(),
-               PhotobucketIE(),
-               YahooIE(),
-               YahooSearchIE(),
-               DepositFilesIE(),
-               FacebookIE(),
-               BlipTVUserIE(),
-               BlipTVIE(),
-               VimeoIE(),
-               MyVideoIE(),
-               ComedyCentralIE(),
-               EscapistIE(),
-               CollegeHumorIE(),
-               XVideosIE(),
-               SoundcloudIE(),
-               InfoQIE(),
-               MixcloudIE(),
-               StanfordOpenClassroomIE(),
-               MTVIE(),
-
-               GenericIE()
-       ]
-
-def _real_main():
-       parser, opts, args = parseOpts()
-
-       # Open appropriate CookieJar
-       if opts.cookiefile is None:
-               jar = cookielib.CookieJar()
-       else:
-               try:
-                       jar = cookielib.MozillaCookieJar(opts.cookiefile)
-                       if os.path.isfile(opts.cookiefile) and os.access(opts.cookiefile, os.R_OK):
-                               jar.load()
-               except (IOError, OSError), err:
-                       sys.exit(u'ERROR: unable to open cookie file')
-
-       # Dump user agent
-       if opts.dump_user_agent:
-               print std_headers['User-Agent']
-               sys.exit(0)
-
-       # Batch file verification
-       batchurls = []
-       if opts.batchfile is not None:
-               try:
-                       if opts.batchfile == '-':
-                               batchfd = sys.stdin
-                       else:
-                               batchfd = open(opts.batchfile, 'r')
-                       batchurls = batchfd.readlines()
-                       batchurls = [x.strip() for x in batchurls]
-                       batchurls = [x for x in batchurls if len(x) > 0 and not re.search(r'^[#/;]', x)]
-               except IOError:
-                       sys.exit(u'ERROR: batch file could not be read')
-       all_urls = batchurls + args
-       all_urls = map(lambda url: url.strip(), all_urls)
-
-       # General configuration
-       cookie_processor = urllib2.HTTPCookieProcessor(jar)
-       proxy_handler = urllib2.ProxyHandler()
-       opener = urllib2.build_opener(proxy_handler, cookie_processor, YoutubeDLHandler())
-       urllib2.install_opener(opener)
-       socket.setdefaulttimeout(300) # 5 minutes should be enough (famous last words)
-
-       extractors = gen_extractors()
-
-       if opts.list_extractors:
-               for ie in extractors:
-                       print(ie.IE_NAME)
-                       matchedUrls = filter(lambda url: ie.suitable(url), all_urls)
-                       all_urls = filter(lambda url: url not in matchedUrls, all_urls)
-                       for mu in matchedUrls:
-                               print(u'  ' + mu)
-               sys.exit(0)
-
-       # Conflicting, missing and erroneous options
-       if opts.usenetrc and (opts.username is not None or opts.password is not None):
-               parser.error(u'using .netrc conflicts with giving username/password')
-       if opts.password is not None and opts.username is None:
-               parser.error(u'account username missing')
-       if opts.outtmpl is not None and (opts.useliteral or opts.usetitle or opts.autonumber):
-               parser.error(u'using output template conflicts with using title, literal title or auto number')
-       if opts.usetitle and opts.useliteral:
-               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:
-                       parser.error(u'invalid rate limit specified')
-               opts.ratelimit = numeric_limit
-       if opts.retries is not None:
-               try:
-                       opts.retries = long(opts.retries)
-               except (TypeError, ValueError), err:
-                       parser.error(u'invalid retry count specified')
-       try:
-               opts.playliststart = int(opts.playliststart)
-               if opts.playliststart <= 0:
-                       raise ValueError(u'Playlist start must be positive')
-       except (TypeError, ValueError), err:
-               parser.error(u'invalid playlist start number specified')
-       try:
-               opts.playlistend = int(opts.playlistend)
-               if opts.playlistend != -1 and (opts.playlistend <= 0 or opts.playlistend < opts.playliststart):
-                       raise ValueError(u'Playlist end must be greater than playlist start')
-       except (TypeError, ValueError), err:
-               parser.error(u'invalid playlist end number specified')
-       if opts.extractaudio:
-               if opts.audioformat not in ['best', 'aac', 'mp3', 'vorbis', 'm4a', 'wav']:
-                       parser.error(u'invalid audio format specified')
-
-       # File downloader
-       fd = FileDownloader({
-               'usenetrc': opts.usenetrc,
-               'username': opts.username,
-               'password': opts.password,
-               'quiet': (opts.quiet or opts.geturl or opts.gettitle or opts.getthumbnail or opts.getdescription or opts.getfilename or opts.getformat),
-               'forceurl': opts.geturl,
-               'forcetitle': opts.gettitle,
-               'forcethumbnail': opts.getthumbnail,
-               'forcedescription': opts.getdescription,
-               'forcefilename': opts.getfilename,
-               'forceformat': opts.getformat,
-               'simulate': opts.simulate,
-               'skip_download': (opts.skip_download or opts.simulate or opts.geturl or opts.gettitle or opts.getthumbnail or opts.getdescription or opts.getfilename or opts.getformat),
-               'format': opts.format,
-               'format_limit': opts.format_limit,
-               'listformats': opts.listformats,
-               'outtmpl': ((opts.outtmpl is not None and opts.outtmpl.decode(preferredencoding()))
-                       or (opts.format == '-1' and opts.usetitle and u'%(stitle)s-%(id)s-%(format)s.%(ext)s')
-                       or (opts.format == '-1' and opts.useliteral and u'%(title)s-%(id)s-%(format)s.%(ext)s')
-                       or (opts.format == '-1' and u'%(id)s-%(format)s.%(ext)s')
-                       or (opts.usetitle and opts.autonumber and u'%(autonumber)s-%(stitle)s-%(id)s.%(ext)s')
-                       or (opts.useliteral and opts.autonumber and u'%(autonumber)s-%(title)s-%(id)s.%(ext)s')
-                       or (opts.usetitle and u'%(stitle)s-%(id)s.%(ext)s')
-                       or (opts.useliteral and u'%(title)s-%(id)s.%(ext)s')
-                       or (opts.autonumber and u'%(autonumber)s-%(id)s.%(ext)s')
-                       or u'%(id)s.%(ext)s'),
-               'ignoreerrors': opts.ignoreerrors,
-               'ratelimit': opts.ratelimit,
-               'nooverwrites': opts.nooverwrites,
-               'retries': opts.retries,
-               'continuedl': opts.continue_dl,
-               'noprogress': opts.noprogress,
-               'playliststart': opts.playliststart,
-               'playlistend': opts.playlistend,
-               'logtostderr': opts.outtmpl == '-',
-               'consoletitle': opts.consoletitle,
-               'nopart': opts.nopart,
-               'updatetime': opts.updatetime,
-               'writedescription': opts.writedescription,
-               'writeinfojson': opts.writeinfojson,
-               'writesubtitles': opts.writesubtitles,
-               'subtitleslang': opts.subtitleslang,
-               'matchtitle': opts.matchtitle,
-               'rejecttitle': opts.rejecttitle,
-               'max_downloads': opts.max_downloads,
-               'prefer_free_formats': opts.prefer_free_formats,
-               'verbose': opts.verbose,
-               })
-
-       if opts.verbose:
-               fd.to_screen(u'[debug] Proxy map: ' + str(proxy_handler.proxies))
-
-       for extractor in extractors:
-               fd.add_info_extractor(extractor)
-
-       # PostProcessors
-       if opts.extractaudio:
-               fd.add_post_processor(FFmpegExtractAudioPP(preferredcodec=opts.audioformat, preferredquality=opts.audioquality, keepvideo=opts.keepvideo))
-
-       # Update version
-       if opts.update_self:
-               updateSelf(fd, sys.argv[0])
-
-       # Maybe do nothing
-       if len(all_urls) < 1:
-               if not opts.update_self:
-                       parser.error(u'you must provide at least one URL')
-               else:
-                       sys.exit()
-       
-       try:
-               retcode = fd.download(all_urls)
-       except MaxDownloadsReached:
-               fd.to_screen(u'--max-download limit reached, aborting.')
-               retcode = 101
-
-       # Dump cookie jar if requested
-       if opts.cookiefile is not None:
-               try:
-                       jar.save()
-               except (IOError, OSError), err:
-                       sys.exit(u'ERROR: unable to save cookie jar')
-
-       sys.exit(retcode)
-
-def main():
-       try:
-               _real_main()
-       except DownloadError:
-               sys.exit(1)
-       except SameFileError:
-               sys.exit(u'ERROR: fixed output name but more than one file to download')
-       except KeyboardInterrupt:
-               sys.exit(u'\nERROR: Interrupted by user')
+
+
+from .options import (
+    parseOpts,
+)
+from .compat import (
+    compat_expanduser,
+    compat_getpass,
+    compat_print,
+    workaround_optparse_bug9161,
+)
+from .utils import (
+    DateRange,
+    DEFAULT_OUTTMPL,
+    decodeOption,
+    DownloadError,
+    MaxDownloadsReached,
+    preferredencoding,
+    read_batch_urls,
+    SameFileError,
+    setproctitle,
+    std_headers,
+    write_string,
+)
+from .update import update_self
+from .downloader import (
+    FileDownloader,
+)
+from .extractor import gen_extractors, list_extractors
+from .YoutubeDL import YoutubeDL
+
+
+def _real_main(argv=None):
+    # Compatibility fixes for Windows
+    if sys.platform == 'win32':
+        # https://github.com/rg3/youtube-dl/issues/820
+        codecs.register(lambda name: codecs.lookup('utf-8') if name == 'cp65001' else None)
+
+    workaround_optparse_bug9161()
+
+    setproctitle('youtube-dl')
+
+    parser, opts, args = parseOpts(argv)
+
+    # Set user agent
+    if opts.user_agent is not None:
+        std_headers['User-Agent'] = opts.user_agent
+
+    # Set referer
+    if opts.referer is not None:
+        std_headers['Referer'] = opts.referer
+
+    # Custom HTTP headers
+    if opts.headers is not None:
+        for h in opts.headers:
+            if h.find(':', 1) < 0:
+                parser.error('wrong header formatting, it should be key:value, not "%s"' % h)
+            key, value = h.split(':', 2)
+            if opts.verbose:
+                write_string('[debug] Adding header from command line option %s:%s\n' % (key, value))
+            std_headers[key] = value
+
+    # Dump user agent
+    if opts.dump_user_agent:
+        compat_print(std_headers['User-Agent'])
+        sys.exit(0)
+
+    # Batch file verification
+    batch_urls = []
+    if opts.batchfile is not None:
+        try:
+            if opts.batchfile == '-':
+                batchfd = sys.stdin
+            else:
+                batchfd = io.open(opts.batchfile, 'r', encoding='utf-8', errors='ignore')
+            batch_urls = read_batch_urls(batchfd)
+            if opts.verbose:
+                write_string('[debug] Batch file urls: ' + repr(batch_urls) + '\n')
+        except IOError:
+            sys.exit('ERROR: batch file could not be read')
+    all_urls = batch_urls + args
+    all_urls = [url.strip() for url in all_urls]
+    _enc = preferredencoding()
+    all_urls = [url.decode(_enc, 'ignore') if isinstance(url, bytes) else url for url in all_urls]
+
+    if opts.list_extractors:
+        for ie in list_extractors(opts.age_limit):
+            compat_print(ie.IE_NAME + (' (CURRENTLY BROKEN)' if not ie._WORKING else ''))
+            matchedUrls = [url for url in all_urls if ie.suitable(url)]
+            for mu in matchedUrls:
+                compat_print('  ' + mu)
+        sys.exit(0)
+    if opts.list_extractor_descriptions:
+        for ie in list_extractors(opts.age_limit):
+            if not ie._WORKING:
+                continue
+            desc = getattr(ie, 'IE_DESC', ie.IE_NAME)
+            if desc is False:
+                continue
+            if hasattr(ie, 'SEARCH_KEY'):
+                _SEARCHES = ('cute kittens', 'slithering pythons', 'falling cat', 'angry poodle', 'purple fish', 'running tortoise', 'sleeping bunny', 'burping cow')
+                _COUNTS = ('', '5', '10', 'all')
+                desc += ' (Example: "%s%s:%s" )' % (ie.SEARCH_KEY, random.choice(_COUNTS), random.choice(_SEARCHES))
+            compat_print(desc)
+        sys.exit(0)
+
+    # Conflicting, missing and erroneous options
+    if opts.usenetrc and (opts.username is not None or opts.password is not None):
+        parser.error('using .netrc conflicts with giving username/password')
+    if opts.password is not None and opts.username is None:
+        parser.error('account username missing\n')
+    if opts.outtmpl is not None and (opts.usetitle or opts.autonumber or opts.useid):
+        parser.error('using output template conflicts with using title, video ID or auto number')
+    if opts.usetitle and opts.useid:
+        parser.error('using title conflicts with using video ID')
+    if opts.username is not None and opts.password is None:
+        opts.password = compat_getpass('Type account password and press [Return]: ')
+    if opts.ratelimit is not None:
+        numeric_limit = FileDownloader.parse_bytes(opts.ratelimit)
+        if numeric_limit is None:
+            parser.error('invalid rate limit specified')
+        opts.ratelimit = numeric_limit
+    if opts.min_filesize is not None:
+        numeric_limit = FileDownloader.parse_bytes(opts.min_filesize)
+        if numeric_limit is None:
+            parser.error('invalid min_filesize specified')
+        opts.min_filesize = numeric_limit
+    if opts.max_filesize is not None:
+        numeric_limit = FileDownloader.parse_bytes(opts.max_filesize)
+        if numeric_limit is None:
+            parser.error('invalid max_filesize specified')
+        opts.max_filesize = numeric_limit
+    if opts.retries is not None:
+        if opts.retries in ('inf', 'infinite'):
+            opts_retries = float('inf')
+        else:
+            try:
+                opts_retries = int(opts.retries)
+            except (TypeError, ValueError):
+                parser.error('invalid retry count specified')
+    if opts.buffersize is not None:
+        numeric_buffersize = FileDownloader.parse_bytes(opts.buffersize)
+        if numeric_buffersize is None:
+            parser.error('invalid buffer size specified')
+        opts.buffersize = numeric_buffersize
+    if opts.playliststart <= 0:
+        raise ValueError('Playlist start must be positive')
+    if opts.playlistend not in (-1, None) and opts.playlistend < opts.playliststart:
+        raise ValueError('Playlist end must be greater than playlist start')
+    if opts.extractaudio:
+        if opts.audioformat not in ['best', 'aac', 'mp3', 'm4a', 'opus', 'vorbis', 'wav']:
+            parser.error('invalid audio format specified')
+    if opts.audioquality:
+        opts.audioquality = opts.audioquality.strip('k').strip('K')
+        if not opts.audioquality.isdigit():
+            parser.error('invalid audio quality specified')
+    if opts.recodevideo is not None:
+        if opts.recodevideo not in ['mp4', 'flv', 'webm', 'ogg', 'mkv']:
+            parser.error('invalid video recode format specified')
+
+    if opts.date is not None:
+        date = DateRange.day(opts.date)
+    else:
+        date = DateRange(opts.dateafter, opts.datebefore)
+
+    # Do not download videos when there are audio-only formats
+    if opts.extractaudio and not opts.keepvideo and opts.format is None:
+        opts.format = 'bestaudio/best'
+
+    # --all-sub automatically sets --write-sub if --write-auto-sub is not given
+    # this was the old behaviour if only --all-sub was given.
+    if opts.allsubtitles and not opts.writeautomaticsub:
+        opts.writesubtitles = True
+
+    if sys.version_info < (3,):
+        # In Python 2, sys.argv is a bytestring (also note http://bugs.python.org/issue2128 for Windows systems)
+        if opts.outtmpl is not None:
+            opts.outtmpl = opts.outtmpl.decode(preferredencoding())
+    outtmpl = ((opts.outtmpl is not None and opts.outtmpl)
+               or (opts.format == '-1' and opts.usetitle and '%(title)s-%(id)s-%(format)s.%(ext)s')
+               or (opts.format == '-1' and '%(id)s-%(format)s.%(ext)s')
+               or (opts.usetitle and opts.autonumber and '%(autonumber)s-%(title)s-%(id)s.%(ext)s')
+               or (opts.usetitle and '%(title)s-%(id)s.%(ext)s')
+               or (opts.useid and '%(id)s.%(ext)s')
+               or (opts.autonumber and '%(autonumber)s-%(id)s.%(ext)s')
+               or DEFAULT_OUTTMPL)
+    if not os.path.splitext(outtmpl)[1] and opts.extractaudio:
+        parser.error('Cannot download a video and extract audio into the same'
+                     ' file! Use "{0}.%(ext)s" instead of "{0}" as the output'
+                     ' template'.format(outtmpl))
+
+    any_getting = opts.geturl or opts.gettitle or opts.getid or opts.getthumbnail or opts.getdescription or opts.getfilename or opts.getformat or opts.getduration or opts.dumpjson or opts.dump_single_json
+    any_printing = opts.print_json
+    download_archive_fn = compat_expanduser(opts.download_archive) if opts.download_archive is not None else opts.download_archive
+
+    # PostProcessors
+    postprocessors = []
+    # Add the metadata pp first, the other pps will copy it
+    if opts.addmetadata:
+        postprocessors.append({'key': 'FFmpegMetadata'})
+    if opts.extractaudio:
+        postprocessors.append({
+            'key': 'FFmpegExtractAudio',
+            'preferredcodec': opts.audioformat,
+            'preferredquality': opts.audioquality,
+            'nopostoverwrites': opts.nopostoverwrites,
+        })
+    if opts.recodevideo:
+        postprocessors.append({
+            'key': 'FFmpegVideoConvertor',
+            'preferedformat': opts.recodevideo,
+        })
+    if opts.embedsubtitles:
+        postprocessors.append({
+            'key': 'FFmpegEmbedSubtitle',
+            'subtitlesformat': opts.subtitlesformat,
+        })
+    if opts.xattrs:
+        postprocessors.append({'key': 'XAttrMetadata'})
+    if opts.embedthumbnail:
+        if not opts.addmetadata:
+            postprocessors.append({'key': 'FFmpegAudioFix'})
+        postprocessors.append({'key': 'AtomicParsley'})
+    # Please keep ExecAfterDownload towards the bottom as it allows the user to modify the final file in any way.
+    # So if the user is able to remove the file before your postprocessor runs it might cause a few problems.
+    if opts.exec_cmd:
+        postprocessors.append({
+            'key': 'ExecAfterDownload',
+            'verboseOutput': opts.verbose,
+            'exec_cmd': opts.exec_cmd,
+        })
+    if opts.xattr_set_filesize:
+        try:
+            import xattr
+            xattr  # Confuse flake8
+        except ImportError:
+            parser.error('setting filesize xattr requested but python-xattr is not available')
+
+    ydl_opts = {
+        'usenetrc': opts.usenetrc,
+        'username': opts.username,
+        'password': opts.password,
+        'twofactor': opts.twofactor,
+        'videopassword': opts.videopassword,
+        'quiet': (opts.quiet or any_getting or any_printing),
+        'no_warnings': opts.no_warnings,
+        'forceurl': opts.geturl,
+        'forcetitle': opts.gettitle,
+        'forceid': opts.getid,
+        'forcethumbnail': opts.getthumbnail,
+        'forcedescription': opts.getdescription,
+        'forceduration': opts.getduration,
+        'forcefilename': opts.getfilename,
+        'forceformat': opts.getformat,
+        'forcejson': opts.dumpjson or opts.print_json,
+        'dump_single_json': opts.dump_single_json,
+        'simulate': opts.simulate or any_getting,
+        'skip_download': opts.skip_download,
+        'format': opts.format,
+        'format_limit': opts.format_limit,
+        'listformats': opts.listformats,
+        'outtmpl': outtmpl,
+        'autonumber_size': opts.autonumber_size,
+        'restrictfilenames': opts.restrictfilenames,
+        'ignoreerrors': opts.ignoreerrors,
+        'ratelimit': opts.ratelimit,
+        'nooverwrites': opts.nooverwrites,
+        'retries': opts_retries,
+        'buffersize': opts.buffersize,
+        'noresizebuffer': opts.noresizebuffer,
+        'continuedl': opts.continue_dl,
+        'noprogress': opts.noprogress,
+        'progress_with_newline': opts.progress_with_newline,
+        'playliststart': opts.playliststart,
+        'playlistend': opts.playlistend,
+        'playlistreverse': opts.playlist_reverse,
+        'noplaylist': opts.noplaylist,
+        'logtostderr': opts.outtmpl == '-',
+        'consoletitle': opts.consoletitle,
+        'nopart': opts.nopart,
+        'updatetime': opts.updatetime,
+        'writedescription': opts.writedescription,
+        'writeannotations': opts.writeannotations,
+        'writeinfojson': opts.writeinfojson,
+        'writethumbnail': opts.writethumbnail,
+        'write_all_thumbnails': opts.write_all_thumbnails,
+        'writesubtitles': opts.writesubtitles,
+        'writeautomaticsub': opts.writeautomaticsub,
+        'allsubtitles': opts.allsubtitles,
+        'listsubtitles': opts.listsubtitles,
+        'subtitlesformat': opts.subtitlesformat,
+        'subtitleslangs': opts.subtitleslangs,
+        'matchtitle': decodeOption(opts.matchtitle),
+        'rejecttitle': decodeOption(opts.rejecttitle),
+        'max_downloads': opts.max_downloads,
+        'prefer_free_formats': opts.prefer_free_formats,
+        'verbose': opts.verbose,
+        'dump_intermediate_pages': opts.dump_intermediate_pages,
+        'write_pages': opts.write_pages,
+        'test': opts.test,
+        'keepvideo': opts.keepvideo,
+        'min_filesize': opts.min_filesize,
+        'max_filesize': opts.max_filesize,
+        'min_views': opts.min_views,
+        'max_views': opts.max_views,
+        'daterange': date,
+        'cachedir': opts.cachedir,
+        'youtube_print_sig_code': opts.youtube_print_sig_code,
+        'age_limit': opts.age_limit,
+        'download_archive': download_archive_fn,
+        'cookiefile': opts.cookiefile,
+        'nocheckcertificate': opts.no_check_certificate,
+        'prefer_insecure': opts.prefer_insecure,
+        'proxy': opts.proxy,
+        'socket_timeout': opts.socket_timeout,
+        'bidi_workaround': opts.bidi_workaround,
+        'debug_printtraffic': opts.debug_printtraffic,
+        'prefer_ffmpeg': opts.prefer_ffmpeg,
+        'include_ads': opts.include_ads,
+        'default_search': opts.default_search,
+        'youtube_include_dash_manifest': opts.youtube_include_dash_manifest,
+        'encoding': opts.encoding,
+        'exec_cmd': opts.exec_cmd,
+        'extract_flat': opts.extract_flat,
+        'merge_output_format': opts.merge_output_format,
+        'postprocessors': postprocessors,
+        'fixup': opts.fixup,
+        'source_address': opts.source_address,
+        'call_home': opts.call_home,
+        'sleep_interval': opts.sleep_interval,
+        'external_downloader': opts.external_downloader,
+        'list_thumbnails': opts.list_thumbnails,
+        'playlist_items': opts.playlist_items,
+        'xattr_set_filesize': opts.xattr_set_filesize,
+    }
+
+    with YoutubeDL(ydl_opts) as ydl:
+        # Update version
+        if opts.update_self:
+            update_self(ydl.to_screen, opts.verbose)
+
+        # Remove cache dir
+        if opts.rm_cachedir:
+            ydl.cache.remove()
+
+        # Maybe do nothing
+        if (len(all_urls) < 1) and (opts.load_info_filename is None):
+            if opts.update_self or opts.rm_cachedir:
+                sys.exit()
+
+            ydl.warn_if_short_id(sys.argv[1:] if argv is None else argv)
+            parser.error(
+                'You must provide at least one URL.\n'
+                'Type youtube-dl --help to see a list of all options.')
+
+        try:
+            if opts.load_info_filename is not None:
+                retcode = ydl.download_with_info_file(opts.load_info_filename)
+            else:
+                retcode = ydl.download(all_urls)
+        except MaxDownloadsReached:
+            ydl.to_screen('--max-download limit reached, aborting.')
+            retcode = 101
+
+    sys.exit(retcode)
+
+
+def main(argv=None):
+    try:
+        _real_main(argv)
+    except DownloadError:
+        sys.exit(1)
+    except SameFileError:
+        sys.exit('ERROR: fixed output name but more than one file to download')
+    except KeyboardInterrupt:
+        sys.exit('\nERROR: Interrupted by user')
+
+__all__ = ['main', 'YoutubeDL', 'gen_extractors', 'list_extractors']