zolfa
/
youtube-dl

# coding: utf-8
import collectionsimport errnoimport ioimport itertoolsimport jsonimport os.pathimport reimport stringimport structimport tracebackimport zlib
from .common import InfoExtractor, SearchInfoExtractorfrom .subtitles import SubtitlesInfoExtractorfrom ..utils import (    compat_chr,    compat_parse_qs,    compat_urllib_parse,    compat_urllib_request,    compat_urlparse,    compat_str,
    clean_html,    get_cachedir,    get_element_by_id,    get_element_by_attribute,    ExtractorError,    unescapeHTML,    unified_strdate,    orderedSet,    write_json_file,)
class YoutubeBaseInfoExtractor(InfoExtractor):    """Provide base functions for Youtube extractors"""    _LOGIN_URL = 'https://accounts.google.com/ServiceLogin'    _LANG_URL = r'https://www.youtube.com/?hl=en&persist_hl=1&gl=US&persist_gl=1&opt_out_ackd=1'    _AGE_URL = 'http://www.youtube.com/verify_age?next_url=/&gl=US&hl=en'    _NETRC_MACHINE = 'youtube'    # If True it will raise an error if no login info is provided    _LOGIN_REQUIRED = False
    def _set_language(self):        return bool(self._download_webpage(            self._LANG_URL, None,            note=u'Setting language', errnote='unable to set language',            fatal=False))
    def _login(self):        (username, password) = self._get_login_info()        # No authentication to be performed        if username is None:            if self._LOGIN_REQUIRED:                raise ExtractorError(u'No login info available, needed for using %s.' % self.IE_NAME, expected=True)            return False
        login_page = self._download_webpage(            self._LOGIN_URL, None,            note=u'Downloading login page',            errnote=u'unable to fetch login page', fatal=False)        if login_page is False:            return
        galx = self._search_regex(r'(?s)<input.+?name="GALX".+?value="(.+?)"',                                  login_page, u'Login GALX parameter')
        # Log in        login_form_strs = {                u'continue': u'https://www.youtube.com/signin?action_handle_signin=true&feature=sign_in_button&hl=en_US&nomobiletemp=1',                u'Email': username,                u'GALX': galx,                u'Passwd': password,                u'PersistentCookie': u'yes',                u'_utf8': u'霱',                u'bgresponse': u'js_disabled',                u'checkConnection': u'',                u'checkedDomains': u'youtube',                u'dnConn': u'',                u'pstMsg': u'0',                u'rmShown': u'1',                u'secTok': u'',                u'signIn': u'Sign in',                u'timeStmp': u'',                u'service': u'youtube',                u'uilel': u'3',                u'hl': u'en_US',        }        # Convert to UTF-8 *before* urlencode because Python 2.x's urlencode        # chokes on unicode        login_form = dict((k.encode('utf-8'), v.encode('utf-8')) for k,v in login_form_strs.items())        login_data = compat_urllib_parse.urlencode(login_form).encode('ascii')
        req = compat_urllib_request.Request(self._LOGIN_URL, login_data)        login_results = self._download_webpage(            req, None,            note=u'Logging in', errnote=u'unable to log in', fatal=False)        if login_results is False:            return False        if re.search(r'(?i)<form[^>]* id="gaia_loginform"', login_results) is not None:            self._downloader.report_warning(u'unable to log in: bad username or password')            return False        return True
    def _confirm_age(self):        age_form = {            'next_url': '/',            'action_confirm': 'Confirm',        }        req = compat_urllib_request.Request(self._AGE_URL, compat_urllib_parse.urlencode(age_form))
        self._download_webpage(            req, None,            note=u'Confirming age', errnote=u'Unable to confirm age')        return True
    def _real_initialize(self):        if self._downloader is None:            return        if not self._set_language():            return        if not self._login():            return        self._confirm_age()

class YoutubeIE(YoutubeBaseInfoExtractor, SubtitlesInfoExtractor):    IE_DESC = u'YouTube.com'    _VALID_URL = r"""(?x)^
                     (                         (?:https?://|//)?                                    # http(s):// or protocol-independent URL (optional)                         (?:(?:(?:(?:\w+\.)?[yY][oO][uU][tT][uU][bB][eE](?:-nocookie)?\.com/|                            tube\.majestyc\.net/|                            youtube\.googleapis\.com/)                        # the various hostnames, with wildcard subdomains                         (?:.*?\#/)?                                          # handle anchor (#/) redirect urls                         (?:                                                  # the various things that can precede the ID:                             (?:(?:v|embed|e)/)                               # v/ or embed/ or e/                             |(?:                                             # or the v= param in all its forms                                 (?:(?:watch|movie)(?:_popup)?(?:\.php)?)?    # preceding watch(_popup|.php) or nothing (like /?v=xxxx)                                 (?:\?|\#!?)                                  # the params delimiter ? or # or #!                                 (?:.*?&)?                                    # any other preceding param (like /?s=tuff&v=xxxx)                                 v=                             )                         ))                         |youtu\.be/                                          # just youtu.be/xxxx                         )                     )?                                                       # all until now is optional -> you can pass the naked ID                     ([0-9A-Za-z_-]{11})                                      # here is it! the YouTube video ID                     (?(1).+)?                                                # if we found the ID, everything can follow                     $"""
    _NEXT_URL_RE = r'[\?&]next_url=([^&]+)'    # Listed in order of quality    _available_formats = ['38', '37', '46', '22', '45', '35', '44', '34', '18', '43', '6', '5', '36', '17', '13',                          # Apple HTTP Live Streaming                          '96', '95', '94', '93', '92', '132', '151',                          # 3D                          '85', '84', '102', '83', '101', '82', '100',                          # Dash video                          '138', '137', '248', '136', '247', '135', '246',                          '245', '244', '134', '243', '133', '242', '160',                          # Dash audio                          '141', '172', '140', '171', '139',                          ]    _available_formats_prefer_free = ['38', '46', '37', '45', '22', '44', '35', '43', '34', '18', '6', '5', '36', '17', '13',                                      # Apple HTTP Live Streaming                                      '96', '95', '94', '93', '92', '132', '151',                                      # 3D                                      '85', '102', '84', '101', '83', '100', '82',                                      # Dash video                                      '138', '248', '137', '247', '136', '246', '245',                                      '244', '135', '243', '134', '242', '133', '160',                                      # Dash audio                                      '172', '141', '171', '140', '139',                                      ]    _video_formats_map = {        'flv': ['35', '34', '6', '5'],        '3gp': ['36', '17', '13'],        'mp4': ['38', '37', '22', '18'],        'webm': ['46', '45', '44', '43'],    }    _video_extensions = {        '13': '3gp',        '17': '3gp',        '18': 'mp4',        '22': 'mp4',        '36': '3gp',        '37': 'mp4',        '38': 'mp4',        '43': 'webm',        '44': 'webm',        '45': 'webm',        '46': 'webm',
        # 3d videos        '82': 'mp4',        '83': 'mp4',        '84': 'mp4',        '85': 'mp4',        '100': 'webm',        '101': 'webm',        '102': 'webm',
        # Apple HTTP Live Streaming        '92': 'mp4',        '93': 'mp4',        '94': 'mp4',        '95': 'mp4',        '96': 'mp4',        '132': 'mp4',        '151': 'mp4',
        # Dash mp4        '133': 'mp4',        '134': 'mp4',        '135': 'mp4',        '136': 'mp4',        '137': 'mp4',        '138': 'mp4',        '160': 'mp4',
        # Dash mp4 audio        '139': 'm4a',        '140': 'm4a',        '141': 'm4a',
        # Dash webm        '171': 'webm',        '172': 'webm',        '242': 'webm',        '243': 'webm',        '244': 'webm',        '245': 'webm',        '246': 'webm',        '247': 'webm',        '248': 'webm',    }    _video_dimensions = {        '5': '400x240',        '6': '???',        '13': '???',        '17': '176x144',        '18': '640x360',        '22': '1280x720',        '34': '640x360',        '35': '854x480',        '36': '320x240',        '37': '1920x1080',        '38': '4096x3072',        '43': '640x360',        '44': '854x480',        '45': '1280x720',        '46': '1920x1080',        '82': '360p',        '83': '480p',        '84': '720p',        '85': '1080p',        '92': '240p',        '93': '360p',        '94': '480p',        '95': '720p',        '96': '1080p',        '100': '360p',        '101': '480p',        '102': '720p',        '132': '240p',        '151': '72p',        '133': '240p',        '134': '360p',        '135': '480p',        '136': '720p',        '137': '1080p',        '138': '>1080p',        '139': '48k',        '140': '128k',        '141': '256k',        '160': '192p',        '171': '128k',        '172': '256k',        '242': '240p',        '243': '360p',        '244': '480p',        '245': '480p',        '246': '480p',        '247': '720p',        '248': '1080p',    }    _special_itags = {        '82': '3D',        '83': '3D',        '84': '3D',        '85': '3D',        '100': '3D',        '101': '3D',        '102': '3D',        '133': 'DASH Video',        '134': 'DASH Video',        '135': 'DASH Video',        '136': 'DASH Video',        '137': 'DASH Video',        '138': 'DASH Video',        '139': 'DASH Audio',        '140': 'DASH Audio',        '141': 'DASH Audio',        '160': 'DASH Video',        '171': 'DASH Audio',        '172': 'DASH Audio',        '242': 'DASH Video',        '243': 'DASH Video',        '244': 'DASH Video',        '245': 'DASH Video',        '246': 'DASH Video',        '247': 'DASH Video',        '248': 'DASH Video',    }
    IE_NAME = u'youtube'    _TESTS = [        {            u"url":  u"http://www.youtube.com/watch?v=BaW_jenozKc",            u"file":  u"BaW_jenozKc.mp4",            u"info_dict": {                u"title": u"youtube-dl test video \"'/\\ä↭𝕐",                u"uploader": u"Philipp Hagemeister",                u"uploader_id": u"phihag",                u"upload_date": u"20121002",                u"description": u"test chars:  \"'/\\ä↭𝕐\ntest URL: https://github.com/rg3/youtube-dl/issues/1892\n\nThis is a test video for youtube-dl.\n\nFor more information, contact phihag@phihag.de ."            }        },        {            u"url":  u"http://www.youtube.com/watch?v=UxxajLWwzqY",            u"file":  u"UxxajLWwzqY.mp4",            u"note": u"Test generic use_cipher_signature video (#897)",            u"info_dict": {                u"upload_date": u"20120506",                u"title": u"Icona Pop - I Love It (feat. Charli XCX) [OFFICIAL VIDEO]",                u"description": u"md5:5b292926389560516e384ac437c0ec07",                u"uploader": u"Icona Pop",                u"uploader_id": u"IconaPop"            }        },        {            u"url":  u"https://www.youtube.com/watch?v=07FYdnEawAQ",            u"file":  u"07FYdnEawAQ.mp4",            u"note": u"Test VEVO video with age protection (#956)",            u"info_dict": {                u"upload_date": u"20130703",                u"title": u"Justin Timberlake - Tunnel Vision (Explicit)",                u"description": u"md5:64249768eec3bc4276236606ea996373",                u"uploader": u"justintimberlakeVEVO",                u"uploader_id": u"justintimberlakeVEVO"            }        },        {            u"url":  u"//www.YouTube.com/watch?v=yZIXLfi8CZQ",            u"file":  u"yZIXLfi8CZQ.mp4",            u"note": u"Embed-only video (#1746)",            u"info_dict": {                u"upload_date": u"20120608",                u"title": u"Principal Sexually Assaults A Teacher - Episode 117 - 8th June 2012",                u"description": u"md5:09b78bd971f1e3e289601dfba15ca4f7",                u"uploader": u"SET India",                u"uploader_id": u"setindia"            }        },    ]

    @classmethod    def suitable(cls, url):        """Receives a URL and returns True if suitable for this IE."""        if YoutubePlaylistIE.suitable(url): return False        return re.match(cls._VALID_URL, url) is not None
    def __init__(self, *args, **kwargs):        super(YoutubeIE, self).__init__(*args, **kwargs)        self._player_cache = {}
    def report_video_info_webpage_download(self, video_id):        """Report attempt to download video info webpage."""        self.to_screen(u'%s: Downloading video info webpage' % video_id)
    def report_information_extraction(self, video_id):        """Report attempt to extract video information."""        self.to_screen(u'%s: Extracting video information' % video_id)
    def report_unavailable_format(self, video_id, format):        """Report extracted video URL."""        self.to_screen(u'%s: Format %s not available' % (video_id, format))
    def report_rtmp_download(self):        """Indicate the download will use the RTMP protocol."""        self.to_screen(u'RTMP download detected')
    def _extract_signature_function(self, video_id, player_url, slen):        id_m = re.match(r'.*-(?P<id>[a-zA-Z0-9_-]+)\.(?P<ext>[a-z]+)$',                        player_url)        player_type = id_m.group('ext')        player_id = id_m.group('id')
        # Read from filesystem cache        func_id = '%s_%s_%d' % (player_type, player_id, slen)        assert os.path.basename(func_id) == func_id        cache_dir = get_cachedir(self._downloader.params)
        cache_enabled = cache_dir is not None        if cache_enabled:            cache_fn = os.path.join(os.path.expanduser(cache_dir),                                    u'youtube-sigfuncs',                                    func_id + '.json')            try:                with io.open(cache_fn, 'r', encoding='utf-8') as cachef:                    cache_spec = json.load(cachef)                return lambda s: u''.join(s[i] for i in cache_spec)            except IOError:                pass  # No cache available
        if player_type == 'js':            code = self._download_webpage(                player_url, video_id,                note=u'Downloading %s player %s' % (player_type, player_id),                errnote=u'Download of %s failed' % player_url)            res = self._parse_sig_js(code)        elif player_type == 'swf':            urlh = self._request_webpage(                player_url, video_id,                note=u'Downloading %s player %s' % (player_type, player_id),                errnote=u'Download of %s failed' % player_url)            code = urlh.read()            res = self._parse_sig_swf(code)        else:            assert False, 'Invalid player type %r' % player_type
        if cache_enabled:            try:                test_string = u''.join(map(compat_chr, range(slen)))                cache_res = res(test_string)                cache_spec = [ord(c) for c in cache_res]                try:                    os.makedirs(os.path.dirname(cache_fn))                except OSError as ose:                    if ose.errno != errno.EEXIST:                        raise                write_json_file(cache_spec, cache_fn)            except Exception:                tb = traceback.format_exc()                self._downloader.report_warning(                    u'Writing cache to %r failed: %s' % (cache_fn, tb))
        return res
    def _print_sig_code(self, func, slen):        def gen_sig_code(idxs):            def _genslice(start, end, step):                starts = u'' if start == 0 else str(start)                ends = (u':%d' % (end+step)) if end + step >= 0 else u':'                steps = u'' if step == 1 else (u':%d' % step)                return u's[%s%s%s]' % (starts, ends, steps)
            step = None            start = '(Never used)'  # Quelch pyflakes warnings - start will be                                    # set as soon as step is set            for i, prev in zip(idxs[1:], idxs[:-1]):                if step is not None:                    if i - prev == step:                        continue                    yield _genslice(start, prev, step)                    step = None                    continue                if i - prev in [-1, 1]:                    step = i - prev                    start = prev                    continue                else:                    yield u's[%d]' % prev            if step is None:                yield u's[%d]' % i            else:                yield _genslice(start, i, step)
        test_string = u''.join(map(compat_chr, range(slen)))        cache_res = func(test_string)        cache_spec = [ord(c) for c in cache_res]        expr_code = u' + '.join(gen_sig_code(cache_spec))        code = u'if len(s) == %d:\n    return %s\n' % (slen, expr_code)        self.to_screen(u'Extracted signature function:\n' + code)
    def _parse_sig_js(self, jscode):        funcname = self._search_regex(            r'signature=([a-zA-Z]+)', jscode,            u'Initial JS player signature function name')
        functions = {}
        def argidx(varname):            return string.lowercase.index(varname)
        def interpret_statement(stmt, local_vars, allow_recursion=20):            if allow_recursion < 0:                raise ExtractorError(u'Recursion limit reached')
            if stmt.startswith(u'var '):                stmt = stmt[len(u'var '):]            ass_m = re.match(r'^(?P<out>[a-z]+)(?:\[(?P<index>[^\]]+)\])?' +                             r'=(?P<expr>.*)$', stmt)            if ass_m:                if ass_m.groupdict().get('index'):                    def assign(val):                        lvar = local_vars[ass_m.group('out')]                        idx = interpret_expression(ass_m.group('index'),                                                   local_vars, allow_recursion)                        assert isinstance(idx, int)                        lvar[idx] = val                        return val                    expr = ass_m.group('expr')                else:                    def assign(val):                        local_vars[ass_m.group('out')] = val                        return val                    expr = ass_m.group('expr')            elif stmt.startswith(u'return '):                assign = lambda v: v                expr = stmt[len(u'return '):]            else:                raise ExtractorError(                    u'Cannot determine left side of statement in %r' % stmt)
            v = interpret_expression(expr, local_vars, allow_recursion)            return assign(v)
        def interpret_expression(expr, local_vars, allow_recursion):            if expr.isdigit():                return int(expr)
            if expr.isalpha():                return local_vars[expr]
            m = re.match(r'^(?P<in>[a-z]+)\.(?P<member>.*)$', expr)            if m:                member = m.group('member')                val = local_vars[m.group('in')]                if member == 'split("")':                    return list(val)                if member == 'join("")':                    return u''.join(val)                if member == 'length':                    return len(val)                if member == 'reverse()':                    return val[::-1]                slice_m = re.match(r'slice\((?P<idx>.*)\)', member)                if slice_m:                    idx = interpret_expression(                        slice_m.group('idx'), local_vars, allow_recursion-1)                    return val[idx:]
            m = re.match(                r'^(?P<in>[a-z]+)\[(?P<idx>.+)\]$', expr)            if m:                val = local_vars[m.group('in')]                idx = interpret_expression(m.group('idx'), local_vars,                                           allow_recursion-1)                return val[idx]
            m = re.match(r'^(?P<a>.+?)(?P<op>[%])(?P<b>.+?)$', expr)            if m:                a = interpret_expression(m.group('a'),                                         local_vars, allow_recursion)                b = interpret_expression(m.group('b'),                                         local_vars, allow_recursion)                return a % b
            m = re.match(                r'^(?P<func>[a-zA-Z]+)\((?P<args>[a-z0-9,]+)\)$', expr)            if m:                fname = m.group('func')                if fname not in functions:                    functions[fname] = extract_function(fname)                argvals = [int(v) if v.isdigit() else local_vars[v]                           for v in m.group('args').split(',')]                return functions[fname](argvals)            raise ExtractorError(u'Unsupported JS expression %r' % expr)
        def extract_function(funcname):            func_m = re.search(                r'function ' + re.escape(funcname) +                r'\((?P<args>[a-z,]+)\){(?P<code>[^}]+)}',                jscode)            argnames = func_m.group('args').split(',')
            def resf(args):                local_vars = dict(zip(argnames, args))                for stmt in func_m.group('code').split(';'):                    res = interpret_statement(stmt, local_vars)                return res            return resf
        initial_function = extract_function(funcname)        return lambda s: initial_function([s])
    def _parse_sig_swf(self, file_contents):        if file_contents[1:3] != b'WS':            raise ExtractorError(                u'Not an SWF file; header is %r' % file_contents[:3])        if file_contents[:1] == b'C':            content = zlib.decompress(file_contents[8:])        else:            raise NotImplementedError(u'Unsupported compression format %r' %                                      file_contents[:1])
        def extract_tags(content):            pos = 0            while pos < len(content):                header16 = struct.unpack('<H', content[pos:pos+2])[0]                pos += 2                tag_code = header16 >> 6                tag_len = header16 & 0x3f                if tag_len == 0x3f:                    tag_len = struct.unpack('<I', content[pos:pos+4])[0]                    pos += 4                assert pos+tag_len <= len(content)                yield (tag_code, content[pos:pos+tag_len])                pos += tag_len
        code_tag = next(tag                        for tag_code, tag in extract_tags(content)                        if tag_code == 82)        p = code_tag.index(b'\0', 4) + 1        code_reader = io.BytesIO(code_tag[p:])
        # Parse ABC (AVM2 ByteCode)        def read_int(reader=None):            if reader is None:                reader = code_reader            res = 0            shift = 0            for _ in range(5):                buf = reader.read(1)                assert len(buf) == 1                b = struct.unpack('<B', buf)[0]                res = res | ((b & 0x7f) << shift)                if b & 0x80 == 0:                    break                shift += 7            return res
        def u30(reader=None):            res = read_int(reader)            assert res & 0xf0000000 == 0            return res        u32 = read_int
        def s32(reader=None):            v = read_int(reader)            if v & 0x80000000 != 0:                v = - ((v ^ 0xffffffff) + 1)            return v
        def read_string(reader=None):            if reader is None:                reader = code_reader            slen = u30(reader)            resb = reader.read(slen)            assert len(resb) == slen            return resb.decode('utf-8')
        def read_bytes(count, reader=None):            if reader is None:                reader = code_reader            resb = reader.read(count)            assert len(resb) == count            return resb
        def read_byte(reader=None):            resb = read_bytes(1, reader=reader)            res = struct.unpack('<B', resb)[0]            return res
        # minor_version + major_version        read_bytes(2 + 2)
        # Constant pool        int_count = u30()        for _c in range(1, int_count):            s32()        uint_count = u30()        for _c in range(1, uint_count):            u32()        double_count = u30()        read_bytes((double_count-1) * 8)        string_count = u30()        constant_strings = [u'']        for _c in range(1, string_count):            s = read_string()            constant_strings.append(s)        namespace_count = u30()        for _c in range(1, namespace_count):            read_bytes(1)  # kind            u30()  # name        ns_set_count = u30()        for _c in range(1, ns_set_count):            count = u30()            for _c2 in range(count):                u30()        multiname_count = u30()        MULTINAME_SIZES = {            0x07: 2,  # QName            0x0d: 2,  # QNameA            0x0f: 1,  # RTQName            0x10: 1,  # RTQNameA            0x11: 0,  # RTQNameL            0x12: 0,  # RTQNameLA            0x09: 2,  # Multiname            0x0e: 2,  # MultinameA            0x1b: 1,  # MultinameL            0x1c: 1,  # MultinameLA        }        multinames = [u'']        for _c in range(1, multiname_count):            kind = u30()            assert kind in MULTINAME_SIZES, u'Invalid multiname kind %r' % kind            if kind == 0x07:                u30()  # namespace_idx                name_idx = u30()                multinames.append(constant_strings[name_idx])            else:                multinames.append('[MULTINAME kind: %d]' % kind)                for _c2 in range(MULTINAME_SIZES[kind]):                    u30()
        # Methods        method_count = u30()        MethodInfo = collections.namedtuple(            'MethodInfo',            ['NEED_ARGUMENTS', 'NEED_REST'])        method_infos = []        for method_id in range(method_count):            param_count = u30()            u30()  # return type            for _ in range(param_count):                u30()  # param type            u30()  # name index (always 0 for youtube)            flags = read_byte()            if flags & 0x08 != 0:                # Options present                option_count = u30()                for c in range(option_count):                    u30()  # val                    read_bytes(1)  # kind            if flags & 0x80 != 0:                # Param names present                for _ in range(param_count):                    u30()  # param name            mi = MethodInfo(flags & 0x01 != 0, flags & 0x04 != 0)            method_infos.append(mi)
        # Metadata        metadata_count = u30()        for _c in range(metadata_count):            u30()  # name            item_count = u30()            for _c2 in range(item_count):                u30()  # key                u30()  # value
        def parse_traits_info():            trait_name_idx = u30()            kind_full = read_byte()            kind = kind_full & 0x0f            attrs = kind_full >> 4            methods = {}            if kind in [0x00, 0x06]:  # Slot or Const                u30()  # Slot id                u30()  # type_name_idx                vindex = u30()                if vindex != 0:                    read_byte()  # vkind            elif kind in [0x01, 0x02, 0x03]:  # Method / Getter / Setter                u30()  # disp_id                method_idx = u30()                methods[multinames[trait_name_idx]] = method_idx            elif kind == 0x04:  # Class                u30()  # slot_id                u30()  # classi            elif kind == 0x05:  # Function                u30()  # slot_id                function_idx = u30()                methods[function_idx] = multinames[trait_name_idx]            else:                raise ExtractorError(u'Unsupported trait kind %d' % kind)
            if attrs & 0x4 != 0:  # Metadata present                metadata_count = u30()                for _c3 in range(metadata_count):                    u30()  # metadata index
            return methods
        # Classes        TARGET_CLASSNAME = u'SignatureDecipher'        searched_idx = multinames.index(TARGET_CLASSNAME)        searched_class_id = None        class_count = u30()        for class_id in range(class_count):            name_idx = u30()            if name_idx == searched_idx:                # We found the class we're looking for!                searched_class_id = class_id            u30()  # super_name idx            flags = read_byte()            if flags & 0x08 != 0:  # Protected namespace is present                u30()  # protected_ns_idx            intrf_count = u30()            for _c2 in range(intrf_count):                u30()            u30()  # iinit            trait_count = u30()            for _c2 in range(trait_count):                parse_traits_info()
        if searched_class_id is None:            raise ExtractorError(u'Target class %r not found' %                                 TARGET_CLASSNAME)
        method_names = {}        method_idxs = {}        for class_id in range(class_count):            u30()  # cinit            trait_count = u30()            for _c2 in range(trait_count):                trait_methods = parse_traits_info()                if class_id == searched_class_id:                    method_names.update(trait_methods.items())                    method_idxs.update(dict(                        (idx, name)                        for name, idx in trait_methods.items()))
        # Scripts        script_count = u30()        for _c in range(script_count):            u30()  # init            trait_count = u30()            for _c2 in range(trait_count):                parse_traits_info()
        # Method bodies        method_body_count = u30()        Method = collections.namedtuple('Method', ['code', 'local_count'])        methods = {}        for _c in range(method_body_count):            method_idx = u30()            u30()  # max_stack            local_count = u30()            u30()  # init_scope_depth            u30()  # max_scope_depth            code_length = u30()            code = read_bytes(code_length)            if method_idx in method_idxs:                m = Method(code, local_count)                methods[method_idxs[method_idx]] = m            exception_count = u30()            for _c2 in range(exception_count):                u30()  # from                u30()  # to                u30()  # target                u30()  # exc_type                u30()  # var_name            trait_count = u30()            for _c2 in range(trait_count):                parse_traits_info()
        assert p + code_reader.tell() == len(code_tag)        assert len(methods) == len(method_idxs)
        method_pyfunctions = {}
        def extract_function(func_name):            if func_name in method_pyfunctions:                return method_pyfunctions[func_name]            if func_name not in methods:                raise ExtractorError(u'Cannot find function %r' % func_name)            m = methods[func_name]
            def resfunc(args):                registers = ['(this)'] + list(args) + [None] * m.local_count                stack = []                coder = io.BytesIO(m.code)                while True:                    opcode = struct.unpack('!B', coder.read(1))[0]                    if opcode == 36:  # pushbyte                        v = struct.unpack('!B', coder.read(1))[0]                        stack.append(v)                    elif opcode == 44:  # pushstring                        idx = u30(coder)                        stack.append(constant_strings[idx])                    elif opcode == 48:  # pushscope                        # We don't implement the scope register, so we'll just                        # ignore the popped value                        stack.pop()                    elif opcode == 70:  # callproperty                        index = u30(coder)                        mname = multinames[index]                        arg_count = u30(coder)                        args = list(reversed(                            [stack.pop() for _ in range(arg_count)]))                        obj = stack.pop()                        if mname == u'split':                            assert len(args) == 1                            assert isinstance(args[0], compat_str)                            assert isinstance(obj, compat_str)                            if args[0] == u'':                                res = list(obj)                            else:                                res = obj.split(args[0])                            stack.append(res)                        elif mname == u'slice':                            assert len(args) == 1                            assert isinstance(args[0], int)                            assert isinstance(obj, list)                            res = obj[args[0]:]                            stack.append(res)                        elif mname == u'join':                            assert len(args) == 1                            assert isinstance(args[0], compat_str)                            assert isinstance(obj, list)                            res = args[0].join(obj)                            stack.append(res)                        elif mname in method_pyfunctions:                            stack.append(method_pyfunctions[mname](args))                        else:                            raise NotImplementedError(                                u'Unsupported property %r on %r'                                % (mname, obj))                    elif opcode == 72:  # returnvalue                        res = stack.pop()                        return res                    elif opcode == 79:  # callpropvoid                        index = u30(coder)                        mname = multinames[index]                        arg_count = u30(coder)                        args = list(reversed(                            [stack.pop() for _ in range(arg_count)]))                        obj = stack.pop()                        if mname == u'reverse':                            assert isinstance(obj, list)                            obj.reverse()                        else:                            raise NotImplementedError(                                u'Unsupported (void) property %r on %r'                                % (mname, obj))                    elif opcode == 93:  # findpropstrict                        index = u30(coder)                        mname = multinames[index]                        res = extract_function(mname)                        stack.append(res)                    elif opcode == 97:  # setproperty                        index = u30(coder)                        value = stack.pop()                        idx = stack.pop()                        obj = stack.pop()                        assert isinstance(obj, list)                        assert isinstance(idx, int)                        obj[idx] = value                    elif opcode == 98:  # getlocal                        index = u30(coder)                        stack.append(registers[index])                    elif opcode == 99:  # setlocal                        index = u30(coder)                        value = stack.pop()                        registers[index] = value                    elif opcode == 102:  # getproperty                        index = u30(coder)                        pname = multinames[index]                        if pname == u'length':                            obj = stack.pop()                            assert isinstance(obj, list)                            stack.append(len(obj))                        else:  # Assume attribute access                            idx = stack.pop()                            assert isinstance(idx, int)                            obj = stack.pop()                            assert isinstance(obj, list)                            stack.append(obj[idx])                    elif opcode == 128:  # coerce                        u30(coder)                    elif opcode == 133:  # coerce_s                        assert isinstance(stack[-1], (type(None), compat_str))                    elif opcode == 164:  # modulo                        value2 = stack.pop()                        value1 = stack.pop()                        res = value1 % value2                        stack.append(res)                    elif opcode == 208:  # getlocal_0                        stack.append(registers[0])                    elif opcode == 209:  # getlocal_1                        stack.append(registers[1])                    elif opcode == 210:  # getlocal_2                        stack.append(registers[2])                    elif opcode == 211:  # getlocal_3                        stack.append(registers[3])                    elif opcode == 214:  # setlocal_2                        registers[2] = stack.pop()                    elif opcode == 215:  # setlocal_3                        registers[3] = stack.pop()                    else:                        raise NotImplementedError(                            u'Unsupported opcode %d' % opcode)
            method_pyfunctions[func_name] = resfunc            return resfunc
        initial_function = extract_function(u'decipher')        return lambda s: initial_function([s])
    def _decrypt_signature(self, s, video_id, player_url, age_gate=False):        """Turn the encrypted s field into a working signature"""
        if player_url is not None:            if player_url.startswith(u'//'):                player_url = u'https:' + player_url            try:                player_id = (player_url, len(s))                if player_id not in self._player_cache:                    func = self._extract_signature_function(                        video_id, player_url, len(s)                    )                    self._player_cache[player_id] = func                func = self._player_cache[player_id]                if self._downloader.params.get('youtube_print_sig_code'):                    self._print_sig_code(func, len(s))                return func(s)            except Exception:                tb = traceback.format_exc()                self._downloader.report_warning(                    u'Automatic signature extraction failed: ' + tb)
            self._downloader.report_warning(                u'Warning: Falling back to static signature algorithm')
        return self._static_decrypt_signature(            s, video_id, player_url, age_gate)
    def _static_decrypt_signature(self, s, video_id, player_url, age_gate):        if age_gate:            # The videos with age protection use another player, so the            # algorithms can be different.            if len(s) == 86:                return s[2:63] + s[82] + s[64:82] + s[63]
        if len(s) == 93:            return s[86:29:-1] + s[88] + s[28:5:-1]        elif len(s) == 92:            return s[25] + s[3:25] + s[0] + s[26:42] + s[79] + s[43:79] + s[91] + s[80:83]        elif len(s) == 91:            return s[84:27:-1] + s[86] + s[26:5:-1]        elif len(s) == 90:            return s[25] + s[3:25] + s[2] + s[26:40] + s[77] + s[41:77] + s[89] + s[78:81]        elif len(s) == 89:            return s[84:78:-1] + s[87] + s[77:60:-1] + s[0] + s[59:3:-1]        elif len(s) == 88:            return s[7:28] + s[87] + s[29:45] + s[55] + s[46:55] + s[2] + s[56:87] + s[28]        elif len(s) == 87:            return s[6:27] + s[4] + s[28:39] + s[27] + s[40:59] + s[2] + s[60:]        elif len(s) == 86:            return s[80:72:-1] + s[16] + s[71:39:-1] + s[72] + s[38:16:-1] + s[82] + s[15::-1]        elif len(s) == 85:            return s[3:11] + s[0] + s[12:55] + s[84] + s[56:84]        elif len(s) == 84:            return s[78:70:-1] + s[14] + s[69:37:-1] + s[70] + s[36:14:-1] + s[80] + s[:14][::-1]        elif len(s) == 83:            return s[80:63:-1] + s[0] + s[62:0:-1] + s[63]        elif len(s) == 82:            return s[80:37:-1] + s[7] + s[36:7:-1] + s[0] + s[6:0:-1] + s[37]        elif len(s) == 81:            return s[56] + s[79:56:-1] + s[41] + s[55:41:-1] + s[80] + s[40:34:-1] + s[0] + s[33:29:-1] + s[34] + s[28:9:-1] + s[29] + s[8:0:-1] + s[9]        elif len(s) == 80:            return s[1:19] + s[0] + s[20:68] + s[19] + s[69:80]        elif len(s) == 79:            return s[54] + s[77:54:-1] + s[39] + s[53:39:-1] + s[78] + s[38:34:-1] + s[0] + s[33:29:-1] + s[34] + s[28:9:-1] + s[29] + s[8:0:-1] + s[9]
        else:            raise ExtractorError(u'Unable to decrypt signature, key length %d not supported; retrying might work' % (len(s)))
    def _get_available_subtitles(self, video_id, webpage):        try:            sub_list = self._download_webpage(                'http://video.google.com/timedtext?hl=en&type=list&v=%s' % video_id,                video_id, note=False)        except ExtractorError as err:            self._downloader.report_warning(u'unable to download video subtitles: %s' % compat_str(err))            return {}        lang_list = re.findall(r'name="([^"]*)"[^>]+lang_code="([\w\-]+)"', sub_list)
        sub_lang_list = {}        for l in lang_list:            lang = l[1]            params = compat_urllib_parse.urlencode({                'lang': lang,                'v': video_id,                'fmt': self._downloader.params.get('subtitlesformat', 'srt'),                'name': l[0].encode('utf-8'),            })            url = u'http://www.youtube.com/api/timedtext?' + params            sub_lang_list[lang] = url        if not sub_lang_list:            self._downloader.report_warning(u'video doesn\'t have subtitles')            return {}        return sub_lang_list
    def _get_available_automatic_caption(self, video_id, webpage):        """We need the webpage for getting the captions url, pass it as an
           argument to speed up the process."""
        sub_format = self._downloader.params.get('subtitlesformat', 'srt')        self.to_screen(u'%s: Looking for automatic captions' % video_id)        mobj = re.search(r';ytplayer.config = ({.*?});', webpage)        err_msg = u'Couldn\'t find automatic captions for %s' % video_id        if mobj is None:            self._downloader.report_warning(err_msg)            return {}        player_config = json.loads(mobj.group(1))        try:            args = player_config[u'args']            caption_url = args[u'ttsurl']            timestamp = args[u'timestamp']            # We get the available subtitles            list_params = compat_urllib_parse.urlencode({                'type': 'list',                'tlangs': 1,                'asrs': 1,            })            list_url = caption_url + '&' + list_params            caption_list = self._download_xml(list_url, video_id)            original_lang_node = caption_list.find('track')            if original_lang_node is None or original_lang_node.attrib.get('kind') != 'asr' :                self._downloader.report_warning(u'Video doesn\'t have automatic captions')                return {}            original_lang = original_lang_node.attrib['lang_code']
            sub_lang_list = {}            for lang_node in caption_list.findall('target'):                sub_lang = lang_node.attrib['lang_code']                params = compat_urllib_parse.urlencode({                    'lang': original_lang,                    'tlang': sub_lang,                    'fmt': sub_format,                    'ts': timestamp,                    'kind': 'asr',                })                sub_lang_list[sub_lang] = caption_url + '&' + params            return sub_lang_list        # An extractor error can be raise by the download process if there are        # no automatic captions but there are subtitles        except (KeyError, ExtractorError):            self._downloader.report_warning(err_msg)            return {}
    def _print_formats(self, formats):        print('Available formats:')        for x in formats:            print('%s\t:\t%s\t[%s]%s' %(x, self._video_extensions.get(x, 'flv'),                                        self._video_dimensions.get(x, '???'),                                        ' ('+self._special_itags[x]+')' if x in self._special_itags else ''))
    def _extract_id(self, url):        mobj = re.match(self._VALID_URL, url, re.VERBOSE)        if mobj is None:            raise ExtractorError(u'Invalid URL: %s' % url)        video_id = mobj.group(2)        return video_id
    def _get_video_url_list(self, url_map):        """
        Transform a dictionary in the format {itag:url} to a list of (itag, url)        with the requested formats.        """
        req_format = self._downloader.params.get('format', None)        format_limit = self._downloader.params.get('format_limit', None)        available_formats = self._available_formats_prefer_free if self._downloader.params.get('prefer_free_formats', False) else self._available_formats        if format_limit is not None and format_limit in available_formats:            format_list = available_formats[available_formats.index(format_limit):]        else:            format_list = available_formats        existing_formats = [x for x in format_list if x in url_map]        if len(existing_formats) == 0:            raise ExtractorError(u'no known formats available for video')        if self._downloader.params.get('listformats', None):            self._print_formats(existing_formats)            return        if req_format is None or req_format == 'best':            video_url_list = [(existing_formats[0], url_map[existing_formats[0]])] # Best quality        elif req_format == 'worst':            video_url_list = [(existing_formats[-1], url_map[existing_formats[-1]])] # worst quality        elif req_format in ('-1', 'all'):            video_url_list = [(f, url_map[f]) for f in existing_formats] # All formats        else:            # Specific formats. We pick the first in a slash-delimeted sequence.            # Format can be specified as itag or 'mp4' or 'flv' etc. We pick the highest quality            # available in the specified format. For example,            # if '1/2/3/4' is requested and '2' and '4' are available, we pick '2'.            # if '1/mp4/3/4' is requested and '1' and '5' (is a mp4) are available, we pick '1'.            # if '1/mp4/3/4' is requested and '4' and '5' (is a mp4) are available, we pick '5'.            req_formats = req_format.split('/')            video_url_list = None            for rf in req_formats:                if rf in url_map:                    video_url_list = [(rf, url_map[rf])]                    break                if rf in self._video_formats_map:                    for srf in self._video_formats_map[rf]:                        if srf in url_map:                            video_url_list = [(srf, url_map[srf])]                            break                    else:                        continue                    break            if video_url_list is None:                raise ExtractorError(u'requested format not available')        return video_url_list
    def _extract_from_m3u8(self, manifest_url, video_id):        url_map = {}        def _get_urls(_manifest):            lines = _manifest.split('\n')            urls = filter(lambda l: l and not l.startswith('#'),                            lines)            return urls        manifest = self._download_webpage(manifest_url, video_id, u'Downloading formats manifest')        formats_urls = _get_urls(manifest)        for format_url in formats_urls:            itag = self._search_regex(r'itag/(\d+?)/', format_url, 'itag')            url_map[itag] = format_url        return url_map
    def _extract_annotations(self, video_id):        url = 'https://www.youtube.com/annotations_invideo?features=1&legacy=1&video_id=%s' % video_id        return self._download_webpage(url, video_id, note=u'Searching for annotations.', errnote=u'Unable to download video annotations.')
    def _real_extract(self, url):        # Extract original video URL from URL with redirection, like age verification, using next_url parameter        mobj = re.search(self._NEXT_URL_RE, url)        if mobj:            url = 'https://www.youtube.com/' + compat_urllib_parse.unquote(mobj.group(1)).lstrip('/')        video_id = self._extract_id(url)
        # Get video webpage        url = 'https://www.youtube.com/watch?v=%s&gl=US&hl=en&has_verified=1' % video_id        video_webpage = self._download_webpage(url, video_id)
        # Attempt to extract SWF player URL        mobj = re.search(r'swfConfig.*?"(https?:\\/\\/.*?watch.*?-.*?\.swf)"', video_webpage)        if mobj is not None:            player_url = re.sub(r'\\(.)', r'\1', mobj.group(1))        else:            player_url = None
        # Get video info        self.report_video_info_webpage_download(video_id)        if re.search(r'player-age-gate-content">', video_webpage) is not None:            self.report_age_confirmation()            age_gate = True            # We simulate the access to the video from www.youtube.com/v/{video_id}            # this can be viewed without login into Youtube            data = compat_urllib_parse.urlencode({'video_id': video_id,                                                  'el': 'player_embedded',                                                  'gl': 'US',                                                  'hl': 'en',                                                  'eurl': 'https://youtube.googleapis.com/v/' + video_id,                                                  'asv': 3,                                                  'sts':'1588',                                                  })            video_info_url = 'https://www.youtube.com/get_video_info?' + data            video_info_webpage = self._download_webpage(video_info_url, video_id,                                    note=False,                                    errnote='unable to download video info webpage')            video_info = compat_parse_qs(video_info_webpage)        else:            age_gate = False            for el_type in ['&el=embedded', '&el=detailpage', '&el=vevo', '']:                video_info_url = ('https://www.youtube.com/get_video_info?&video_id=%s%s&ps=default&eurl=&gl=US&hl=en'                        % (video_id, el_type))                video_info_webpage = self._download_webpage(video_info_url, video_id,                                        note=False,                                        errnote='unable to download video info webpage')                video_info = compat_parse_qs(video_info_webpage)                if 'token' in video_info:                    break        if 'token' not in video_info:            if 'reason' in video_info:                raise ExtractorError(u'YouTube said: %s' % video_info['reason'][0], expected=True)            else:                raise ExtractorError(u'"token" parameter not in video info for unknown reason')
        if 'view_count' in video_info:            view_count = int(video_info['view_count'][0])        else:            view_count = None
        # Check for "rental" videos        if 'ypc_video_rental_bar_text' in video_info and 'author' not in video_info:            raise ExtractorError(u'"rental" videos not supported')
        # Start extracting information        self.report_information_extraction(video_id)
        # uploader        if 'author' not in video_info:            raise ExtractorError(u'Unable to extract uploader name')        video_uploader = compat_urllib_parse.unquote_plus(video_info['author'][0])
        # uploader_id        video_uploader_id = None        mobj = re.search(r'<link itemprop="url" href="http://www.youtube.com/(?:user|channel)/([^"]+)">', video_webpage)        if mobj is not None:            video_uploader_id = mobj.group(1)        else:            self._downloader.report_warning(u'unable to extract uploader nickname')
        # title        if 'title' in video_info:            video_title = compat_urllib_parse.unquote_plus(video_info['title'][0])        else:            self._downloader.report_warning(u'Unable to extract video title')            video_title = u'_'
        # thumbnail image        # We try first to get a high quality image:        m_thumb = re.search(r'<span itemprop="thumbnail".*?href="(.*?)">',                            video_webpage, re.DOTALL)        if m_thumb is not None:            video_thumbnail = m_thumb.group(1)        elif 'thumbnail_url' not in video_info:            self._downloader.report_warning(u'unable to extract video thumbnail')            video_thumbnail = None        else:   # don't panic if we can't find it            video_thumbnail = compat_urllib_parse.unquote_plus(video_info['thumbnail_url'][0])
        # upload date        upload_date = None        mobj = re.search(r'id="eow-date.*?>(.*?)</span>', video_webpage, re.DOTALL)        if mobj is not None:            upload_date = ' '.join(re.sub(r'[/,-]', r' ', mobj.group(1)).split())            upload_date = unified_strdate(upload_date)
        # description        video_description = get_element_by_id("eow-description", video_webpage)        if video_description:            video_description = re.sub(r'''(?x)
                <a\s+                    (?:[a-zA-Z-]+="[^"]+"\s+)*?                    title="([^"]+)"\s+                    (?:[a-zA-Z-]+="[^"]+"\s+)*?                    class="yt-uix-redirect-link"\s*>                [^<]+                </a>            ''', r'\1', video_description)
            video_description = clean_html(video_description)        else:            fd_mobj = re.search(r'<meta name="description" content="([^"]+)"', video_webpage)            if fd_mobj:                video_description = unescapeHTML(fd_mobj.group(1))            else:                video_description = u''
        def _extract_count(klass):            count = self._search_regex(                r'class="%s">([\d,]+)</span>' % re.escape(klass),                video_webpage, klass, default=None)            if count is not None:                return int(count.replace(',', ''))            return None        like_count = _extract_count(u'likes-count')        dislike_count = _extract_count(u'dislikes-count')
        # subtitles        video_subtitles = self.extract_subtitles(video_id, video_webpage)
        if self._downloader.params.get('listsubtitles', False):            self._list_available_subtitles(video_id, video_webpage)            return
        if 'length_seconds' not in video_info:            self._downloader.report_warning(u'unable to extract video duration')            video_duration = None        else:            video_duration = int(compat_urllib_parse.unquote_plus(video_info['length_seconds'][0]))
        # annotations        video_annotations = None        if self._downloader.params.get('writeannotations', False):                video_annotations = self._extract_annotations(video_id)
        # Decide which formats to download
        try:            mobj = re.search(r';ytplayer.config = ({.*?});', video_webpage)            if not mobj:                raise ValueError('Could not find vevo ID')            info = json.loads(mobj.group(1))            args = info['args']            # Easy way to know if the 's' value is in url_encoded_fmt_stream_map            # this signatures are encrypted            if 'url_encoded_fmt_stream_map' not in args:                raise ValueError(u'No stream_map present')  # caught below            re_signature = re.compile(r'[&,]s=')            m_s = re_signature.search(args['url_encoded_fmt_stream_map'])            if m_s is not None:                self.to_screen(u'%s: Encrypted signatures detected.' % video_id)                video_info['url_encoded_fmt_stream_map'] = [args['url_encoded_fmt_stream_map']]            m_s = re_signature.search(args.get('adaptive_fmts', u''))            if m_s is not None:                if 'adaptive_fmts' in video_info:                    video_info['adaptive_fmts'][0] += ',' + args['adaptive_fmts']                else:                    video_info['adaptive_fmts'] = [args['adaptive_fmts']]        except ValueError:            pass
        if 'conn' in video_info and video_info['conn'][0].startswith('rtmp'):            self.report_rtmp_download()            video_url_list = [(None, video_info['conn'][0])]        elif len(video_info.get('url_encoded_fmt_stream_map', [])) >= 1 or len(video_info.get('adaptive_fmts', [])) >= 1:            encoded_url_map = video_info.get('url_encoded_fmt_stream_map', [''])[0] + ',' + video_info.get('adaptive_fmts',[''])[0]            if 'rtmpe%3Dyes' in encoded_url_map:                raise ExtractorError('rtmpe downloads are not supported, see https://github.com/rg3/youtube-dl/issues/343 for more information.', expected=True)            url_map = {}            for url_data_str in encoded_url_map.split(','):                url_data = compat_parse_qs(url_data_str)                if 'itag' in url_data and 'url' in url_data:                    url = url_data['url'][0]                    if 'sig' in url_data:                        url += '&signature=' + url_data['sig'][0]                    elif 's' in url_data:                        encrypted_sig = url_data['s'][0]                        if self._downloader.params.get('verbose'):                            if age_gate:                                if player_url is None:                                    player_version = 'unknown'                                else:                                    player_version = self._search_regex(                                        r'-(.+)\.swf$', player_url,                                        u'flash player', fatal=False)                                player_desc = 'flash player %s' % player_version                            else:                                player_version = self._search_regex(                                    r'html5player-(.+?)\.js', video_webpage,                                    'html5 player', fatal=False)                                player_desc = u'html5 player %s' % player_version
                            parts_sizes = u'.'.join(compat_str(len(part)) for part in encrypted_sig.split('.'))                            self.to_screen(u'encrypted signature length %d (%s), itag %s, %s' %                                (len(encrypted_sig), parts_sizes, url_data['itag'][0], player_desc))
                        if not age_gate:                            jsplayer_url_json = self._search_regex(                                r'"assets":.+?"js":\s*("[^"]+")',                                video_webpage, u'JS player URL')                            player_url = json.loads(jsplayer_url_json)
                        signature = self._decrypt_signature(                            encrypted_sig, video_id, player_url, age_gate)                        url += '&signature=' + signature                    if 'ratebypass' not in url:                        url += '&ratebypass=yes'                    url_map[url_data['itag'][0]] = url            video_url_list = self._get_video_url_list(url_map)            if not video_url_list:                return        elif video_info.get('hlsvp'):            manifest_url = video_info['hlsvp'][0]            url_map = self._extract_from_m3u8(manifest_url, video_id)            video_url_list = self._get_video_url_list(url_map)            if not video_url_list:                return
        else:            raise ExtractorError(u'no conn, hlsvp or url_encoded_fmt_stream_map information found in video info')
        results = []        for itag, video_real_url in video_url_list:            # Extension            video_extension = self._video_extensions.get(itag, 'flv')
            video_format = '{0} - {1}{2}'.format(itag if itag else video_extension,                                              self._video_dimensions.get(itag, '???'),                                              ' ('+self._special_itags[itag]+')' if itag in self._special_itags else '')
            results.append({                'id':       video_id,                'url':      video_real_url,                'uploader': video_uploader,                'uploader_id': video_uploader_id,                'upload_date':  upload_date,                'title':    video_title,                'ext':      video_extension,                'format':   video_format,                'format_id': itag,                'thumbnail':    video_thumbnail,                'description':  video_description,                'player_url':   player_url,                'subtitles':    video_subtitles,                'duration':     video_duration,                'age_limit':    18 if age_gate else 0,                'annotations':  video_annotations,                'webpage_url': 'https://www.youtube.com/watch?v=%s' % video_id,                'view_count': view_count,                'like_count': like_count,                'dislike_count': dislike_count,            })        return results
class YoutubePlaylistIE(YoutubeBaseInfoExtractor):    IE_DESC = u'YouTube.com playlists'    _VALID_URL = r"""(?:
                        (?:https?://)?                        (?:\w+\.)?                        youtube\.com/                        (?:                           (?:course|view_play_list|my_playlists|artist|playlist|watch)                           \? (?:.*?&)*? (?:p|a|list)=                        |  p/                        )                        ((?:PL|EC|UU|FL|RD)?[0-9A-Za-z-_]{10,})                        .*                     |                        ((?:PL|EC|UU|FL|RD)[0-9A-Za-z-_]{10,})                     )"""
    _TEMPLATE_URL = 'https://www.youtube.com/playlist?list=%s&page=%s'    _MORE_PAGES_INDICATOR = r'data-link-type="next"'    _VIDEO_RE = r'href="/watch\?v=(?P<id>[0-9A-Za-z_-]{11})&amp;[^"]*?index=(?P<index>\d+)'    IE_NAME = u'youtube:playlist'
    @classmethod    def suitable(cls, url):        """Receives a URL and returns True if suitable for this IE."""        return re.match(cls._VALID_URL, url, re.VERBOSE) is not None
    def _real_initialize(self):        self._login()
    def _ids_to_results(self, ids):        return [self.url_result(vid_id, 'Youtube', video_id=vid_id)                       for vid_id in ids]
    def _extract_mix(self, playlist_id):        # The mixes are generated from a a single video        # the id of the playlist is just 'RD' + video_id        url = 'https://youtube.com/watch?v=%s&list=%s' % (playlist_id[-11:], playlist_id)        webpage = self._download_webpage(url, playlist_id, u'Downloading Youtube mix')        title_span = (get_element_by_attribute('class', 'title long-title', webpage) or            get_element_by_attribute('class', 'title ', webpage))        title = clean_html(title_span)        video_re = r'data-index="\d+".*?href="/watch\?v=([0-9A-Za-z_-]{11})&amp;[^"]*?list=%s' % re.escape(playlist_id)        ids = orderedSet(re.findall(video_re, webpage))        url_results = self._ids_to_results(ids)
        return self.playlist_result(url_results, playlist_id, title)
    def _real_extract(self, url):        # Extract playlist id        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(video_id, 'Youtube', video_id=video_id)            else:                self.to_screen(u'Downloading playlist PL%s - add --no-playlist to just download video %s' % (playlist_id, video_id))
        if playlist_id.startswith('RD'):            # Mixes require a custom extraction process            return self._extract_mix(playlist_id)        if playlist_id.startswith('TL'):            raise ExtractorError(u'For downloading YouTube.com top lists, use '                u'the "yttoplist" keyword, for example "youtube-dl \'yttoplist:music:Top Tracks\'"', expected=True)
        # Extract the video ids from the playlist pages        ids = []
        for page_num in itertools.count(1):            url = self._TEMPLATE_URL % (playlist_id, page_num)            page = self._download_webpage(url, playlist_id, u'Downloading page #%s' % page_num)            matches = re.finditer(self._VIDEO_RE, page)            # We remove the duplicates and the link with index 0            # (it's not the first video of the playlist)            new_ids = orderedSet(m.group('id') for m in matches if m.group('index') != '0')            ids.extend(new_ids)
            if re.search(self._MORE_PAGES_INDICATOR, page) is None:                break
        playlist_title = self._og_search_title(page)
        url_results = self._ids_to_results(ids)        return self.playlist_result(url_results, playlist_id, playlist_title)

class YoutubeTopListIE(YoutubePlaylistIE):    IE_NAME = u'youtube:toplist'    IE_DESC = (u'YouTube.com top lists, "yttoplist:{channel}:{list title}"'        u' (Example: "yttoplist:music:Top Tracks")')    _VALID_URL = r'yttoplist:(?P<chann>.*?):(?P<title>.*?)$'
    def _real_extract(self, url):        mobj = re.match(self._VALID_URL, url)        channel = mobj.group('chann')        title = mobj.group('title')        query = compat_urllib_parse.urlencode({'title': title})        playlist_re = 'href="([^"]+?%s[^"]+?)"' % re.escape(query)        channel_page = self._download_webpage('https://www.youtube.com/%s' % channel, title)        link = self._html_search_regex(playlist_re, channel_page, u'list')        url = compat_urlparse.urljoin('https://www.youtube.com/', link)                video_re = r'data-index="\d+".*?data-video-id="([0-9A-Za-z_-]{11})"'        ids = []        # sometimes the webpage doesn't contain the videos        # retry until we get them        for i in itertools.count(0):            msg = u'Downloading Youtube mix'            if i > 0:                msg += ', retry #%d' % i            webpage = self._download_webpage(url, title, msg)            ids = orderedSet(re.findall(video_re, webpage))            if ids:                break        url_results = self._ids_to_results(ids)        return self.playlist_result(url_results, playlist_title=title)

class YoutubeChannelIE(InfoExtractor):    IE_DESC = u'YouTube.com channels'    _VALID_URL = r"^(?:https?://)?(?:youtu\.be|(?:\w+\.)?youtube(?:-nocookie)?\.com)/channel/([0-9A-Za-z_-]+)"    _MORE_PAGES_INDICATOR = 'yt-uix-load-more'    _MORE_PAGES_URL = 'http://www.youtube.com/c4_browse_ajax?action_load_more_videos=1&flow=list&paging=%s&view=0&sort=da&channel_id=%s'    IE_NAME = u'youtube:channel'
    def extract_videos_from_page(self, page):        ids_in_page = []        for mobj in re.finditer(r'href="/watch\?v=([0-9A-Za-z_-]+)&?', page):            if mobj.group(1) not in ids_in_page:                ids_in_page.append(mobj.group(1))        return ids_in_page
    def _real_extract(self, url):        # Extract channel id        mobj = re.match(self._VALID_URL, url)        if mobj is None:            raise ExtractorError(u'Invalid URL: %s' % url)
        # Download channel page        channel_id = mobj.group(1)        video_ids = []        url = 'https://www.youtube.com/channel/%s/videos' % channel_id        channel_page = self._download_webpage(url, channel_id)        autogenerated = re.search(r'''(?x)
                class="[^"]*?(?:                    channel-header-autogenerated-label|                    yt-channel-title-autogenerated                )[^"]*"''', channel_page) is not None

        if autogenerated:            # The videos are contained in a single page            # the ajax pages can't be used, they are empty            video_ids = self.extract_videos_from_page(channel_page)        else:            # Download all channel pages using the json-based channel_ajax query            for pagenum in itertools.count(1):                url = self._MORE_PAGES_URL % (pagenum, channel_id)                page = self._download_webpage(url, channel_id,                                              u'Downloading page #%s' % pagenum)                    page = json.loads(page)                    ids_in_page = self.extract_videos_from_page(page['content_html'])                video_ids.extend(ids_in_page)                    if self._MORE_PAGES_INDICATOR not in page['load_more_widget_html']:                    break
        self._downloader.to_screen(u'[youtube] Channel %s: Found %i videos' % (channel_id, len(video_ids)))
        url_entries = [self.url_result(video_id, 'Youtube', video_id=video_id)                       for video_id in video_ids]        return self.playlist_result(url_entries, channel_id)

class YoutubeUserIE(InfoExtractor):    IE_DESC = u'YouTube.com user videos (URL or "ytuser" keyword)'    _VALID_URL = r'(?:(?:(?:https?://)?(?:\w+\.)?youtube\.com/(?:user/)?(?!(?:attribution_link|watch)(?:$|[^a-z_A-Z0-9-])))|ytuser:)(?!feed/)([A-Za-z0-9_-]+)'    _TEMPLATE_URL = 'http://gdata.youtube.com/feeds/api/users/%s'    _GDATA_PAGE_SIZE = 50    _GDATA_URL = 'http://gdata.youtube.com/feeds/api/users/%s/uploads?max-results=%d&start-index=%d&alt=json'    IE_NAME = u'youtube:user'
    @classmethod    def suitable(cls, url):        # Don't return True if the url can be extracted with other youtube        # extractor, the regex would is too permissive and it would match.        other_ies = iter(klass for (name, klass) in globals().items() if name.endswith('IE') and klass is not cls)        if any(ie.suitable(url) for ie in other_ies): return False        else: return super(YoutubeUserIE, cls).suitable(url)
    def _real_extract(self, url):        # Extract username        mobj = re.match(self._VALID_URL, url)        if mobj is None:            raise ExtractorError(u'Invalid URL: %s' % url)
        username = mobj.group(1)
        # Download video ids using YouTube Data API. Result size per        # query is limited (currently to 50 videos) so we need to query        # page by page until there are no video ids - it means we got        # all of them.
        video_ids = []
        for pagenum in itertools.count(0):            start_index = pagenum * self._GDATA_PAGE_SIZE + 1
            gdata_url = self._GDATA_URL % (username, self._GDATA_PAGE_SIZE, start_index)            page = self._download_webpage(gdata_url, username,                                          u'Downloading video ids from %d to %d' % (start_index, start_index + self._GDATA_PAGE_SIZE))
            try:                response = json.loads(page)            except ValueError as err:                raise ExtractorError(u'Invalid JSON in API response: ' + compat_str(err))            if 'entry' not in response['feed']:                # Number of videos is a multiple of self._MAX_RESULTS                break
            # Extract video identifiers            ids_in_page = []            for entry in response['feed']['entry']:                ids_in_page.append(entry['id']['$t'].split('/')[-1])            video_ids.extend(ids_in_page)
            # A little optimization - if current page is not            # "full", ie. does not contain PAGE_SIZE video ids then            # we can assume that this page is the last one - there            # are no more ids on further pages - no need to query            # again.
            if len(ids_in_page) < self._GDATA_PAGE_SIZE:                break
        url_results = [            self.url_result(video_id, 'Youtube', video_id=video_id)            for video_id in video_ids]        return self.playlist_result(url_results, playlist_title=username)

class YoutubeSearchIE(SearchInfoExtractor):    IE_DESC = u'YouTube.com searches'    _API_URL = 'https://gdata.youtube.com/feeds/api/videos?q=%s&start-index=%i&max-results=50&v=2&alt=jsonc'    _MAX_RESULTS = 1000    IE_NAME = u'youtube:search'    _SEARCH_KEY = 'ytsearch'
    def _get_n_results(self, query, n):        """Get a specified number of results for a query"""
        video_ids = []        pagenum = 0        limit = n
        while (50 * pagenum) < limit:            result_url = self._API_URL % (compat_urllib_parse.quote_plus(query), (50*pagenum)+1)            data_json = self._download_webpage(                result_url, video_id=u'query "%s"' % query,                note=u'Downloading page %s' % (pagenum + 1),                errnote=u'Unable to download API page')            data = json.loads(data_json)            api_response = data['data']
            if 'items' not in api_response:                raise ExtractorError(u'[youtube] No video results')
            new_ids = list(video['id'] for video in api_response['items'])            video_ids += new_ids
            limit = min(n, api_response['totalItems'])            pagenum += 1
        if len(video_ids) > n:            video_ids = video_ids[:n]        videos = [self.url_result(video_id, 'Youtube', video_id=video_id)                  for video_id in video_ids]        return self.playlist_result(videos, query)
class YoutubeSearchDateIE(YoutubeSearchIE):    IE_NAME = YoutubeSearchIE.IE_NAME + ':date'    _API_URL = 'https://gdata.youtube.com/feeds/api/videos?q=%s&start-index=%i&max-results=50&v=2&alt=jsonc&orderby=published'    _SEARCH_KEY = 'ytsearchdate'    IE_DESC = u'YouTube.com searches, newest videos first'
class YoutubeShowIE(InfoExtractor):    IE_DESC = u'YouTube.com (multi-season) shows'    _VALID_URL = r'https?://www\.youtube\.com/show/(.*)'    IE_NAME = u'youtube:show'
    def _real_extract(self, url):        mobj = re.match(self._VALID_URL, url)        show_name = mobj.group(1)        webpage = self._download_webpage(url, show_name, u'Downloading show webpage')        # There's one playlist for each season of the show        m_seasons = list(re.finditer(r'href="(/playlist\?list=.*?)"', webpage))        self.to_screen(u'%s: Found %s seasons' % (show_name, len(m_seasons)))        return [self.url_result('https://www.youtube.com' + season.group(1), 'YoutubePlaylist') for season in m_seasons]

class YoutubeFeedsInfoExtractor(YoutubeBaseInfoExtractor):    """
    Base class for extractors that fetch info from    http://www.youtube.com/feed_ajax    Subclasses must define the _FEED_NAME and _PLAYLIST_TITLE properties.    """
    _LOGIN_REQUIRED = True    # use action_load_personal_feed instead of action_load_system_feed    _PERSONAL_FEED = False
    @property    def _FEED_TEMPLATE(self):        action = 'action_load_system_feed'        if self._PERSONAL_FEED:            action = 'action_load_personal_feed'        return 'http://www.youtube.com/feed_ajax?%s=1&feed_name=%s&paging=%%s' % (action, self._FEED_NAME)
    @property    def IE_NAME(self):        return u'youtube:%s' % self._FEED_NAME
    def _real_initialize(self):        self._login()
    def _real_extract(self, url):        feed_entries = []        paging = 0        for i in itertools.count(1):            info = self._download_webpage(self._FEED_TEMPLATE % paging,                                          u'%s feed' % self._FEED_NAME,                                          u'Downloading page %s' % i)            info = json.loads(info)            feed_html = info['feed_html']            m_ids = re.finditer(r'"/watch\?v=(.*?)["&]', feed_html)            ids = orderedSet(m.group(1) for m in m_ids)            feed_entries.extend(                self.url_result(video_id, 'Youtube', video_id=video_id)                for video_id in ids)            if info['paging'] is None:                break            paging = info['paging']        return self.playlist_result(feed_entries, playlist_title=self._PLAYLIST_TITLE)
class YoutubeSubscriptionsIE(YoutubeFeedsInfoExtractor):    IE_DESC = u'YouTube.com subscriptions feed, "ytsubs" keyword(requires authentication)'    _VALID_URL = r'https?://www\.youtube\.com/feed/subscriptions|:ytsubs(?:criptions)?'    _FEED_NAME = 'subscriptions'    _PLAYLIST_TITLE = u'Youtube Subscriptions'
class YoutubeRecommendedIE(YoutubeFeedsInfoExtractor):    IE_DESC = u'YouTube.com recommended videos, "ytrec" keyword (requires authentication)'    _VALID_URL = r'https?://www\.youtube\.com/feed/recommended|:ytrec(?:ommended)?'    _FEED_NAME = 'recommended'    _PLAYLIST_TITLE = u'Youtube Recommended videos'
class YoutubeWatchLaterIE(YoutubeFeedsInfoExtractor):    IE_DESC = u'Youtube watch later list, "ytwatchlater" keyword (requires authentication)'    _VALID_URL = r'https?://www\.youtube\.com/feed/watch_later|:ytwatchlater'    _FEED_NAME = 'watch_later'    _PLAYLIST_TITLE = u'Youtube Watch Later'    _PERSONAL_FEED = True
class YoutubeHistoryIE(YoutubeFeedsInfoExtractor):    IE_DESC = u'Youtube watch history, "ythistory" keyword (requires authentication)'    _VALID_URL = u'https?://www\.youtube\.com/feed/history|:ythistory'    _FEED_NAME = 'history'    _PERSONAL_FEED = True    _PLAYLIST_TITLE = u'Youtube Watch History'
class YoutubeFavouritesIE(YoutubeBaseInfoExtractor):    IE_NAME = u'youtube:favorites'    IE_DESC = u'YouTube.com favourite videos, "ytfav" keyword (requires authentication)'    _VALID_URL = r'https?://www\.youtube\.com/my_favorites|:ytfav(?:ou?rites)?'    _LOGIN_REQUIRED = True
    def _real_extract(self, url):        webpage = self._download_webpage('https://www.youtube.com/my_favorites', 'Youtube Favourites videos')        playlist_id = self._search_regex(r'list=(.+?)["&]', webpage, u'favourites playlist id')        return self.url_result(playlist_id, 'YoutubePlaylist')

class YoutubeTruncatedURLIE(InfoExtractor):    IE_NAME = 'youtube:truncated_url'    IE_DESC = False  # Do not list    _VALID_URL = r'(?:https?://)?[^/]+/watch\?feature=[a-z_]+$'
    def _real_extract(self, url):        raise ExtractorError(            u'Did you forget to quote the URL? Remember that & is a meta '            u'character in most shells, so you want to put the URL in quotes, '            u'like  youtube-dl '            u'\'http://www.youtube.com/watch?feature=foo&v=BaW_jenozKc\''            u' (or simply  youtube-dl BaW_jenozKc  ).',            expected=True)