Merge 5966b430927997811a99e8b8c7421d37b46045cd into 2b4fbfce25902d557b86b003cf48f738129efce4

thx seproDev, bashonly: yt-dlp/yt-dlp#12748

test/test_youtube_signature.py

@@ -84,6 +84,21 @@ _SIG_TESTS = [
         '2aq0aqSyOoJXtK73m-uME_jv7-pT15gOFC02RFkGMqWpzEICs69VdbwQ0LDp1v7j8xx92efCJlYFYb1sUkkBSPOlPmXgIARw8JQ0qOAOAA',
         '0QJ8wRAIgXmPlOPSBkkUs1bYFYlJCfe29xxAj7v1pDL0QwbdV96sCIEzpWqMGkFR20CFOg51Tp-7vj_EMu-m37KtXJ2OySqa0q',
     ),
+    (
+        'https://www.youtube.com/s/player/643afba4/tv-player-ias.vflset/tv-player-ias.js',
+        '2aq0aqSyOoJXtK73m-uME_jv7-pT15gOFC02RFkGMqWpzEICs69VdbwQ0LDp1v7j8xx92efCJlYFYb1sUkkBSPOlPmXgIARw8JQ0qOAOAA',
+        'AAOAOq0QJ8wRAIgXmPlOPSBkkUs1bYFYlJCfe29xx8j7vgpDL0QwbdV06sCIEzpWqMGkFR20CFOS21Tp-7vj_EMu-m37KtXJoOy1',
+    ),
+    (
+        'https://www.youtube.com/s/player/363db69b/player_ias.vflset/en_US/base.js',
+        '2aq0aqSyOoJXtK73m-uME_jv7-pT15gOFC02RFkGMqWpzEICs69VdbwQ0LDp1v7j8xx92efCJlYFYb1sUkkBSPOlPmXgIARw8JQ0qOAOAA',
+        '0aqSyOoJXtK73m-uME_jv7-pT15gOFC02RFkGMqWpz2ICs6EVdbwQ0LDp1v7j8xx92efCJlYFYb1sUkkBSPOlPmXgIARw8JQ0qOAOAA',
+    ),
+    (
+        'https://www.youtube.com/s/player/4fcd6e4a/player_ias.vflset/en_US/base.js',
+        '2aq0aqSyOoJXtK73m-uME_jv7-pT15gOFC02RFkGMqWpzEICs69VdbwQ0LDp1v7j8xx92efCJlYFYb1sUkkBSPOlPmXgIARw8JQ0qOAOAA',
+        'wAOAOq0QJ8ARAIgXmPlOPSBkkUs1bYFYlJCfe29xx8q7v1pDL0QwbdV96sCIEzpWqMGkFR20CFOg51Tp-7vj_EMu-m37KtXJoOySqa0',
+    ),
 ]
 
 _NSIG_TESTS = [
@@ -153,7 +168,7 @@ _NSIG_TESTS = [
     ),
     (
         'https://www.youtube.com/s/player/c57c113c/player_ias.vflset/en_US/base.js',
-        '-Txvy6bT5R6LqgnQNx', 'dcklJCnRUHbgSg',
+        'M92UUMHa8PdvPd3wyM', '3hPqLJsiNZx7yA',
     ),
     (
         'https://www.youtube.com/s/player/5a3b6271/player_ias.vflset/en_US/base.js',
@@ -173,7 +188,7 @@ _NSIG_TESTS = [
     ),
     (
         'https://www.youtube.com/s/player/cfa9e7cb/player_ias.vflset/en_US/base.js',
-        'qO0NiMtYQ7TeJnfFG2', 'k9cuJDHNS5O7kQ',
+        'aCi3iElgd2kq0bxVbQ', 'QX1y8jGb2IbZ0w',
     ),
     (
         'https://www.youtube.com/s/player/8c7583ff/player_ias.vflset/en_US/base.js',
@@ -231,10 +246,6 @@ _NSIG_TESTS = [
         'https://www.youtube.com/s/player/f6e09c70/player_ias_tce.vflset/en_US/base.js',
         'W9HJZKktxuYoDTqW', 'jHbbkcaxm54',
     ),
-    (
-        'https://www.youtube.com/s/player/643afba4/player_ias.vflset/en_US/base.js',
-        'W9HJZKktxuYoDTqW', 'larxUlagTRAcSw',
-    ),
     (
         'https://www.youtube.com/s/player/e7567ecf/player_ias_tce.vflset/en_US/base.js',
         'Sy4aDGc0VpYRR9ew_', '5UPOT1VhoZxNLQ',
@@ -259,6 +270,22 @@ _NSIG_TESTS = [
         'https://www.youtube.com/s/player/643afba4/tv-player-ias.vflset/tv-player-ias.js',
         'ir9-V6cdbCiyKxhr', '2PL7ZDYAALMfmA',
     ),
+    (
+        'https://www.youtube.com/s/player/643afba4/player_ias.vflset/en_US/base.js',
+        'W9HJZKktxuYoDTqW', 'larxUlagTRAcSw',
+    ),
+    (
+        'https://www.youtube.com/s/player/363db69b/player_ias.vflset/en_US/base.js',
+        'eWYu5d5YeY_4LyEDc', 'XJQqf-N7Xra3gg',
+    ),
+    (
+        'https://www.youtube.com/s/player/4fcd6e4a/player_ias.vflset/en_US/base.js',
+        'o_L251jm8yhZkWtBW', 'lXoxI3XvToqn6A',
+    ),
+    (
+        'https://www.youtube.com/s/player/4fcd6e4a/tv-player-ias.vflset/tv-player-ias.js',
+        'o_L251jm8yhZkWtBW', 'lXoxI3XvToqn6A',
+    ),
 ]
 
 
@@ -271,6 +298,8 @@ class TestPlayerInfo(unittest.TestCase):
             ('https://www.youtube.com/s/player/64dddad9/player-plasma-ias-phone-en_US.vflset/base.js', '64dddad9'),
             ('https://www.youtube.com/s/player/64dddad9/player-plasma-ias-phone-de_DE.vflset/base.js', '64dddad9'),
             ('https://www.youtube.com/s/player/64dddad9/player-plasma-ias-tablet-en_US.vflset/base.js', '64dddad9'),
+            ('https://www.youtube.com/s/player/e7567ecf/player_ias_tce.vflset/en_US/base.js', 'e7567ecf'),
+            ('https://www.youtube.com/s/player/643afba4/tv-player-ias.vflset/tv-player-ias.js', '643afba4'),
             # obsolete
             ('https://www.youtube.com/yts/jsbin/player_ias-vfle4-e03/en_US/base.js', 'vfle4-e03'),
             ('https://www.youtube.com/yts/jsbin/player_ias-vfl49f_g4/en_US/base.js', 'vfl49f_g4'),
@@ -280,8 +309,9 @@ class TestPlayerInfo(unittest.TestCase):
             ('https://s.ytimg.com/yts/jsbin/html5player-en_US-vflXGBaUN.js', 'vflXGBaUN'),
             ('https://s.ytimg.com/yts/jsbin/html5player-en_US-vflKjOTVq/html5player.js', 'vflKjOTVq'),
         )
+        ie = YoutubeIE(FakeYDL({'cachedir': False}))
         for player_url, expected_player_id in PLAYER_URLS:
-            player_id = YoutubeIE._extract_player_info(player_url)
+            player_id = ie._extract_player_info(player_url)
             self.assertEqual(player_id, expected_player_id)
 
 
@@ -301,8 +331,8 @@ class TestSignature(unittest.TestCase):
 def t_factory(name, sig_func, url_pattern):
     def make_tfunc(url, sig_input, expected_sig):
         m = url_pattern.match(url)
-        assert m, '%r should follow URL format' % url
+        assert m, '{0!r} should follow URL format'.format(url)
-        test_id = m.group('id')
+        test_id = re.sub(r'[/.-]', '_', m.group('id') or m.group('compat_id'))
 
         def test_func(self):
             basename = 'player-{0}-{1}.js'.format(name, test_id)
@@ -335,12 +365,16 @@ def n_sig(jscode, sig_input):
 
 
 make_sig_test = t_factory(
-    'signature', signature, re.compile(r'.*(?:-|/player/)(?P<id>[a-zA-Z0-9_-]+)(?:/.+\.js|(?:/watch_as3|/html5player)?\.[a-z]+)$'))
+    'signature', signature,
+    re.compile(r'''(?x)
+        .+/(?P<h5>html5)?player(?(h5)(?:-en_US)?-|/)(?P<id>[a-zA-Z0-9/._-]+)
+        (?(h5)/(?:watch_as3|html5player))?\.js$
+    '''))
 for test_spec in _SIG_TESTS:
     make_sig_test(*test_spec)
 
 make_nsig_test = t_factory(
-    'nsig', n_sig, re.compile(r'.+/player/(?P<id>[a-zA-Z0-9_-]+)/.+.js$'))
+    'nsig', n_sig, re.compile(r'.+/player/(?P<id>[a-zA-Z0-9_/.-]+)\.js$'))
 for test_spec in _NSIG_TESTS:
     make_nsig_test(*test_spec)
 

youtube_dl/extractor/extractors.py

@@ -494,6 +494,11 @@ from .hotstar import (
 )
 from .howcast import HowcastIE
 from .howstuffworks import HowStuffWorksIE
+from .hqporner import (
+    HQPornerIE,
+    HQPornerListIE,
+    HQPornerSearchIE,
+)
 from .hrfernsehen import HRFernsehenIE
 from .hrti import (
     HRTiIE,

youtube_dl/extractor/hqporner.py

@@ -0,0 +1,233 @@
+# coding: utf-8
+from __future__ import unicode_literals
+
+import itertools
+import re
+from string import capwords
+
+from .common import InfoExtractor
+from ..utils import (
+    clean_html,
+    date_from_str,
+    get_element_by_class,
+    get_element_by_id,
+    int_or_none,
+    join_nonempty,
+    parse_duration,
+    strip_or_none,
+    unified_strdate,
+    urljoin,
+)
+
+
+class HQPornerIE(InfoExtractor):
+    _VALID_URL = r'https?://(?:www\.)?hqporner\.com/hdporn/(?P<id>[\d]+)-'
+    _TESTS = [{
+        'url': 'https://hqporner.com/hdporn/110374-looking_for_a_change_of_pace.html',
+        'md5': '7eb7b791a1ce8a619bde603b2dc334b5',
+        'info_dict': {
+            'id': '110374',
+            'ext': 'mp4',
+            'title': 'Looking For A Change Of Pace',
+            'description': 'featuring Myra',
+            'upload_date': '20230227',
+            'age_limit': 18,
+            'tags': list,
+            'categories': list,
+            'duration': 3271,
+            'thumbnail': r're:https?://.*\.jpg',
+        },
+    }, {
+        'url': 'https://hqporner.com/hdporn/86482-all_night_rager.html',
+        'only_matching': True,
+    }]
+
+    def _real_extract(self, url):
+        video_id = self._match_id(url)
+        # some pages need a `referer` to avoid 404
+        webpage = self._download_webpage(url, video_id, headers={'referer': 'https://hqporner.com/?q=porn'})
+
+        # details below video are in a <header> element
+        heading = self._search_regex(r'''(?s)(<header>.+?</section>)\s*</div>''', webpage, 'heading', default='')
+        title = (
+            capwords(clean_html(get_element_by_class('main-h1', heading) or ''))
+            or self._html_search_regex(
+                r'<title\b[^>]*>\s*([^<]+)(?:\s+-\s+HQporner\.com)?\s*</title>',
+                webpage, 'title'))
+        # video details are in a page loaded by this <iframe>
+        player = get_element_by_id('playerWrapper', webpage)
+        player = self._search_regex(
+            r'''<iframe [^>]*\bsrc\s*=\s*('|")(?P<url>(?:(?!\1)\S)+)''',
+            player, 'player iframe', group='url')
+        player = self._download_webpage(urljoin(url, player), video_id, note='Downloading player iframe')
+        # select the complete set of videos
+        player = self._search_regex(
+            r'''\belse\s*\{\s*\$\s*\(\s*('|")#jw\1\s*\)\s*\.\s*html\s*\(\s*(?P<vstr>("|')\s*<video [^>]+>[^)]+</video>\s*\3)''',
+            player, 'video element', group='vstr')
+        # it's a string containing HTML5 video
+        info = self._parse_html5_media_entries(
+            url, self._parse_json(player, video_id), video_id)[0]  # not used now: m3u8_id='hls', m3u8_entry_protocol='m3u8_native', mpd_id='dash')
+        # site offers no timestamp, but may have "however-many date-units ago"
+        upload_date = get_element_by_class('fa-calendar', heading) or ''
+        if upload_date.endswith(' ago'):
+            upload_date = date_from_str('now-' + upload_date[:-len(' ago')].replace(' ', '').replace('one', '1'))
+            if upload_date:
+                upload_date = upload_date.isoformat().replace('-', '')
+        else:
+            # probably ineffective
+            upload_date = unified_strdate(upload_date)
+
+        # utils candidate
+        def tag_list(s, delim=','):
+            return [t for t in map(strip_or_none, s.split(delim)) if t] or None
+
+        desc = self._html_search_meta('description', webpage, default='')
+
+        info.update({
+            'id': video_id,
+            'title': title,
+            'age_limit': 18,
+            'upload_date': upload_date,
+            'description': clean_html(get_element_by_class('icon fa-star-o', heading)),
+            'duration': parse_duration(
+                get_element_by_class('fa-clock-o', heading)
+                or self._search_regex(r'Video duration is\s+([^.]+)', desc, 'duration', default='')),
+            'categories': tag_list(
+                clean_html(self._search_regex(r'(?s)</h3>\s*<p>(.+?)</p>', heading, 'categories', default='').replace('</a>', ','))
+                or self._html_search_meta('keywords', webpage, default='')),
+            'tags': tag_list(self._search_regex(r'Tags [\w\s-]+:\s+([^.]+)', desc, 'tags', default='')),
+        })
+        return info
+
+
+class HQPornerListBaseIE(InfoExtractor):
+
+    # yt-dlp shim
+    @classmethod
+    def _match_valid_url(cls, url):
+        return re.match(cls._VALID_URL, url)
+
+    def _real_extract(self, url):
+        pl_id, pg = self._match_valid_url(url).group('id', 'pg')
+        pg = int_or_none(pg)
+
+        def entries():
+            """
+                Generate the playlist
+                If `pg` is a page number, get the list for that page
+                Otherwise continue from `url` until exhausted
+            """
+            next = url
+            for pnum in itertools.count(start=pg or 1):
+                p_url = urljoin(url, next)
+                first = (pg or 1) == pnum
+                if not p_url and not first:
+                    break
+                page = self._download_webpage(
+                    p_url, pl_id,
+                    note='Downloading page' + ('' if first else (' %d' % pnum)),
+                    fatal=first)
+                if not page:
+                    break
+                for m in re.finditer(
+                        # each entry in a playlist page has a hyperlinked <img> followed by the caption:
+                        # <h3> containing a hyperlinked title, followed by a <span> containing duration
+                        r'''(?sx)
+                            # <img> with thumbnail (extracted), then closing containing <a><div>
+                            (?:<img\b[^>]+\bsrc\s*=\s*("|')(?P<thm>(?:(?!\1).)+)\1[^>]*>.*?)?
+                            # caption: extract href and title
+                            <h3\b[^>]+\bclass\s*=\s*("|')(?:(?:(?!\3).)+\s)*?meta-data-title(?:\s(?:(?!\3).)+)*\3[^>]*>\s*
+                                <a\b[^>]+\bhref\b=("|')(?P<url>(?:(?!\4).)+)\4[^>]*>(?P<ttl>[^<]*)</a>\s*
+                            </h3>\s*
+                            # extract duration
+                            (?:<span\b[^>]+\bclass\s*=\s*("|')(?:(?:(?!\7).)+\s)*?fa-clock-o(?:\s(?:(?!\7).)+)*\7[^>]*>(?P<dur>[^<]+)</span>)?
+                        ''', page):
+                    a_url = self._proto_relative_url(urljoin(url, m.group('url')))
+                    if a_url:
+                        res = self.url_result(a_url, video_title=capwords(clean_html(m.group('ttl')) or '') or None)
+                        res.update({
+                            'duration': parse_duration(m.group('dur')),
+                            'thumbnail': self._proto_relative_url(urljoin(a_url, m.group('thm'))),
+                        })
+                        yield res
+                if pg is not None:
+                    break
+                # next is the last link in the pagination block, unless that's the current URL
+                maybe_next = urljoin(url, self._search_regex(
+                    r'''(?s)<a\b[^>]+\bhref\s*=\s*("|')(?P<url>(?:(?!\1).)+)\1[^>]*>[^>]*</a>\s*</li>\s*$''',
+                    get_element_by_class('pagination', page) or '', 'next page',
+                    group='url', default=None))
+                next = maybe_next if maybe_next != next else None
+
+        return self.playlist_result(entries(), playlist_id=join_nonempty(pl_id, pg, delim=':'))
+
+    @staticmethod
+    def _set_title(info):
+        pl_id, _, pg = info['id'].rpartition(':')
+        if not pl_id:
+            pl_id = pg
+            pg = None
+        info['title'] = pl_id.replace('/', ': ')
+        if pg:
+            info['title'] += ' [%s]' % (pg, )
+
+
+class HQPornerListIE(HQPornerListBaseIE):
+
+    _VALID_URL = r'https?://(?:www\.)?hqporner\.com/(?P<id>(?:top|(?:category|actress)/[^/]+))(?:/(?P<pg>\d+))?'
+    _TESTS = [{
+        'url': 'https://hqporner.com/category/beach-porn',
+        'info_dict': {
+            'id': 'category/beach-porn',
+            'title': 'Category: beach-porn',
+        },
+        'playlist_mincount': 250,
+    }, {
+        'url': 'https://hqporner.com/category/beach-porn/2',
+        'info_dict': {
+            'id': 'category/beach-porn:2',
+            'title': 'Category: beach-porn [2]',
+        },
+        'playlist_count': 50,
+    }, {
+        'url': 'https://hqporner.com/actress/mary/1',
+        'info_dict': {
+            'id': 'actress/mary:1',
+            'title': 'Actress: mary [1]',
+        },
+        'playlist_count': 50,
+    },
+    ]
+
+    def _real_extract(self, url):
+        res = super(HQPornerListIE, self)._real_extract(url)
+        self._set_title(res)
+        res['title'] = res['title'].capitalize()
+        return res
+
+
+class HQPornerSearchIE(HQPornerListBaseIE):
+
+    _VALID_URL = r'https?://(?:www\.)?hqporner\.com/\?q=(?P<id>[^&]+)(?:&p=(?P<pg>\d+))?'
+    _TESTS = [{
+        'url': 'https://hqporner.com/?q=french',
+        'info_dict': {
+            'id': 'french',
+            'title': 'Searching: french',
+        },
+        'playlist_mincount': 250,
+    }, {
+        'url': 'https://hqporner.com/?q=french&p=2',
+        'info_dict': {
+            'id': 'french:2',
+            'title': 'Searching: french [2]',
+        },
+        'playlist_count': 50,
+    },
+    ]
+
+    def _real_extract(self, url):
+        res = super(HQPornerSearchIE, self)._real_extract(url)
+        self._set_title(res)
+        res['title'] = 'Searching: ' + res['title']
+        return res

youtube_dl/extractor/youtube.py

@@ -692,9 +692,9 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
         'invidious': '|'.join(_INVIDIOUS_SITES),
     }
     _PLAYER_INFO_RE = (
-        r'/s/player/(?P<id>[a-zA-Z0-9_-]{8,})//(?:tv-)?player',
+        r'/s/player/(?P<id>[a-zA-Z0-9_-]{8,})/(?:tv-)?player',
-        r'/(?P<id>[a-zA-Z0-9_-]{8,})/player(?:_ias\.vflset(?:/[a-zA-Z]{2,3}_[a-zA-Z]{2,3})?|-plasma-ias-(?:phone|tablet)-[a-z]{2}_[A-Z]{2}\.vflset)/base\.js$',
+        r'/(?P<id>[a-zA-Z0-9_-]{8,})/player(?:_ias(?:_tce)?\.vflset(?:/[a-zA-Z]{2,3}_[a-zA-Z]{2,3})?|-plasma-ias-(?:phone|tablet)-[a-z]{2}_[A-Z]{2}\.vflset)/base\.js$',
-        r'\b(?P<id>vfl[a-zA-Z0-9_-]+)\b.*?\.js$',
+        r'\b(?P<id>vfl[a-zA-Z0-9_-]{6,})\b.*?\.js$',
     )
     _SUBTITLE_FORMATS = ('json3', 'srv1', 'srv2', 'srv3', 'ttml', 'vtt')
 
@@ -1626,15 +1626,13 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
         """ Return a string representation of a signature """
         return '.'.join(compat_str(len(part)) for part in example_sig.split('.'))
 
-    @classmethod
+    def _extract_player_info(self, player_url):
-    def _extract_player_info(cls, player_url):
+        try:
-        for player_re in cls._PLAYER_INFO_RE:
+            return self._search_regex(
-            id_m = re.search(player_re, player_url)
+                self._PLAYER_INFO_RE, player_url, 'player info', group='id')
-            if id_m:
+        except ExtractorError as e:
-                break
+            raise ExtractorError(
-        else:
+                'Cannot identify player %r' % (player_url,), cause=e)
-            raise ExtractorError('Cannot identify player %r' % player_url)
-        return id_m.group('id')
 
     def _load_player(self, video_id, player_url, fatal=True, player_id=None):
         if not player_id:
@@ -1711,6 +1709,23 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                 '    return %s\n') % (signature_id_tuple, expr_code)
         self.to_screen('Extracted signature function:\n' + code)
 
+    def _extract_sig_fn(self, jsi, funcname):
+        var_ay = self._search_regex(
+            r'''(?x)
+                (?:\*/|\{|\n|^)\s*(?:'[^']+'\s*;\s*)
+                    (var\s*[\w$]+\s*=\s*(?:
+                        ('|")(?:\\\2|(?!\2).)+\2\s*\.\s*split\(\s*('|")\W+\3\s*\)|
+                        \[\s*(?:('|")(?:\\\4|(?!\4).)*\4\s*(?:(?=\])|,\s*))+\]
+                    ))(?=\s*[,;])
+            ''', jsi.code, 'useful values', default='')
+
+        sig_fn = jsi.extract_function_code(funcname)
+
+        if var_ay:
+            sig_fn = (sig_fn[0], ';\n'.join((var_ay, sig_fn[1])))
+
+        return sig_fn
+
     def _parse_sig_js(self, jscode):
         # Examples where `sig` is funcname:
         # sig=function(a){a=a.split(""); ... ;return a.join("")};
@@ -1736,8 +1751,12 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
             jscode, 'Initial JS player signature function name', group='sig')
 
         jsi = JSInterpreter(jscode)
-        initial_function = jsi.extract_function(funcname)
+
-        return lambda s: initial_function([s])
+        initial_function = self._extract_sig_fn(jsi, funcname)
+
+        func = jsi.extract_function_from_code(*initial_function)
+
+        return lambda s: func([s])
 
     def _cached(self, func, *cache_id):
         def inner(*args, **kwargs):
@@ -1856,15 +1875,9 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
 
     def _extract_n_function_code_jsi(self, video_id, jsi, player_id=None):
 
-        var_ay = self._search_regex(
-            r'(?:[;\s]|^)\s*(var\s*[\w$]+\s*=\s*"(?:\\"|[^"])+"\s*\.\s*split\("\W+"\))(?=\s*[,;])',
-            jsi.code, 'useful values', default='')
-
         func_name = self._extract_n_function_name(jsi.code)
 
-        func_code = jsi.extract_function_code(func_name)
+        func_code = self._extract_sig_fn(jsi, func_name)
-        if var_ay:
-            func_code = (func_code[0], ';\n'.join((var_ay, func_code[1])))
 
         if player_id:
             self.cache.store('youtube-nsig', player_id, func_code)
@@ -2136,7 +2149,8 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                     video_details = merge_dicts(*traverse_obj(
                         (player_response, api_player_response),
                         (Ellipsis, 'videoDetails', T(dict))))
-                    player_response.update(api_player_response or {})
+                    player_response.update(filter_dict(
+                        api_player_response or {}, cndn=lambda k, _: k != 'captions'))
                     player_response['videoDetails'] = video_details
 
         def is_agegated(playability):
@@ -2566,8 +2580,8 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
         }
 
         pctr = traverse_obj(
-            player_response,
+            (player_response, api_player_response),
-            ('captions', 'playerCaptionsTracklistRenderer', T(dict)))
+            (Ellipsis, 'captions', 'playerCaptionsTracklistRenderer', T(dict)))
         if pctr:
             def process_language(container, base_url, lang_code, query):
                 lang_subs = []
@@ -2584,20 +2598,21 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
             def process_subtitles():
                 subtitles = {}
                 for caption_track in traverse_obj(pctr, (
-                        'captionTracks', lambda _, v: v.get('baseUrl'))):
+                        Ellipsis, 'captionTracks', lambda _, v: (
+                            v.get('baseUrl') and v.get('languageCode')))):
                     base_url = self._yt_urljoin(caption_track['baseUrl'])
                     if not base_url:
                         continue
+                    lang_code = caption_track['languageCode']
                     if caption_track.get('kind') != 'asr':
-                        lang_code = caption_track.get('languageCode')
-                        if not lang_code:
-                            continue
                         process_language(
                             subtitles, base_url, lang_code, {})
                         continue
                     automatic_captions = {}
+                    process_language(
+                        automatic_captions, base_url, lang_code, {})
                     for translation_language in traverse_obj(pctr, (
-                            'translationLanguages', lambda _, v: v.get('languageCode'))):
+                            Ellipsis, 'translationLanguages', lambda _, v: v.get('languageCode'))):
                         translation_language_code = translation_language['languageCode']
                         process_language(
                             automatic_captions, base_url, translation_language_code,

youtube_dl/jsinterp.py

@@ -678,7 +678,7 @@ class JSInterpreter(object):
             return len(obj)
         try:
             return obj[int(idx)] if isinstance(obj, list) else obj[compat_str(idx)]
-        except (TypeError, KeyError, IndexError) as e:
+        except (TypeError, KeyError, IndexError, ValueError) as e:
             # allow_undefined is None gives correct behaviour
             if allow_undefined or (
                     allow_undefined is None and not isinstance(e, TypeError)):
@@ -1038,6 +1038,10 @@ class JSInterpreter(object):
                     left_val = self._index(left_val, idx)
             if isinstance(idx, float):
                 idx = int(idx)
+            if isinstance(left_val, list) and len(left_val) <= int_or_none(idx, default=-1):
+                # JS Array is a sparsely assignable list
+                # TODO: handle extreme sparsity without memory bloat, eg using auxiliary dict
+                left_val.extend((idx - len(left_val) + 1) * [JS_Undefined])
             left_val[idx] = self._operator(
                 m.group('op'), self._index(left_val, idx) if m.group('op') else None,
                 m.group('expr'), expr, local_vars, allow_recursion)
@@ -1204,9 +1208,10 @@ class JSInterpreter(object):
                 elif member == 'join':
                     assertion(isinstance(obj, list), 'must be applied on a list')
                     assertion(len(argvals) <= 1, 'takes at most one argument')
-                    return (',' if len(argvals) == 0 else argvals[0]).join(
+                    return (',' if len(argvals) == 0 or argvals[0] in (None, JS_Undefined)
-                        ('' if x in (None, JS_Undefined) else _js_toString(x))
+                            else argvals[0]).join(
-                        for x in obj)
+                                ('' if x in (None, JS_Undefined) else _js_toString(x))
+                                for x in obj)
                 elif member == 'reverse':
                     assertion(not argvals, 'does not take any arguments')
                     obj.reverse()
@@ -1364,19 +1369,21 @@ class JSInterpreter(object):
         code, _ = self._separate_at_paren(func_m.group('code'))  # refine the match
         return self.build_arglist(func_m.group('args')), code
 
-    def extract_function(self, funcname):
+    def extract_function(self, funcname, *global_stack):
         return function_with_repr(
-            self.extract_function_from_code(*self.extract_function_code(funcname)),
+            self.extract_function_from_code(*itertools.chain(
+                self.extract_function_code(funcname), global_stack)),
             'F<%s>' % (funcname,))
 
     def extract_function_from_code(self, argnames, code, *global_stack):
         local_vars = {}
 
+        start = None
         while True:
-            mobj = re.search(r'function\((?P<args>[^)]*)\)\s*{', code)
+            mobj = re.search(r'function\((?P<args>[^)]*)\)\s*{', code[start:])
             if mobj is None:
                 break
-            start, body_start = mobj.span()
+            start, body_start = ((start or 0) + x for x in mobj.span())
             body, remaining = self._separate_at_paren(code[body_start - 1:])
             name = self._named_object(local_vars, self.extract_function_from_code(
                 [x.strip() for x in mobj.group('args').split(',')],