Merge fad516e22e58763ce0feab1034cc0c7aa2da184c 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/tver.py

@@ -4,58 +4,229 @@ from __future__ import unicode_literals
 import re
 
 from .common import InfoExtractor
-from ..compat import compat_str
+from ..compat import (
-from ..utils import (
+    compat_kwargs,
-    int_or_none,
+    compat_str,
-    remove_start,
-    smuggle_url,
-    try_get,
 )
+from ..utils import (
+    ExtractorError,
+    int_or_none,
+    smuggle_url,
+    str_or_none,
+)
+
+try:
+    from ..utils import traverse_obj
+except ImportError:
+    from ..compat import compat_collections_abc
+
+    def traverse_obj(obj, *path_list, **kw):
+        ''' Traverse nested list/dict/tuple'''
+
+        # parameter defaults
+        default = kw.get('default')
+        expected_type = kw.get('expected_type')
+        get_all = kw.get('get_all', True)
+        casesense = kw.get('casesense', True)
+        is_user_input = kw.get('is_user_input', False)
+        traverse_string = kw.get('traverse_string', False)
+
+        def variadic(x, allowed_types=(compat_str, bytes)):
+            return x if isinstance(x, compat_collections_abc.Iterable) and not isinstance(x, allowed_types) else (x,)
+
+        def listish(l):
+            return isinstance(l, (list, tuple))
+
+        def from_iterable(iterables):
+            # chain.from_iterable(['ABC', 'DEF']) --> A B C D E F
+            for it in iterables:
+                for element in it:
+                    yield element
+
+        class Nonlocal:
+            pass
+        nl = Nonlocal()
+
+        if not casesense:
+            _lower = lambda k: (k.lower() if isinstance(k, compat_str) else k)
+            path_list = (map(_lower, variadic(path)) for path in path_list)
+
+        def _traverse_obj(obj, path, _current_depth=0):
+            path = tuple(variadic(path))
+            for i, key in enumerate(path):
+                if obj is None:
+                    return None
+                if listish(key):
+                    obj = [_traverse_obj(obj, sub_key, _current_depth) for sub_key in key]
+                    key = Ellipsis
+                if key is Ellipsis:
+                    obj = (obj.values() if isinstance(obj, dict)
+                           else obj if listish(obj)
+                           else compat_str(obj) if traverse_string else [])
+                    _current_depth += 1
+                    nl.depth = max(nl.depth, _current_depth)
+                    return [_traverse_obj(inner_obj, path[i + 1:], _current_depth) for inner_obj in obj]
+                elif callable(key):
+                    if listish(obj):
+                        obj = enumerate(obj)
+                    elif isinstance(obj, dict):
+                        obj = obj.items()
+                    else:
+                        if not traverse_string:
+                            return None
+                        obj = str(obj)
+                    _current_depth += 1
+                    nl.depth = max(nl.depth, _current_depth)
+                    return [_traverse_obj(v, path[i + 1:], _current_depth) for k, v in obj if key(k)]
+                elif isinstance(obj, dict) and not (is_user_input and key == ':'):
+                    obj = (obj.get(key) if casesense or (key in obj)
+                           else next((v for k, v in obj.items() if _lower(k) == key), None))
+                else:
+                    if is_user_input:
+                        key = (int_or_none(key) if ':' not in key
+                               else slice(*map(int_or_none, key.split(':'))))
+                        if key == slice(None):
+                            return _traverse_obj(obj, tuple([Ellipsis] + list(path[i + 1:])), _current_depth)
+                    if not isinstance(key, (int, slice)):
+                        return None
+                    if not listish(obj):
+                        if not traverse_string:
+                            return None
+                        obj = compat_str(obj)
+                    try:
+                        obj = obj[key]
+                    except IndexError:
+                        return None
+            return obj
+
+        if isinstance(expected_type, type):
+            type_test = lambda val: val if isinstance(val, expected_type) else None
+        elif expected_type is not None:
+            type_test = expected_type
+        else:
+            type_test = lambda val: val
+
+        for path in path_list:
+            nl.depth = 0
+            val = _traverse_obj(obj, path)
+            if val is not None:
+                if nl.depth:
+                    for _ in range(nl.depth - 1):
+                        val = from_iterable(v for v in val if v is not None)
+                    val = [v for v in map(type_test, val) if v is not None]
+                    if val:
+                        return val if get_all else val[0]
+                else:
+                    val = type_test(val)
+                    if val is not None:
+                        return val
+        return default
 
 
 class TVerIE(InfoExtractor):
-    _VALID_URL = r'https?://(?:www\.)?tver\.jp/(?P<path>(?:corner|episode|feature)/(?P<id>f?\d+))'
+    _VALID_URL = r'https?://(?:www\.)?tver\.jp/(?:(?P<type>lp|corner|series|episodes?|feature|tokyo2020/video)/)+(?P<id>[a-zA-Z0-9]+)'
     # videos are only available for 7 days
     _TESTS = [{
-        'url': 'https://tver.jp/corner/f0062178',
+        'skip': 'videos are only available for 7 days',
+        'url': 'https://tver.jp/episodes/ephss8yveb',
+        'info_dict': {
+            'id': 'ref:af03de03-21ac-4b98-a53b-9ffd9b102e92',
+            'ext': 'mp4',
+            'title': '#44　料理と値段と店主にびっくり　オモてなしすぎウマい店　2時間SP',
+            'description': 'md5:66985373a66fed8ad3cd595a3cfebb13',
+            'upload_date': '20220329',
+            'uploader_id': '4394098882001',
+            'timestamp': 1648527032,
+        },
+        'add_ie': ['BrightcoveNew'],
+    }, {
+        'skip': 'videos are only available for 7 days',
+        'url': 'https://tver.jp/lp/episodes/ep6f16g26p',
+        'info_dict': {
+            'id': '6302378806001',
+            'ext': 'mp4',
+            # "April 11 (Mon) 23:06-Broadcast scheduled": sorry but this is "correct"
+            'title': '4月11日(月)23時06分 ~ 放送予定',
+            'description': 'md5:4029cc5f4b1e8090dfc5b7bd2bc5cd0b',
+            'upload_date': '20220331',
+            'uploader_id': '3971130137001',
+            'timestamp': 1648696456,
+        },
+        'add_ie': ['BrightcoveNew'],
+    }, {
+        'url': 'https://tver.jp/corner/f0103888',
         'only_matching': True,
     }, {
-        'url': 'https://tver.jp/feature/f0062413',
+        'url': 'https://tver.jp/lp/f0033031',
-        'only_matching': True,
-    }, {
-        'url': 'https://tver.jp/episode/79622438',
-        'only_matching': True,
-    }, {
-        # subtitle = ' '
-        'url': 'https://tver.jp/corner/f0068870',
         'only_matching': True,
     }]
-    _TOKEN = None
     BRIGHTCOVE_URL_TEMPLATE = 'http://players.brightcove.net/%s/default_default/index.html?videoId=%s'
+    _PLATFORM_UID = None
+    _PLATFORM_TOKEN = None
+
+    def _download_json(self, url_or_request, video_id, **kwargs):
+
+        headers = {
+            'Origin': 'https://s.tver.jp',
+            'Referer': 'https://s.tver.jp/',
+        }
+        headers.update(kwargs.get('headers', {}))
+        kwargs.update(compat_kwargs({'headers': headers, }))
+
+        return super(TVerIE, self)._download_json(url_or_request, video_id, **kwargs)
 
     def _real_initialize(self):
-        self._TOKEN = self._download_json(
+        create_response = self._download_json(
-            'https://tver.jp/api/access_token.php', None)['token']
+            'https://platform-api.tver.jp/v2/api/platform_users/browser/create', None,
+            note='Creating session', data=b'device_type=pc', headers={
+                'Content-Type': 'application/x-www-form-urlencoded',
+            })
+        self._PLATFORM_UID = traverse_obj(create_response, ('result', 'platform_uid'), expected_type=compat_str)
+        self._PLATFORM_TOKEN = traverse_obj(create_response, ('result', 'platform_token'), expected_type=compat_str)
 
     def _real_extract(self, url):
-        path, video_id = re.match(self._VALID_URL, url).groups()
+        video_id = self._match_id(url)
-        main = self._download_json(
-            'https://api.tver.jp/v4/' + path, video_id,
-            query={'token': self._TOKEN})['main']
-        p_id = main['publisher_id']
-        service = remove_start(main['service'], 'ts_')
 
-        r_id = main['reference_id']
+        video_id, video_type = re.match(self._VALID_URL, url).group('id', 'type')
-        if service not in ('tx', 'russia2018', 'sebare2018live', 'gorin'):
+        if video_type not in ('episode', 'episodes', 'series'):
+            webpage = self._download_webpage(url, video_id, note='Resolving to new URL')
+            video_id = self._match_id(self._search_regex(
+                (r'''canonical['"]\s+href\s*=\s*(?P<q>'|")(?P<url>https?://tver\.jp/(?!(?P=q)).+?)(?P=q)''',
+                 r'&link=(?P<url>https?://tver\.jp/(?!(?P=q)).+?)[?&]'),
+                webpage, 'url regex', group='url'))
+        video_info = self._download_json(
+            'https://statics.tver.jp/content/episode/{0}.json'.format(video_id), video_id,
+            query={'v': '5'})
+        p_id = traverse_obj(video_info, ('video', 'accountID'), expected_type=compat_str)
+        r_id = traverse_obj(video_info, ('video', ('videoRefID', 'videoID')), get_all=False, expected_type=compat_str)
+        if None in (p_id, r_id):
+            raise ExtractorError(
+                'Failed to extract '
+                + ', '.join(
+                    (x[0] for x in (('accountID', p_id), ('videoRefID', r_id), )
+                     if x[1] is None)),
+                expected=False)
+        if not r_id.isdigit():
             r_id = 'ref:' + r_id
-        bc_url = smuggle_url(
+
-            self.BRIGHTCOVE_URL_TEMPLATE % (p_id, r_id),
+        additional_info = self._download_json(
-            {'geo_countries': ['JP']})
+            'https://platform-api.tver.jp/service/api/v1/callEpisode/{0}?require_data=mylist,later[epefy106ur],good[epefy106ur],resume[epefy106ur]'.format(video_id),
+            video_id, fatal=False,
+            query={
+                'platform_uid': self._PLATFORM_UID,
+                'platform_token': self._PLATFORM_TOKEN,
+            }, headers={
+                'x-tver-platform-type': 'web'
+            })
 
         return {
             '_type': 'url_transparent',
-            'description': try_get(main, lambda x: x['note'][0]['text'], compat_str),
+            'title': str_or_none(video_info.get('title')),
-            'episode_number': int_or_none(try_get(main, lambda x: x['ext']['episode_number'])),
+            'description': str_or_none(video_info.get('description')),
-            'url': bc_url,
+            'url': smuggle_url(
+                self.BRIGHTCOVE_URL_TEMPLATE % (p_id, r_id), {'geo_countries': ['JP']}),
+            'series': traverse_obj(
+                additional_info, ('result', ('episode', 'series'), 'content', ('seriesTitle', 'title')),
+                get_all=False, expected_type=compat_str),
             'ie_key': 'BrightcoveNew',
         }

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(',')],