Merge 80d03d7e69c6462ad54d51f58a858b1af0ba18a6 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
-        test_id = m.group('id')
+        assert m, '{0!r} should follow URL format'.format(url)
+        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/sbs.py

@@ -2,32 +2,63 @@
 from __future__ import unicode_literals
 
 from .common import InfoExtractor
+from ..compat import (
+    compat_kwargs,
+    compat_str,
+)
 from ..utils import (
-    smuggle_url,
-    ExtractorError,
+    HEADRequest,
+    float_or_none,
+    int_or_none,
+    merge_dicts,
+    parse_duration,
+    parse_iso8601,
+    T,
+    traverse_obj,
+    update_url_query,
+    url_or_none,
 )
 
 
 class SBSIE(InfoExtractor):
     IE_DESC = 'sbs.com.au'
-    _VALID_URL = r'https?://(?:www\.)?sbs\.com\.au/(?:ondemand(?:/video/(?:single/)?|.*?\bplay=|/watch/)|news/(?:embeds/)?video/)(?P<id>[0-9]+)'
+    _VALID_URL = r'''(?x)
+        https?://(?:www\.)?sbs\.com\.au/(?:
+            ondemand(?:
+                /video/(?:single/)?|
+                /(?:movie|tv-program)/[^/]+/|
+                /(?:tv|news)-series/(?:[^/]+/){3}|
+                .*?\bplay=|/watch/
+            )|news/(?:embeds/)?video/
+        )(?P<id>[0-9]+)'''
+    _EMBED_REGEX = [r'''(?x)]
+            (?:
+                <meta\s+property="og:video"\s+content=|
+                <iframe[^>]+?src=
+            )
+            ("|\')(?P<url>https?://(?:www\.)?sbs\.com\.au/ondemand/video/.+?)\1''']
 
     _TESTS = [{
-        # Original URL is handled by the generic IE which finds the iframe:
-        # http://www.sbs.com.au/thefeed/blog/2014/08/21/dingo-conservation
+        # Exceptional unrestricted show for testing, thanks SBS,
+        # from an iframe of this page, handled by the generic IE, now 404:
+        # http://www.sbs.com.au/thefeed/blog/2014/08/21/dingo-conservation, but replaced by
+        # https://www.sbs.com.au/programs/video/320403011771/Dingo-Conservation-The-Feed
         'url': 'http://www.sbs.com.au/ondemand/video/single/320403011771/?source=drupal&vertical=thefeed',
-        'md5': '3150cf278965eeabb5b4cea1c963fe0a',
+        'md5': 'e49d0290cb4f40d893b8dfe760dce6b0',
         'info_dict': {
-            'id': '_rFBPRPO4pMR',
+            'id': '320403011771',  # formerly '_rFBPRPO4pMR', no longer found
             'ext': 'mp4',
             'title': 'Dingo Conservation (The Feed)',
             'description': 'md5:f250a9856fca50d22dec0b5b8015f8a5',
-            'thumbnail': r're:http://.*\.jpg',
+            'thumbnail': r're:https?://.*\.jpg',
             'duration': 308,
             'timestamp': 1408613220,
             'upload_date': '20140821',
             'uploader': 'SBSC',
+            'tags': 'mincount:10',
+            'categories': 'count:2',
         },
+        'expected_warnings': ['Unable to download JSON metadata'],
     }, {
         'url': 'http://www.sbs.com.au/ondemand/video/320403011771/Dingo-Conservation-The-Feed',
         'only_matching': True,
@@ -46,33 +77,146 @@ class SBSIE(InfoExtractor):
     }, {
         'url': 'https://www.sbs.com.au/ondemand/watch/1698704451971',
         'only_matching': True,
+    }, {
+        'url': 'https://www.sbs.com.au/ondemand/movie/coherence/1469404227931',
+        'only_matching': True,
+    }, {
+        'note': 'Live stream',
+        'url': 'https://www.sbs.com.au/ondemand/video/1726824003663/sbs-24x7-live-stream-nsw',
+        'only_matching': True,
+    }, {
+        'url': 'https://www.sbs.com.au/ondemand/news-series/dateline/dateline-2022/dateline-s2022-ep26/2072245827515',
+        'only_matching': True,
+    }, {
+        'url': 'https://www.sbs.com.au/ondemand/tv-series/the-handmaids-tale/season-5/the-handmaids-tale-s5-ep1/2065631811776',
+        'only_matching': True,
+    }, {
+        'url': 'https://www.sbs.com.au/ondemand/tv-program/autun-romes-forgotten-sister/2116212803602',
+        'only_matching': True,
     }]
 
+    # change default entry_protocol kwarg for _extract_smil_formats()
+    # TODO: ..._and_subtitles()
+    def _extract_m3u8_formats(self, m3u8_url, video_id, *args, **kwargs):
+        # ext, entry_protocol, ...
+        entry_protocol = kwargs.get('entry_protocol')
+        if not entry_protocol and len(args) <= 1:
+            kwargs['entry_protocol'] = 'm3u8_native'
+            kwargs = compat_kwargs(kwargs)
+
+        return super(SBSIE, self)._extract_m3u8_formats(m3u8_url, video_id, *args, **kwargs)
+
+    _GEO_COUNTRIES = ['AU']
+    # naming for exportability
+    AUS_TV_PARENTAL_GUIDELINES = {
+        'P': 0,
+        'C': 7,
+        'G': 0,
+        'PG': 0,
+        'M': 14,
+        'MA15+': 15,
+        'AV15+': 15,
+        'MAV15+': 15,
+        'R18+': 18,
+        'NC': 0,  # not classified (unofficial, used by SBS)
+    }
+    _PLAYER_API = 'https://www.sbs.com.au/api/v3'
+    _CATALOGUE_API = 'https://catalogue.pr.sbsod.com/'
+    _VOD_BASE_URL = 'https://sbs-vod-prod-01.akamaized.net/'
+
+    def _call_api(self, video_id, path, query=None, data=None, headers=None, fatal=True):
+        return self._download_json(update_url_query(
+            self._CATALOGUE_API + path, query),
+            video_id, headers=headers or {}, fatal=fatal) or {}
+
+    def _get_smil_url(self, video_id):
+        return update_url_query(
+            self._PLAYER_API + 'video_smil', {'id': video_id})
+
+    def _get_player_data(self, video_id, headers=None, fatal=False):
+        return self._download_json(update_url_query(
+            self._PLAYER_API + 'video_stream', {'id': video_id, 'context': 'tv'}),
+            video_id, headers=headers or {}, fatal=fatal) or {}
+
     def _real_extract(self, url):
         video_id = self._match_id(url)
-        player_params = self._download_json(
-            'http://www.sbs.com.au/api/video_pdkvars/id/%s?form=json' % video_id, video_id)
+        # get media links directly though later metadata may contain contentUrl
+        formats, subtitles = self._extract_smil_formats(  # self._extract_smil_formats_and_subtitles(
+            self._get_smil_url(video_id), video_id, fatal=False), {}
 
-        error = player_params.get('error')
-        if error:
-            error_message = 'Sorry, The video you are looking for does not exist.'
-            video_data = error.get('results') or {}
-            error_code = error.get('errorCode')
-            if error_code == 'ComingSoon':
-                error_message = '%s is not yet available.' % video_data.get('title', '')
-            elif error_code in ('Forbidden', 'intranetAccessOnly'):
-                error_message = 'Sorry, This video cannot be accessed via this website'
-            elif error_code == 'Expired':
-                error_message = 'Sorry, %s is no longer available.' % video_data.get('title', '')
-            raise ExtractorError('%s said: %s' % (self.IE_NAME, error_message), expected=True)
+        if not formats:
+            urlh = self._request_webpage(
+                HEADRequest(self._VOD_BASE_URL), video_id,
+                note='Checking geo-restriction', fatal=False, expected_status=403)
+            if urlh:
+                error_reasons = urlh.headers.get_all('x-error-reason') or []
+                if 'geo-blocked' in error_reasons:
+                    self.raise_geo_restricted(countries=self._GEO_COUNTRIES)
 
-        urls = player_params['releaseUrls']
-        theplatform_url = (urls.get('progressive') or urls.get('html')
-                           or urls.get('standard') or player_params['relatedItemsURL'])
+        self._sort_formats(formats)
 
-        return {
-            '_type': 'url_transparent',
-            'ie_key': 'ThePlatform',
+        # try for metadata from the same source
+        player_data = self._get_player_data(video_id, fatal=False)
+        media = traverse_obj(player_data, 'video_object', T(dict)) or {}
+
+        # get, or add, metadata from catalogue
+        media.update(self._call_api(video_id, 'mpx-media/' + video_id, fatal=not media))
+
+        def txt_or_none(s):
+            return (s.strip() or None) if isinstance(s, compat_str) else None
+
+        # expected_type fn for thumbs
+        def mk_thumb(t):
+            u = url_or_none(t.get('contentUrl'))
+            return u and {
+                'id': t.get('name'),
+                'url': u,
+                'width': int_or_none(t.get('width')),
+                'height': int_or_none(t.get('height')),
+            }
+
+        # may be numeric or timecoded
+        def really_parse_duration(d):
+            result = float_or_none(d)
+            if result is None:
+                result = parse_duration(d)
+            return result
+
+        # For named episodes, use the catalogue's title to set episode, rather than generic 'Episode N'.
+        if traverse_obj(media, ('partOfSeries', T(dict))):
+            media['epName'] = traverse_obj(media, 'title')
+
+        str = txt_or_none  # instant compat
+        return merge_dicts({
             'id': video_id,
-            'url': smuggle_url(self._proto_relative_url(theplatform_url), {'force_smil_url': True}),
-        }
+        }, traverse_obj(media, {
+            'title': ('name', T(str)),
+            'description': ('description', T(str)),
+            'channel': ('taxonomy', 'channel', 'name', T(str)),
+            'series': ((('partOfSeries', 'name'), 'seriesTitle'), T(str)),
+            'series_id': ((('partOfSeries', 'uuid'), 'seriesID'), T(str)),
+            'season_number': (('partOfSeries', None), 'seasonNumber', T(int_or_none)),
+            'episode': ('epName', T(str)),
+            'episode_number': ('episodeNumber', T(int_or_none)),
+            'timestamp': (('datePublished', ('publication', 'startDate')), T(parse_iso8601)),
+            'release_year': ('releaseYear', T(int_or_none)),
+            'duration': ('duration', T(really_parse_duration)),
+            'is_live': ('liveStream', T(bool)),
+            'age_limit': ('classificationID', 'contentRating',
+                          T(lambda x: self.AUS_TV_PARENTAL_GUIDELINES.get(x, '').upper() or None)),  # dict.get is unhashable in py3.7
+        }, get_all=False), traverse_obj(media, {
+            'categories': ((('genres', Ellipsis),
+                            ('taxonomy', ((('genre', 'subgenre'), Ellipsis, 'name'), 'useType'))),
+                           T(str)),
+            'tags': ((((('keywords',),
+                        ('consumerAdviceTexts', ('sbsSubCertification', 'consumerAdvice'))),
+                       Ellipsis),
+                     ('taxonomy', ('era', 'location', 'section', 'subject', 'theme'),
+                      Ellipsis, 'name')),
+                     T(str)),
+            'thumbnails': ('thumbnails', lambda _, v: v['contentUrl'], T(mk_thumb)),
+        }), {
+            'formats': formats,
+            'subtitles': subtitles,
+            'uploader': 'SBSC',
+        }, rev=True)

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'/(?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$',
-        r'\b(?P<id>vfl[a-zA-Z0-9_-]+)\b.*?\.js$',
+        r'/s/player/(?P<id>[a-zA-Z0-9_-]{8,})/(?:tv-)?player',
+        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$',
+        r'\b(?P<id>vfl[a-zA-Z0-9_-]{6,})\b.*?\.js$',
     )
     _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(cls, player_url):
-        for player_re in cls._PLAYER_INFO_RE:
-            id_m = re.search(player_re, player_url)
-            if id_m:
-                break
-        else:
-            raise ExtractorError('Cannot identify player %r' % player_url)
-        return id_m.group('id')
+    def _extract_player_info(self, player_url):
+        try:
+            return self._search_regex(
+                self._PLAYER_INFO_RE, player_url, 'player info', group='id')
+        except ExtractorError as e:
+            raise ExtractorError(
+                'Cannot identify player %r' % (player_url,), cause=e)
 
     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)
-        if var_ay:
-            func_code = (func_code[0], ';\n'.join((var_ay, func_code[1])))
+        func_code = self._extract_sig_fn(jsi, func_name)
 
         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,
-            ('captions', 'playerCaptionsTracklistRenderer', T(dict)))
+            (player_response, api_player_response),
+            (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(
-                        ('' if x in (None, JS_Undefined) else _js_toString(x))
-                        for x in obj)
+                    return (',' if len(argvals) == 0 or argvals[0] in (None, JS_Undefined)
+                            else argvals[0]).join(
+                                ('' 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(',')],