[facebook] add support for group posts with multiple videos(closes #19131)

youtube_dl/extractor/facebook.py

@@ -72,6 +72,7 @@ class FacebookIE(InfoExtractor):
         },
         'skip': 'Requires logging in',
     }, {
+        # data.video
         'url': 'https://www.facebook.com/video.php?v=274175099429670',
         'info_dict': {
             'id': '274175099429670',
@@ -133,6 +134,7 @@ class FacebookIE(InfoExtractor):
         },
     }, {
         # have 1080P, but only up to 720p in swf params
+        # data.video.story.attachments[].media
         'url': 'https://www.facebook.com/cnn/videos/10155529876156509/',
         'md5': '9571fae53d4165bbbadb17a94651dcdc',
         'info_dict': {
@@ -147,6 +149,7 @@ class FacebookIE(InfoExtractor):
         },
     }, {
         # bigPipe.onPageletArrive ... onPageletArrive pagelet_group_mall
+        # data.node.comet_sections.content.story.attachments[].style_type_renderer.attachment.media
         'url': 'https://www.facebook.com/yaroslav.korpan/videos/1417995061575415/',
         'info_dict': {
             'id': '1417995061575415',
@@ -174,6 +177,7 @@ class FacebookIE(InfoExtractor):
             'skip_download': True,
         },
     }, {
+        # data.node.comet_sections.content.story.attachments[].style_type_renderer.attachment.media
         'url': 'https://www.facebook.com/groups/1024490957622648/permalink/1396382447100162/',
         'info_dict': {
             'id': '1396382447100162',
@@ -193,18 +197,23 @@ class FacebookIE(InfoExtractor):
         'url': 'https://www.facebook.com/amogood/videos/1618742068337349/?fref=nf',
         'only_matching': True,
     }, {
+        # data.mediaset.currMedia.edges
         'url': 'https://www.facebook.com/ChristyClarkForBC/videos/vb.22819070941/10153870694020942/?type=2&theater',
         'only_matching': True,
     }, {
+        # data.video.story.attachments[].media
         'url': 'facebook:544765982287235',
         'only_matching': True,
     }, {
+        # data.node.comet_sections.content.story.attachments[].style_type_renderer.attachment.media
         'url': 'https://www.facebook.com/groups/164828000315060/permalink/764967300301124/',
         'only_matching': True,
     }, {
+        # data.video.creation_story.attachments[].media
         'url': 'https://zh-hk.facebook.com/peoplespower/videos/1135894589806027/',
         'only_matching': True,
     }, {
+        # data.video
         'url': 'https://www.facebookcorewwwi.onion/video.php?v=274175099429670',
         'only_matching': True,
     }, {
@@ -212,6 +221,7 @@ class FacebookIE(InfoExtractor):
         'url': 'https://www.facebook.com/onlycleverentertainment/videos/1947995502095005/',
         'only_matching': True,
     }, {
+        # data.video
         'url': 'https://www.facebook.com/WatchESLOne/videos/359649331226507/',
         'info_dict': {
             'id': '359649331226507',
@@ -222,6 +232,13 @@ class FacebookIE(InfoExtractor):
         'params': {
             'skip_download': True,
         },
+    }, {
+        # data.node.comet_sections.content.story.attachments[].style_type_renderer.attachment.all_subattachments.nodes[].media
+        'url': 'https://www.facebook.com/100033620354545/videos/106560053808006/',
+        'info_dict': {
+            'id': '106560053808006',
+        },
+        'playlist_count': 2,
     }]
 
     @staticmethod
@@ -330,9 +347,7 @@ class FacebookIE(InfoExtractor):
                 return extract_video_data(try_get(
                     js_data, lambda x: x['jsmods']['instances'], list) or [])
 
-        formats = []
-
-        def extract_dash_manifest(video):
+        def extract_dash_manifest(video, formats):
             dash_manifest = video.get('dash_manifest')
             if dash_manifest:
                 formats.extend(self._parse_mpd_formats(
@@ -351,7 +366,10 @@ class FacebookIE(InfoExtractor):
                 webpage, 'graphql data', default='{}'), video_id, fatal=False) or {}
             for require in (graphql_data.get('require') or []):
                 if require[0] == 'RelayPrefetchedStreamCache':
+                    entries = []
+
                     def parse_graphql_video(video):
+                        formats = []
                         q = qualities(['sd', 'hd'])
                         for (suffix, format_id) in [('', 'sd'), ('_quality_hd', 'hd')]:
                             playable_url = video.get('playable_url' + suffix)
@@ -362,7 +380,7 @@ class FacebookIE(InfoExtractor):
                                 'quality': q(format_id),
                                 'url': playable_url,
                             })
-                        extract_dash_manifest(video)
+                        extract_dash_manifest(video, formats)
                         self._sort_formats(formats)
                         v_id = video.get('videoId') or video.get('id') or video_id
                         info = {
@@ -382,7 +400,12 @@ class FacebookIE(InfoExtractor):
                             })
                         else:
                             info['title'] = description or 'Facebook video #%s' % v_id
-                        return webpage, info
+                        entries.append(info)
+
+                    def parse_attachment(attachment, key='media'):
+                        media = attachment.get(key) or {}
+                        if media.get('__typename') == 'Video':
+                            return parse_graphql_video(media)
 
                     data = try_get(require, lambda x: x[3][1]['__bbox']['result']['data'], dict) or {}
 
@@ -392,13 +415,22 @@ class FacebookIE(InfoExtractor):
                         lambda x: x['node']['comet_sections']['content']['story']['attachments']
                     ], list) or []
                     for attachment in attachments:
-                        media = attachment.get('media') or try_get(attachment, lambda x: x['style_type_renderer']['attachment']['media'], dict) or {}
-                        if media.get('__typename') == 'Video':
-                            return parse_graphql_video(media)
+                        attachment = try_get(attachment, lambda x: x['style_type_renderer']['attachment'], dict) or attachment
+                        nodes = try_get(attachment, lambda x: x['all_subattachments']['nodes'], list) or []
+                        for node in nodes:
+                            parse_attachment(node)
+                        parse_attachment(attachment)
 
+                    edges = try_get(data, lambda x: x['mediaset']['currMedia']['edges'], list) or []
+                    for edge in edges:
+                        parse_attachment(edge, key='node')
+
+                    if not entries:
                         video = data.get('video') or {}
                         if video:
-                        return parse_graphql_video(video)
+                            parse_graphql_video(video)
+
+                    return webpage, self.playlist_result(entries, video_id)
 
         if not video_data:
             if not fatal_if_no_video:
@@ -440,6 +472,7 @@ class FacebookIE(InfoExtractor):
         if not video_data:
             raise ExtractorError('Cannot parse data')
 
+        formats = []
         subtitles = {}
         for f in video_data:
             format_id = f['stream_type']
@@ -459,7 +492,7 @@ class FacebookIE(InfoExtractor):
                             'url': src,
                             'preference': preference,
                         })
-            extract_dash_manifest(f[0])
+            extract_dash_manifest(f[0], formats)
             subtitles_src = f[0].get('subtitles_src')
             if subtitles_src:
                 subtitles.setdefault('en', []).append({'url': subtitles_src})