[mixch] add support for mixch.tv (#1586)

Authored by: nao20010128nao

yt_dlp/extractor/mixch.py

@@ -0,0 +1,55 @@
+from __future__ import unicode_literals
+
+from .common import InfoExtractor
+from ..utils import (
+    ExtractorError,
+    traverse_obj,
+)
+
+
+class MixchIE(InfoExtractor):
+    IE_NAME = 'mixch'
+    _VALID_URL = r'https?://(?:www\.)?mixch\.tv/u/(?P<id>\d+)'
+
+    TESTS = [{
+        'url': 'https://mixch.tv/u/16236849/live',
+        'skip': 'don\'t know if this live persists',
+        'info_dict': {
+            'id': '16236849',
+            'title': '24配信シェア⭕️投票🙏💦',
+            'comment_count': 13145,
+            'view_count': 28348,
+            'timestamp': 1636189377,
+            'uploader': '🦥伊咲👶🏻#フレアワ',
+            'uploader_id': '16236849',
+        }
+    }, {
+        'url': 'https://mixch.tv/u/16137876/live',
+        'only_matching': True,
+    }]
+
+    def _real_extract(self, url):
+        video_id = self._match_id(url)
+        webpage = self._download_webpage(f'https://mixch.tv/u/{video_id}/live', video_id)
+
+        initial_js_state = self._parse_json(self._search_regex(
+            r'(?m)^\s*window\.__INITIAL_JS_STATE__\s*=\s*(\{.+?\});\s*$', webpage, 'initial JS state'), video_id)
+        if not initial_js_state.get('liveInfo'):
+            raise ExtractorError('Livestream has ended.', expected=True)
+
+        return {
+            'id': video_id,
+            'title': traverse_obj(initial_js_state, ('liveInfo', 'title')),
+            'comment_count': traverse_obj(initial_js_state, ('liveInfo', 'comments')),
+            'view_count': traverse_obj(initial_js_state, ('liveInfo', 'visitor')),
+            'timestamp': traverse_obj(initial_js_state, ('liveInfo', 'created')),
+            'uploader': traverse_obj(initial_js_state, ('broadcasterInfo', 'name')),
+            'uploader_id': video_id,
+            'formats': [{
+                'format_id': 'hls',
+                'url': traverse_obj(initial_js_state, ('liveInfo', 'hls')) or 'https://d1hd0ww6piyb43.cloudfront.net/hls/torte_%s.m3u8' % video_id,
+                'ext': 'mp4',
+                'protocol': 'm3u8',
+            }],
+            'is_live': True,
+        }