[ie/S4C] Add extractor (#7730)

Authored by: ifan-t

yt_dlp/extractor/_extractors.py

@@ -1709,6 +1709,7 @@ from .ruv import (
     RuvIE,
     RuvSpilaIE
 )
+from .s4c import S4CIE
 from .safari import (
     SafariIE,
     SafariApiIE,

yt_dlp/extractor/s4c.py

@@ -0,0 +1,62 @@
+from .common import InfoExtractor
+from ..utils import traverse_obj
+
+
+class S4CIE(InfoExtractor):
+    _VALID_URL = r'https?://(?:www\.)?s4c\.cymru/clic/programme/(?P<id>\d+)'
+    _TESTS = [{
+        'url': 'https://www.s4c.cymru/clic/programme/861362209',
+        'info_dict': {
+            'id': '861362209',
+            'ext': 'mp4',
+            'title': 'Y Swn',
+            'description': 'md5:f7681a30e4955b250b3224aa9fe70cf0',
+            'duration': 5340
+        },
+    }, {
+        'url': 'https://www.s4c.cymru/clic/programme/856636948',
+        'info_dict': {
+            'id': '856636948',
+            'ext': 'mp4',
+            'title': 'Am Dro',
+            'duration': 2880,
+            'description': 'md5:100d8686fc9a632a0cb2db52a3433ffe',
+        },
+    }]
+
+    def _real_extract(self, url):
+        video_id = self._match_id(url)
+        details = self._download_json(
+            f'https://www.s4c.cymru/df/full_prog_details?lang=e&programme_id={video_id}',
+            video_id, fatal=False)
+
+        filename = self._download_json(
+            'https://player-api.s4c-cdn.co.uk/player-configuration/prod', video_id, query={
+                'programme_id': video_id,
+                'signed': '0',
+                'lang': 'en',
+                'mode': 'od',
+                'appId': 'clic',
+                'streamName': '',
+            }, note='Downloading player config JSON')['filename']
+        m3u8_url = self._download_json(
+            'https://player-api.s4c-cdn.co.uk/streaming-urls/prod', video_id, query={
+                'mode': 'od',
+                'application': 'clic',
+                'region': 'WW',
+                'extra': 'false',
+                'thirdParty': 'false',
+                'filename': filename,
+            }, note='Downloading streaming urls JSON')['hls']
+        formats, subtitles = self._extract_m3u8_formats_and_subtitles(m3u8_url, video_id, 'mp4', m3u8_id='hls')
+
+        return {
+            'id': video_id,
+            'formats': formats,
+            'subtitles': subtitles,
+            **traverse_obj(details, ('full_prog_details', 0, {
+                'title': (('programme_title', 'series_title'), {str}),
+                'description': ('full_billing', {str.strip}),
+                'duration': ('duration', {lambda x: int(x) * 60}),
+            }), get_all=False),
+        }