Strip synopsis for extra newline

yt_dlp/extractor/duoplay.py

@@ -2,6 +2,7 @@ from .common import InfoExtractor
 from ..utils import (
     traverse_obj,
     unified_timestamp,
+    strip_or_none,
 )
 
 
@@ -20,10 +21,30 @@ class DuoplayIE(InfoExtractor):
             'upload_date': '20170523',
             'timestamp': 1495567800,
             'series': 'Siberi võmm',
+            'series_id': 4312,
             'season': 'Season 2',
             'season_number': 2,
             'episode': 'Operatsioon "Öö"',
             'episode_number': 12,
+            'episode_id': 24,
+        },
+    }, {
+        'note': 'Empty title',
+        'url': 'https://duoplay.ee/17/uhikarotid?ep=14',
+        'md5': '6aca68be71112314738dd17cced7f8bf',
+        'info_dict': {
+            'id': '17',
+            'ext': 'mp4',
+            'title': 'Episode 14',
+            'thumbnail': r're:https://.+\.jpg(?:\?c=\d+)?$',
+            'description': 'md5:4719b418e058c209def41d48b601276e',
+            'upload_date': '20100916',
+            'timestamp': 1284661800,
+            'series': 'Ühikarotid',
+            'series_id': 17,
+            'season': 'Season 2',
+            'season_number': 2,
+            'episode_id': 14,
         },
     }]
 
@@ -39,13 +60,17 @@ class DuoplayIE(InfoExtractor):
 
         return {
             'id': video_id,
-            'title': traverse_obj(ep, 'subtitle'),
+            # fallback to absolute "episode_id" value
-            'description': traverse_obj(ep, 'synopsis'),
+            'title': traverse_obj(ep, 'subtitle') or f"Episode {traverse_obj(ep, 'episode_id')}",
+            'description': strip_or_none(traverse_obj(ep, 'synopsis')),
             'thumbnail': traverse_obj(ep, ('images', 'original')),
             'formats': self._extract_m3u8_formats(manifest_url, video_id, 'mp4'),
             'timestamp': unified_timestamp(traverse_obj(ep, 'airtime') + ' +0200'),
             'series': traverse_obj(ep, 'title'),
+            'series_id': traverse_obj(ep, 'telecast_id'),
             'season_number': traverse_obj(ep, 'season_id'),
             'episode': traverse_obj(ep, 'subtitle'),
-            'episode_number': traverse_obj(ep, 'episode_nr'),
+            # fallback to absolute "episode_id" value
+            'episode_number': traverse_obj(ep, 'episode_nr') or traverse_obj(ep, 'episode_id'),
+            'episode_id': traverse_obj(ep, 'episode_id'),
         }