[utils] `parse_resolution`: Support width-only pattern (#13802)

Authored by: doe1080

test/test_utils.py

@@ -1373,6 +1373,7 @@ class TestUtil(unittest.TestCase):
         self.assertEqual(parse_resolution('pre_1920x1080_post'), {'width': 1920, 'height': 1080})
         self.assertEqual(parse_resolution('ep1x2'), {})
         self.assertEqual(parse_resolution('1920, 1080'), {'width': 1920, 'height': 1080})
+        self.assertEqual(parse_resolution('1920w', lenient=True), {'width': 1920})
 
     def test_parse_bitrate(self):
         self.assertEqual(parse_bitrate(None), None)

yt_dlp/utils/_utils.py

@@ -1875,6 +1875,11 @@ def parse_resolution(s, *, lenient=False):
     if mobj:
         return {'height': int(mobj.group(1)) * 540}
 
+    if lenient:
+        mobj = re.search(r'(?<!\d)(\d{2,5})w(?![a-zA-Z0-9])', s)
+        if mobj:
+            return {'width': int(mobj.group(1))}
+
     return {}