Improve BORIS/CowLog compatibility: parsing, schema tolerance, timecodes, and exports

tracker/tests/test_compatibility.py

@@ -127,6 +127,17 @@ def test_load_session_import_payload_supports_cowlog_frame_rate_with_unit(self):
         self.assertEqual(report['frame_rate'], '29.97 fps')
         self.assertAlmostEqual(payload['events'][0]['time'], 10.5005, places=3)
 
+    def test_load_session_import_payload_supports_cowlog_frame_rate_ratio(self):
+        upload = SimpleUploadedFile(
+            'cowlog.txt',
+            b'# fps\t30000/1001\n00:00:10:15\tEat\tNear\n',
+            content_type='text/plain',
+        )
+        payload, report = load_session_import_payload(upload, self.session)
+        self.assertEqual(report['detected_format'], 'cowlog-results-v1')
+        self.assertEqual(report['frame_rate'], '30000/1001')
+        self.assertAlmostEqual(payload['events'][0]['time'], 10.5005, places=3)
+
     def test_load_session_import_payload_supports_cowlog_colon_metadata(self):
         upload = SimpleUploadedFile(
             'cowlog.txt',
@@ -300,6 +311,17 @@ def test_load_session_import_payload_supports_tabular_custom_frame_rate(self):
         self.assertAlmostEqual(payload['events'][0]['time'], 5.2, places=3)
         self.assertAlmostEqual(payload['events'][1]['time'], 8.4, places=3)
 
+    def test_load_session_import_payload_supports_tabular_ratio_frame_rate(self):
+        upload = SimpleUploadedFile(
+            'boris_rows.csv',
+            b'time,stop,behavior,frame_rate\n00:00:05:10,00:00:08:20,Stand,30000/1001\n',
+            content_type='text/csv',
+        )
+        payload, report = load_session_import_payload(upload, self.session)
+        self.assertEqual(report['detected_format'], 'boris-tabular-csv-v1')
+        self.assertAlmostEqual(payload['events'][0]['time'], 5.3336, places=3)
+        self.assertAlmostEqual(payload['events'][1]['time'], 8.6673, places=3)
+
     def test_load_session_import_payload_supports_state_duration_column(self):
         upload = SimpleUploadedFile(
             'boris_rows.csv',

tracker/views.py

@@ -692,7 +692,18 @@ def _normalize_frame_rate_token(value: str | float | Decimal | None) -> Decimal:
         return Decimal('25')
     if isinstance(value, Decimal):
         return value if value > 0 else Decimal('25')
-    match = re.search(r'[-+]?\d+(?:[.,]\d+)?', str(value))
+    token = str(value).strip()
+    ratio_match = re.search(
+        r'(?P<num>[-+]?\d+(?:[.,]\d+)?)\s*/\s*(?P<den>[-+]?\d+(?:[.,]\d+)?)', token
+    )
+    if ratio_match:
+        numerator = _decimal(ratio_match.group('num').replace(',', '.'), default='25')
+        denominator = _decimal(ratio_match.group('den').replace(',', '.'), default='1')
+        if denominator > 0:
+            ratio = numerator / denominator
+            if ratio > 0:
+                return ratio
+    match = re.search(r'[-+]?\d+(?:[.,]\d+)?', token)
     if not match:
         return Decimal('25')
     parsed = _decimal(match.group(0), default='25')