correct getrecordings method

background_subtraction_heat.py

@@ -53,9 +53,9 @@ class RecordingGrouper:
         self.data = data
 
     def getRecordings(self):
-        for uc in self.data.use_cases():
+        for detection in data.detections(self.data.use_cases()):
-            for detection in data.detections(uc):
+            for recording in detection.recordings():
-                return detection.recordings()
+                yield recording
 
     def getRecordingGroups(self):
         groups = []