Fix logical errors

- field migrations require default values
- `clipped` referenced the wrong index for region, since it shifted
- missed an inclusion of `ratio` for detections in `process_frames`
- revert naming `o[2]` as `box` since it is out of scope!

This has now been test-run against a video, so I believe the kinks are
worked out.

Issue: #2948

frigate/util.py

@@ -522,7 +522,7 @@ def clipped(obj, frame_shape):
     # if the object is within 5 pixels of the region border, and the region is not on the edge
     # consider the object to be clipped
     box = obj[2]
-    region = obj[4]
+    region = obj[5]
     if (
         (region[0] > 5 and box[0] - region[0] <= 5)
         or (region[1] > 5 and box[1] - region[1] <= 5)

frigate/video.py

@@ -591,6 +591,7 @@ def process_frames(
                     obj["score"],
                     obj["box"],
                     obj["area"],
+                    obj["ratio"],
                     obj["region"],
                 )
                 for obj in object_tracker.tracked_objects.values()
@@ -626,13 +627,13 @@ def process_frames(
                 for group in detected_object_groups.values():
 
                     # apply non-maxima suppression to suppress weak, overlapping bounding boxes
-                    box = o[2]  # xmin, ymin, xmax, ymax
+                    # o[2] is the box of the object: xmin, ymin, xmax, ymax
                     boxes = [
                         (
-                            box[0],
+                            o[2][0],
-                            box[1],
+                            o[2][1],
-                            box[2] - box[0],
+                            o[2][2] - o[2][0],
-                            box[3] - box[1],
+                            o[2][3] - o[2][1],
                         )
                         for o in group
                     ]

migrations/007_add_object_filter_ratio.py

@@ -30,7 +30,9 @@ SQL = pw.SQL
 def migrate(migrator, database, fake=False, **kwargs):
     migrator.add_fields(
         Event,
-        ratio=pw.FloatField(),
+        ratio=pw.FloatField(
+            default=1.0
+        ),  # There is no way to get the true ratio from an existing recording, so simply assume they are square.
     )