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Save initial frame of new objects to frame cache

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Objects that move quickly through the frame and are only seen briefly may not have the update() method called to save thumbnail_data, and may not have the initial frame saved to the tracked object frame cache. This caused a "Frame missing from frame cache" message that was patched by #7313 but this sometimes caused the wrong frame to be chosen for the thumb/snapshot.
This commit is contained in:
Josh Hawkins 2025-04-12 16:11:10 -05:00
parent 03f4318e40
commit 039148397b
2 changed files with 28 additions and 1 deletions
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21
frigate/camera/state.py
View File

@ -263,6 +263,27 @@ class CameraState:
current_detections[id],
)
# add initial frame to frame cache
self.frame_cache[frame_time] = np.copy(current_frame)
# save initial thumbnail data and best object
thumbnail_data = {
"frame_time": frame_time,
"box": new_obj.obj_data["box"],
"area": new_obj.obj_data["area"],
"region": new_obj.obj_data["region"],
"score": new_obj.obj_data["score"],
"attributes": new_obj.obj_data["attributes"],
"current_estimated_speed": 0,
"velocity_angle": 0,
"path_data": [],
"recognized_license_plate": None,
"recognized_license_plate_score": None,
}
new_obj.thumbnail_data = thumbnail_data
tracked_objects[id].thumbnail_data = thumbnail_data
self.best_objects[new_obj.obj_data["label"]] = new_obj
# call event handlers
for c in self.callbacks["start"]:
c(self.name, new_obj, frame_name)

8
frigate/track/tracked_object.py
View File

@ -144,8 +144,14 @@ class TrackedObject:
obj_data,
self.camera_config.frame_shape,
):
# use the current frame time if the object's frame time isn't in the frame cache
selected_frame_time = (
current_frame_time
if obj_data["frame_time"] not in self.frame_cache.keys()
else obj_data["frame_time"]
)
self.thumbnail_data = {
"frame_time": current_frame_time,
"frame_time": selected_frame_time,
"box": obj_data["box"],
"area": obj_data["area"],
"region": obj_data["region"],