Preserve output from 'best.jpg' API after Frigate restart (to get rid of black boxes for all tracked objects)

It does not look like output of best.jpg API endpoint (like /api/camera_1/car/best.jpg?crop=1&h=150) is preserved after Frigate restart. Despite there being pleny of events / snapshots in storage, after restart each ‘best’ image reverts to a black square.

This results with ‘Tracked Objects’ defaulting to black as well:

(it might take hours or more for all these to repopulate - depending on the activity in the video)

It seems like this is because best_objects in CameraState is just in-memory dictionary:

https://github.com/blakeblackshear/frigate/blob/master/frigate/object_processing.py#L328

Some sort of persistence for this (in db?) could be very useful - the UI looks borken with all these black boxes, which is quite alarming and potentially confusing the users, which might think something is not working as it should (I know I got confused!)

[dermotduffy]

FWIW: I would like to be able to give the Frigate card the option of showing the latest ‘best’ match (across any object type, or a specified object type) in the card image view. It is possible the described replacement could fit that bill.

[KillahB33]

Ah ok, so once that replacement goes in than I can probably turn snapshots back off.

Appreciate the help and knowledge! Thank you