Coral USB not detected during boot of PI4 (0.80/Home Assistant) - requires manual restart of Frigate

I’m running HASSOS (x64) on PI4 booting from SSD. Frigate Beta 0.8

Coral config:

detectors:
  coral:
    type: edgetpu
    device: usb

When I reboot HASSOS, the coral device is not detected:

 * Starting nginx nginx
   ...done.
Matplotlib is building the font cache; this may take a moment.
frigate.app                    INFO    : Creating directory: /tmp/cache
frigate.app                    INFO    : Camera processor started for Voordeur: 37
detector.coral                 INFO    : Starting detection process: 35
frigate.edgetpu                INFO    : Attempting to load TPU as usb
frigate.app                    INFO    : Capture process started for Voordeur: 39
ffmpeg.Voordeur.clips          ERROR   : Guessed Channel Layout for Input Stream #0.1 : mono
ffmpeg.Voordeur.detect         ERROR   : Guessed Channel Layout for Input Stream #0.1 : mono
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x5583d2ec10] moov atom not found
/media/frigate/recordings/Voordeur-20201215093539.mp4: Invalid data found when processing input
frigate.record                 INFO    : bad file: Voordeur-20201215093539.mp4
frigate.edgetpu                INFO    : No EdgeTPU detected. Falling back to CPU.

Just restarting frigate will solve the problem:

 * Starting nginx nginx
   ...done.
frigate.app                    INFO    : Creating directory: /tmp/cache
detector.coral                 INFO    : Starting detection process: 36
frigate.app                    INFO    : Camera processor started for Voordeur: 39
frigate.edgetpu                INFO    : Attempting to load TPU as usb
frigate.edgetpu                INFO    : TPU found
frigate.app                    INFO    : Capture process started for Voordeur: 41
ffmpeg.Voordeur.clips          ERROR   : Guessed Channel Layout for Input Stream #0.1 : mono
ffmpeg.Voordeur.detect         ERROR   : Guessed Channel Layout for Input Stream #0.1 : mono
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x55b10edc10] moov atom not found
/media/frigate/recordings/Voordeur-20201215094501.mp4: Invalid data found when processing input
frigate.record                 INFO    : bad file: Voordeur-20201215094501.mp4

Not sure if it is possible to do some retries when a previous run instance was using a coral device

[blakeblackshear]

Simple enough. I can add a fallback_to_cpu option that defaults to true if you dont have anything defined and defaults to false if you have the edge tpu defined.

[blakeblackshear]

RC4 will now completely exit the container if the detection process stops