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blakeblackshear
[Detector Support]: Frigate terminates after about a minute with two Corals
Describe the problem you are having
I would like to use two Corals--one for Frigate and one for Compreface. With Frigate running I can plug in the second Coral and it makes no difference. However, after restarting Frigate, it comes up, attaches a Coral, runs for about a minute and shuts down. I tried limiting its devices by mapping /dev/bus/usb/004 and the same thing happened. I don't see how it can be a power issue because the Corals are on different hubs, one of which is an add-on pcie card. So I tried setting up Frigate to use both Corals, following the configuration instructions. It comes up, shows all the cameras, shows both TPU detectors and uses both detectors, then shuts down after about a minute.
Version
0.13.1-34FB1C2
Frigate config file
mqtt:
host: mqtt.ferree-clark.org
port: 1883
topic_prefix: frigate
client_id: frigate
user: frigate
password: xxxxxxx
detectors:
coral1:
type: edgetpu
device: usb:0
coral2:
type: edgetpu
device: usb:1
database:
path: /media/frigate/frigate.db
model:
path: /edgetpu_model.tflite
labelmap_path: /labelmap.txt
width: 320
height: 320
labelmap:
2: vehicle
3: vehicle
7: vehicle
16: animal
17: animal
18: animal
19: animal
20: animal
22: animal
logger:
default: info
birdseye:
enabled: True
width: 1280
height: 720
quality: 8
mode: objects
restream: true
ffmpeg:
global_args: -hide_banner -loglevel warning
hwaccel_args: preset-vaapi
output_args:
record: preset-record-generic-audio-copy
detect:
width: 704
height: 480
fps: 6
enabled: True
stationary:
interval: 50
threshold: 50
max_frames:
objects:
person: 3600
animal: 1800
motion:
improve_contrast: False
objects:
track:
- person
- bicycle
- vehicle
- animal
filters:
person:
min_area: 1000
min_score: 0.7
animal:
min_score: 0.7
record:
enabled: True
retain:
mode: motion
days: 10
events:
pre_capture: 10
post_capture: 10
retain:
default: 30
mode: active_objects
objects:
animal: 14
expire_interval: 360
snapshots:
enabled: True
clean_copy: True
timestamp: False
bounding_box: True
crop: False
retain:
default: 30
objects:
person: 60
animal: 14
vehicle: 60
rtmp:
enabled: false
live:
height: 720
quality: 8
timestamp_style:
position: "tl"
format: "%m/%d/%Y %H:%M:%S"
color:
red: 255
green: 255
blue: 255
thickness: 2
go2rtc:
webrtc:
listen: ":8555"
streams:
camera-backyard:
- "rtsp://viewer:{FRIGATE_RTSP_PASSWORD}@camera-backyard:554/cam/realmonitor?channel=1&subtype=0"
- "ffmpeg:camera-backyard#audio=opus"
camera-backyard_sub:
- "rtsp://viewer:{FRIGATE_RTSP_PASSWORD}@camera-backyard:554/cam/realmonitor?channel=1&subtype=1"
- "ffmpeg:camera-backyard_sub#audio=opus"
camera-street:
- "rtsp://viewer:{FRIGATE_RTSP_PASSWORD}@camera-street:554/cam/realmonitor?channel=1&subtype=0"
- "ffmpeg:camera-street#audio=opus"
camera-street_sub:
- "rtsp://viewer:{FRIGATE_RTSP_PASSWORD}@camera-street:554/cam/realmonitor?channel=1&subtype=1"
- "ffmpeg:camera-street_sub#audio=opus"
camera-backdoor:
- "rtsp://viewer:{FRIGATE_RTSP_PASSWORD}@camera-backdoor:554/cam/realmonitor?channel=1&subtype=0"
- "ffmpeg:camera-backdoor#audio=opus"
camera-backdoor_sub:
- "rtsp://viewer:{FRIGATE_RTSP_PASSWORD}@camera-backdoor:554/cam/realmonitor?channel=1&subtype=1"
- "ffmpeg:camera-backdoor_sub#audio=opus"
camera-alley:
- "rtsp://viewer:{FRIGATE_RTSP_PASSWORD}@camera-alley:554/cam/realmonitor?channel=1&subtype=0"
- "ffmpeg:camera-alley#audio=opus"
camera-alley_sub:
- "rtsp://viewer:{FRIGATE_RTSP_PASSWORD}@camera-alley:554/cam/realmonitor?channel=1&subtype=1"
- "ffmpeg:camera-alley_sub#audio=opus"
camera-sidewalk:
- "rtsp://viewer:{FRIGATE_RTSP_PASSWORD}@camera-sidewalk:554/cam/realmonitor?channel=1&subtype=0"
- "ffmpeg:camera-sidewalk#audio=opus"
camera-sidewalk_sub:
- "rtsp://viewer:{FRIGATE_RTSP_PASSWORD}@camera-sidewalk:554/cam/realmonitor?channel=1&subtype=1"
- "ffmpeg:camera-sidewalk_sub#audio=opus"
camera-frontdoor:
- "rtsp://viewer:{FRIGATE_RTSP_PASSWORD}@camera-frontdoor:554/cam/realmonitor?channel=1&subtype=0"
- "ffmpeg:camera-frontdoor#audio=opus"
camera-frontdoor_sub:
- "rtsp://viewer:{FRIGATE_RTSP_PASSWORD}@camera-frontdoor:554/cam/realmonitor?channel=1&subtype=1"
- "ffmpeg:camera-frontdoor_sub#audio=opus"
camera-uppergarage:
- "rtsp://viewer:{FRIGATE_RTSP_PASSWORD}@camera-uppergarage.ferree-clark.org:554/Streaming/Channels/1"
#camera-uppergarage_sub:
#- "rtsp://viewer:{FRIGATE_RTSP_PASSWORD}@camera-uppergarage.ferree-clark.org:554/Streaming/Channels/2"
cameras:
camera-backyard:
ffmpeg:
inputs:
- path: rtsp://localhost:8554/camera-backyard
input_args: preset-rtsp-restream
roles:
- record
- path: rtsp://localhost:8554/camera-backyard_sub
input_args: preset-rtsp-restream
roles:
- detect
detect:
enabled: true
record:
enabled: true
zones:
backdriveway:
coordinates: 204,480,402,480,157,320,64,292
garden:
coordinates: 192,337,307,419,437,480,571,342,359,172,67,295
street:
coordinates: 436,36,570,98,39,284,0,225
motion:
mask:
- 704,480,443,480,704,145
- 0,480,207,480,0,168
- 704,158,704,0,388,0
- 43,76,154,46,292,110,389,161,404,206,258,202,227,256,220,365,116,286,32,247
- 537,233,544,274,551,304,505,331,481,314,431,311,333,291,354,210,336,154,411,137,469,134
objects:
track:
- person
- animal
camera-street:
ffmpeg:
inputs:
- path: rtsp://localhost:8554/camera-street_sub
input_args: preset-rtsp-restream
roles:
- detect
- path: rtsp://localhost:8554/camera-street
input_args: preset-rtsp-restream
roles:
- record
detect:
enabled: true
objects:
filters:
vehicle:
mask:
- 46,43,189,0,202,83,47,100
person:
max_area: 89999
record:
enabled: true
zones:
backdriveway:
coordinates: 395,222,704,480,0,480,0,220,180,124,281,109
westsidewalk:
coordinates: 0,162,71,70,127,90,0,217
garden:
coordinates: 704,176,485,54,296,86,412,240,704,444
motion:
mask:
- 158,96,222,91,290,84,386,48,396,0,0,0
- 422,0,676,0,704,199,636,320,539,276,424,206
mqtt:
enabled: True
timestamp: False
bounding_box: False
crop: True
height: 480
quality: 100
camera-backdoor:
ffmpeg:
inputs:
- path: rtsp://localhost:8554/camera-backdoor_sub
input_args: preset-rtsp-restream
roles:
- detect
- path: rtsp://localhost:8554/camera-backdoor
input_args: preset-rtsp-restream
roles:
- record
detect:
enabled: true
objects:
track:
- person
- animal
record:
enabled: true
zones:
eastsidewalk:
coordinates: 474,78,625,480,458,480,416,154
motion:
mask:
- 704,418,704,0,515,0
- 416,480,0,480,0,0,704,0,349,0
mqtt:
enabled: True
timestamp: False
bounding_box: False
crop: True
height: 480
quality: 100
camera-alley:
ffmpeg:
inputs:
- path: rtsp://localhost:8554/camera-alley_sub
input_args: preset-rtsp-restream
roles:
- detect
- path: rtsp://localhost:8554/camera-alley
input_args: preset-rtsp-restream
roles:
- record
detect:
enabled: true
record:
enabled: true
events:
required_zones:
- frontdriveway
- alley
zones:
frontdriveway:
coordinates: 704,480,704,408,592,150,115,171,0,226,0,480
objects:
- vehicle
- person
- animal
alley:
coordinates: 658,162,643,116,202,132,99,175
objects:
- vehicle
- person
motion:
mask:
- 219,130,704,110,704,0,186,0,0,0,0,210
objects:
filters:
person:
mask:
- 704,127,668,45,489,0,467,73
mqtt:
enabled: True
timestamp: False
bounding_box: False
crop: True
height: 480
quality: 100
camera-sidewalk:
ffmpeg:
inputs:
- path: rtsp://localhost:8554/camera-sidewalk_sub
input_args: preset-rtsp-restream
roles:
- detect
- path: rtsp://localhost:8554/camera-sidewalk
input_args: preset-rtsp-restream
roles:
- record
detect:
enabled: true
objects:
track:
- person
- animal
filters:
person:
max_area: 89999
record:
enabled: true
zones:
westsidewalk:
coordinates: 386,140,406,143,272,480,138,480
motion:
mask:
- 0,480,0,0,381,0,370,126,220,325,107,480
- 415,0,704,0,704,338,704,283,704,480,401,480
mqtt:
enabled: True
timestamp: False
bounding_box: False
crop: True
height: 480
quality: 100
camera-frontdoor:
ffmpeg:
inputs:
- path: rtsp://localhost:8554/camera-frontdoor_sub
input_args: preset-rtsp-restream
roles:
- detect
- path: rtsp://localhost:8554/camera-frontdoor
input_args: preset-rtsp-restream
roles:
- record
detect:
enabled: true
objects:
track:
- person
- animal
- vehicle
record:
enabled: true
zones:
frontporch:
coordinates: 521,241,305,480,148,480,24,366,338,187
frontsidewalk:
coordinates: 322,181,479,236,588,76,496,61
westsidewalk:
coordinates: 312,480,704,480,704,450,410,371
motion:
mask:
- 0,125,336,41,330,0,0,0
- 520,365,636,444,704,352,704,219,631,195
- 465,46,704,51,704,0,465,0
mqtt:
enabled: True
timestamp: False
bounding_box: False
crop: True
height: 480
quality: 100
camera-uppergarage:
ffmpeg:
inputs:
#- path: rtsp://localhost:8554/camera-uppergarage_sub
# input_args: preset-rtsp-restream
# roles:
# - detect
- path: rtsp://localhost:8554/camera-uppergarage
input_args: preset-rtsp-restream
roles:
- detect
- record
output_args:
record: -f segment -segment_time 10 -segment_format mp4 -reset_timestamps 1 -strftime 1 -c copy -an
detect:
enabled: true
width: 1280
height: 720
fps: 10
record:
enabled: true
objects:
track:
- person
- vehicle
filters:
person:
mask:
- 1280,441,1280,720,1084,720
motion:
mask:
- 361,64,578,67,578,43,364,46
- 1280,210,1280,0,701,0
snapshots:
enabled: True
zones:
garage_doorway:
coordinates: 0,720,349,720,350,510,0,513
mqtt:
enabled: True
timestamp: False
bounding_box: False
crop: True
height: 720
quality: 100
camera-lowergarage:
ffmpeg:
inputs:
- path: rtsp://viewer:{FRIGATE_RTSP_PASSWORD}@camera-lowergarage.ferree-clark.org:554/play2.sdp
roles:
- detect
- path: rtsp://viewer:{FRIGATE_RTSP_PASSWORD}@camera-lowergarage.ferree-clark.org:554/play1.sdp
roles:
- record
detect:
enabled: true
width: 640
height: 352
fps: 5
record:
enabled: true
objects:
track:
- person
motion:
mask:
- 640,0,640,40,0,42,0,0
snapshots:
enabled: False
camera-basement:
ffmpeg:
inputs:
- path: "rtsp://viewer:{FRIGATE_RTSP_PASSWORD}@camera-basement:554/Streaming/Channels/2"
input_args: preset-rtsp-generic
roles:
- detect
- path: "rtsp://viewer:{FRIGATE_RTSP_PASSWORD}@camera-basement:554/Streaming/Channels/1"
input_args: preset-rtsp-generic
roles:
- record
detect:
enabled: true
width: 640
height: 480
fps: 6
record:
enabled: true
objects:
track:
- person
filters:
person:
mask:
- 403,36,533,117,577,0,387,0
snapshots:
enabled: False
birdseye:
enabled: False
motion:
mask:
- 21,43,267,53,270,0,25,21
doorbell-front:
ffmpeg:
inputs:
- path: http://ghanms0001:xxxxx@doorbell-front/bha-api/video.cgi
roles:
- detect
- path: rtsp://ghanms0001:xxxxx@doorbell-front:554/mpeg/media.amp
roles:
- record
output_args:
record: -f segment -segment_time 10 -segment_format mp4 -reset_timestamps 1 -strftime 1 -c copy -an
input_args: -avoid_negative_ts make_zero -fflags nobuffer -flags low_delay -strict experimental -fflags +genpts+discardcorrupt -use_wallclock_as_timestamps 1 -timeout 5000000
detect:
enabled: true
width: 640
height: 480
fps: 5
objects:
track:
- person
- animal
record:
enabled: true
zones:
eastsidewalk:
coordinates: 351,441,343,352,281,346,246,439
frontporch:
coordinates: 348,445,358,480,0,480,57,394,235,439
motion:
mask:
- 504,480,640,480,640,0,506,0
- 0,143,84,169,184,150,236,185,345,172,385,0,0,0
mqtt:
enabled: True
timestamp: False
bounding_box: False
crop: True
height: 480
quality: 100
doorbell-back:
ffmpeg:
inputs:
- path: http://ghahic0001:xxxxx@doorbell-back/bha-api/video.cgi
roles:
- detect
- path: rtsp://ghahic0001:xxxxx@doorbell-back:554/mpeg/media.amp
roles:
- record
output_args:
record: -f segment -segment_time 10 -segment_format mp4 -reset_timestamps 1 -strftime 1 -c copy -an
input_args: -avoid_negative_ts make_zero -fflags nobuffer -flags low_delay -strict experimental -fflags +genpts+discardcorrupt -use_wallclock_as_timestamps 1 -timeout 5000000
detect:
enabled: true
width: 640
height: 480
fps: 5
objects:
track:
- person
- animal
filters:
person:
mask:
- 0,386,81,389,80,163,0,156
threshold: 0.65
record:
enabled: true
zones:
backdriveway:
coordinates: 521,480,285,315,194,322,0,348,0,480
westsidewalk1:
coordinates: 152,261,181,276,132,332,97,333
motion:
mask:
- 640,0,640,70,522,132,341,175,106,201,0,173,0,0
- 179,263,336,300,334,179,91,204
- 355,291,428,239,437,164,496,146,513,252,492,290,533,301,528,402,349,342
mqtt:
enabled: True
timestamp: False
bounding_box: False
crop: True
height: 480
quality: 100
docker-compose file or Docker CLI command
version: "3.9"
services:
frigate:
container_name: frigate
privileged: false
restart: "unless-stopped"
image: ghcr.io/blakeblackshear/frigate:stable
shm_size: "256mb"
devices:
- /dev/bus/usb/:/dev/bus/usb/
- /dev/dri:/dev/dri
volumes:
- /etc/localtime:/etc/localtime:ro
- /docker/frigate/config:/config
- /export/frigate:/media/frigate
- type: tmpfs
target: /tmp/cache
tmpfs:
size: 1000000000
environment:
FRIGATE_RTSP_PASSWORD: "xxxxx"
PLUS_API_KEY: "xxxxx"
LIBVA_DRIVER_NAME: "radeonsi"
networks:
br0-network_br0-network:
ipv4_address: 10.1.10.39
vlan4-network_vlan4-network:
ipv4_address: 10.1.4.39
stunnel:
container_name: frigate_stunnel
privileged: false
restart: "unless-stopped"
image: dweomer/stunnel
network_mode: service:frigate
environment:
STUNNEL_SERVICE: "frigate"
STUNNEL_ACCEPT: "443"
STUNNEL_CONNECT: "5000"
volumes:
- /etc/localtime:/etc/localtime:ro
- /etc/letsencrypt/live/ferree-clark.org/fullchain.pem:/etc/stunnel/stunnel.pem:ro
- /etc/letsencrypt/live/ferree-clark.org/privkey.pem:/etc/stunnel/stunnel.key:ro
networks:
br0-network_br0-network:
external: true
vlan4-network_vlan4-network:
external: true
Relevant log output
File "/usr/lib/python3/dist-packages/tflite_runtime/interpreter.py", line 160, in load_delegate
2024-02-11 13:15:03.916344122 delegate = Delegate(library, options)
2024-02-11 13:15:03.916347482 File "/usr/lib/python3/dist-packages/tflite_runtime/interpreter.py", line 119, in __init__
2024-02-11 13:15:03.916352772 raise ValueError(capture.message)
2024-02-11 13:15:03.916355092 ValueError
2024-02-11 13:15:03.916388153
2024-02-11 13:15:03.916391203 During handling of the above exception, another exception occurred:
2024-02-11 13:15:03.916393563
2024-02-11 13:15:03.916395993 Traceback (most recent call last):
2024-02-11 13:15:03.916398673 File "/usr/lib/python3.9/multiprocessing/process.py", line 315, in _bootstrap
2024-02-11 13:15:03.916449844 self.run()
2024-02-11 13:15:03.916453104 File "/usr/lib/python3.9/multiprocessing/process.py", line 108, in run
2024-02-11 13:15:03.916456234 self._target(*self._args, **self._kwargs)
2024-02-11 13:15:03.916459224 File "/opt/frigate/frigate/object_detection.py", line 102, in run_detector
2024-02-11 13:15:03.916510065 object_detector = LocalObjectDetector(detector_config=detector_config)
2024-02-11 13:15:03.916513135 File "/opt/frigate/frigate/object_detection.py", line 53, in __init__
2024-02-11 13:15:03.916516195 self.detect_api = create_detector(detector_config)
2024-02-11 13:15:03.916519105 [2024-02-11 13:14:35] frigate.app INFO : Camera processor started for camera-sidewalk: 1346
2024-02-11 13:15:03.916522855 File "/opt/frigate/frigate/detectors/__init__.py", line 18, in create_detector
2024-02-11 13:15:03.916525265 return api(detector_config)
2024-02-11 13:15:03.916528195 File "/opt/frigate/frigate/detectors/plugins/edgetpu_tfl.py", line 41, in __init__
2024-02-11 13:15:03.916567976 edge_tpu_delegate = load_delegate("libedgetpu.so.1.0", device_config)
2024-02-11 13:15:03.916571536 File "/usr/lib/python3/dist-packages/tflite_runtime/interpreter.py", line 162, in load_delegate
2024-02-11 13:15:03.916574346 raise ValueError('Failed to load delegate from {}\n{}'.format(
2024-02-11 13:15:03.916578216 ValueError: Failed to load delegate from libedgetpu.so.1.0
Operating system
Other Linux
Install method
Docker Compose
Coral version
USB
Any other information that may be helpful
No response
Thanks for looking at it! I am attaching a log file and a screen shot of the two detectors working.
coral1 does not seem to be working, 10 is the default value shown for inference speed until the actual speed is known
Yet process 1317 has a CPU percentage, and lights on both Corals were flashing during startup. Both Corals are detected according to the logs, and as far as I can tell, the configuration is correct. Is there anything I can do to further investigate?
Hello, I've got a similar stacktrace since yesterday.
frigate | 2024-02-14 15:02:04.413213073 File "/usr/lib/python3/dist-packages/tflite_runtime/interpreter.py", line 160, in load_delegate
frigate | 2024-02-14 15:02:04.413228020 delegate = Delegate(library, options)
frigate | 2024-02-14 15:02:04.413230632 File "/usr/lib/python3/dist-packages/tflite_runtime/interpreter.py", line 119, in __init__
frigate | 2024-02-14 15:02:04.413232852 raise ValueError(capture.message)
frigate | 2024-02-14 15:02:04.413235096 ValueError
frigate | 2024-02-14 15:02:04.413237076
frigate | 2024-02-14 15:02:04.413239488 During handling of the above exception, another exception occurred:
frigate | 2024-02-14 15:02:04.413241370
frigate | 2024-02-14 15:02:04.413243562 Traceback (most recent call last):
frigate | 2024-02-14 15:02:04.413246155 File "/usr/lib/python3.9/multiprocessing/process.py", line 315, in _bootstrap
frigate | 2024-02-14 15:02:04.413264912 self.run()
frigate | 2024-02-14 15:02:04.413267748 File "/usr/lib/python3.9/multiprocessing/process.py", line 108, in run
frigate | 2024-02-14 15:02:04.413269958 self._target(*self._args, **self._kwargs)
frigate | 2024-02-14 15:02:04.413272306 File "/opt/frigate/frigate/object_detection.py", line 102, in run_detector
frigate | 2024-02-14 15:02:04.413274685 object_detector = LocalObjectDetector(detector_config=detector_config)
frigate | 2024-02-14 15:02:04.413277265 File "/opt/frigate/frigate/object_detection.py", line 53, in __init__
frigate | 2024-02-14 15:02:04.413279585 self.detect_api = create_detector(detector_config)
frigate | 2024-02-14 15:02:04.413282020 File "/opt/frigate/frigate/detectors/__init__.py", line 18, in create_detector
frigate | 2024-02-14 15:02:04.413284177 return api(detector_config)
frigate | 2024-02-14 15:02:04.413286737 [2024-02-14 15:01:58] frigate.app INFO : Capture process started for Drive: 382
frigate | 2024-02-14 15:02:04.413306642 File "/opt/frigate/frigate/detectors/plugins/edgetpu_tfl.py", line 41, in __init__
frigate | 2024-02-14 15:02:04.413308793 edge_tpu_delegate = load_delegate("libedgetpu.so.1.0", device_config)
frigate | 2024-02-14 15:02:04.413311109 File "/usr/lib/python3/dist-packages/tflite_runtime/interpreter.py", line 162, in load_delegate
frigate | 2024-02-14 15:02:04.413313203 raise ValueError('Failed to load delegate from {}\n{}'.format(
frigate | 2024-02-14 15:02:04.413315382 ValueError: Failed to load delegate from libedgetpu.so.1.0
Context :
1 USB coral that has been working flawlessly for more than one year. I updated frigate docker container (I run with HA but not as an addon) to latest stable version. It worked without problems for a few days, then the web interface nginx said 502 and this stacktrace runs in loops in the container logs.
I updated the host kernel (Debian 11) recently, and had a power outage, but everything restarted smoothly. I'm looking for clues, I'll reboot and look for kernel messages about the coral to see if it's correctly detected and post them here just for the sake of finding the root cause.
If it doesn't seem to be a hardware problem, I'll post a new issue with my full config etc, and link to this issue because the crash seems the same or related.
To eliminate any concern for inadequate power, I bought a StarTech.com 2-Port 10Gbps USB-A & USB-C PCIe Card - USB 3.1. If I plug the second Coral into it and restart Frigate, Frigate fails to load the only TPU it can see via devices:/dev/bus/usb/006. Logs are quoted below. Frigate is using device 6-2. The second Coral is device 2-1. Unplugging it and restarting Frigate produces a normal startup. I don't see how this could be internal to Frigate because Frigate shouldn't have any way of knowing about the second Coral. It isn't power. Could the operating system (happens on kernels 6.6.14, 6.7.4 and 6.7.5) be causing this?
Feb 23 10:18:59 clark kernel: usb 2-1: new SuperSpeed USB device number 2 using xhci_hcd Feb 23 10:18:59 clark kernel: usb 2-1: New USB device found, idVendor=1a6e, idProduct=089a, bcdDevice= 1.00 Feb 23 10:18:59 clark kernel: usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 Feb 23 10:20:05 clark 9e70ecd2626d[3083]: 2024-02-23 10:20:05.232477576 [2024-02-23 10:19:39] frigate.detectors.plugins.edgetpu_tfl INFO : Attempting to load TPU as usb Feb 23 10:20:59 clark 87494c3dd67d[3083]: 2024-02-23 10:20:59.174416544 [2024-02-23 10:20:33] frigate.detectors.plugins.edgetpu_tfl INFO : Attempting to load TPU as usb Feb 23 10:21:39 clark 87494c3dd67d[3083]: 2024-02-23 10:21:39.284689694 [2024-02-23 10:21:13] frigate.detectors.plugins.edgetpu_tfl INFO : Attempting to load TPU as usb Feb 23 10:21:51 clark kernel: usb 2-1: USB disconnect, device number 2 Feb 23 10:22:08 clark kernel: usb 6-1: reset SuperSpeed USB device number 2 using xhci_hcd Feb 23 10:22:08 clark kernel: usb 6-1: LPM exit latency is zeroed, disabling LPM. Feb 23 10:22:09 clark cc85a491932b[3083]: 2024-02-23 10:22:09.164053239 [2024-02-23 10:22:06] frigate.detectors.plugins.edgetpu_tfl INFO : Attempting to load TPU as usb ...and the cycle repeats
After some experimentation, I have some explanations.
First, my assumption that Frigate would only know about USB devices mounted with the "devices:" option was incorrect. Docker makes the entire /sys/bus/usb tree available to every container (read-only) even if there is no USB device mapped into the container, so Frigate can enumerate (and get the ID and vendor) all of the USB devices--even those that are not mapped. It can only connect to devices that are mounted in the container.
Second, it appears to me (hopefully not another mistaken assumption) that edgetpu.py enumerates the bus, then tries to connect to the first device it finds with "ID 1a6e:089a Global Unichip Corp." which is what the Coral says when it is first plugged into the USB port. If it doesn't find one, it tries to connect to "ID 18d1:9302 Google Inc." which is what the Coral says after edgetpu.py has loaded a model. Thus, it is necessary to mount the entire /dev/bus/usb system when working with more than one Coral. If only one bus is mounted, eg /dev/bus/usb/001, and there is a second Coral plugged into a different bus, Frigate will fail because it tries first to connect to the device that hasn't been used yet and it can't.
Finally, it is possible to connect to a single Coral from within Frigate even when two are plugged in by specifying only one detector, device usb:0 (or usb:1). It is necessary to make all buses that host Corals available to the container. If all Corals are on bus 1, then /dev/bus/usb/001 works. If they are on different buses, then it has to be /dev/bus/usb or both buses. Connecting to device: usb also works, but I'm guessing it's going to be better to pick one if I want to consistently use the other one for another purpose.
Thus it should be possible to use the second Coral for another purpose such as Compreface.
For others that discover this post this is how I translated the above to use two USB corals on the same USB bus.
Find the USB bus they are on. lsusb Bus 001 Device 007: ID 18d1:9302 Google Inc. Bus 001 Device 008: ID 18d1:9302 Google Inc.
frigate config: detectors: coral1: type: edgetpu device: usb:0 coral2: type: edgetpu device: usb:1
Docker compose:
- /dev/bus/usb/001:/dev/bus/usb/001
