WebRTC not working

[janusn]

I had WebRTC of Go2rtc inside a frigate docker container working on a Synology NAS. I have migrated it to a ubuntu box recently. Everything, including MSE, works well except WebRTC. WebRTC video streams are not even shown on the frigate WebUI.

Could someone help me out?

Here is the environment:

• NUC13 with Intel iCore 1340P
• Coral TPU
• 32GB RAM
• Host OS: Ubuntu 23.04 64bit / Linux 6.2.0-25-generic
• Docker version: 24.0.4, build 3713ee1
• frigate version: 0.12.1-367D724

compose.yaml:

---
version: "3.9"
services:
  frigate:
    container_name: frigate
    privileged: true
    restart: unless-stopped
    image: ghcr.io/blakeblackshear/frigate:stable
    shm_size: "352mb" # update for your cameras based on calculation above
    devices:
      - "/dev/dri:/dev/dri"
      - /dev/bus/usb:/dev/bus/usb # passes the USB Coral, needs to be modified for other versions
    volumes:
      - ./config/config.yaml:/config/config.yaml:rw
      - /etc/localtime:/etc/localtime:ro
      - /home/frigate/cctv/frigate:/media/frigate:rw
      - /tmp:/tmp/cache:rw
    ports:
      - "5000:5000" # WebUI
      - "8554:8554" # RTSP feeds
      - "8555:8555/tcp" # WebRTC over tcp 
      - "8555:8555/udp" # WebRTC over udp

config.yaml:

mqtt:
  enabled: True
  host: 10.27.0.50
  port: 1883
  topic_prefix: frigate
  client_id: frigate
  user: [concealed]
  password: [concealed]
  stats_interval: 5
  
detectors:
   coral:
     type: edgetpu
     device: usb

birdseye:
  enabled: False
  mode: continuous

ffmpeg:
  hwaccel_args: preset-vaapi

objects:
  # Optional: list of objects to track from labelmap.txt (default: shown below)
  track:
    - person
    - dog
    - cat

go2rtc:
  rtsp:
    username: [concealed]
    password: [concealed]

  webrtc:
    listen: ":8555"
    candidates:
      - 10.27.0.50:8555
      - stun:8555

  streams:

    # stream backyard =======================================================================
    backyard:
      - rtsp:https://[concealed:concealed]@10.27.0.203:554/cam/realmonitor?channel=1&subtype=0
#      - "ffmpeg:backyard#audio=opus"
    backyard_sub:
      - rtsp:https://[concealed:concealed]@10.27.0.203:554/cam/realmonitor?channel=1&subtype=2
#      - "ffmpeg:backyard_sub#audio=opus"

    # stream frontyard ======================================================================
    frontyard:
      - rtsp:https://[concealed:concealed]@10.27.0.202:554/cam/realmonitor?channel=1&subtype=0
#      - "ffmpeg:frontyard#audio=opus"
    frontyard_sub:
      - rtsp:https://[concealed:concealed]@10.27.0.202:554/cam/realmonitor?channel=1&subtype=2
#      - "ffmpeg:frontyard_sub#audio=opus" # required by WebRTC

    # stream shed ===========================================================================
    shed:
      - rtsp:https://[concealed:concealed]@10.27.0.206:554/cam/realmonitor?channel=1&subtype=0
#      - "ffmpeg:shed#audio=opus" # required by WebRTC
    shed_sub:
      - rtsp:https://[concealed:concealed]@10.27.0.206:554/cam/realmonitor?channel=1&subtype=2
#      - "ffmpeg:shed_sub#audio=opus" # required by WebRTC
      
cameras:
[trimmed]

Frigate log:

2023-07-18 19:45:15.534138927  [INFO] Starting Frigate...
2023-07-18 19:45:16.118688749  [2023-07-18 19:45:16] frigate.app                    INFO    : Starting Frigate (0.12.1-367d724)
2023-07-18 19:45:16.144298747  [2023-07-18 19:45:16] peewee_migrate                 INFO    : Starting migrations
2023-07-18 19:45:16.299191478  [2023-07-18 19:45:16] peewee_migrate                 INFO    : There is nothing to migrate
2023-07-18 19:45:16.308069921  [2023-07-18 19:45:16] detector.coral                 INFO    : Starting detection process: 721
2023-07-18 19:45:19.504272844  [2023-07-18 19:45:16] frigate.app                    INFO    : Output process started: 723
2023-07-18 19:45:19.504333025  [2023-07-18 19:45:16] frigate.detectors.plugins.edgetpu_tfl INFO    : Attempting to load TPU as usb
2023-07-18 19:45:19.504360057  [2023-07-18 19:45:16] frigate.app                    INFO    : Camera processor started for backyard: 729
2023-07-18 19:45:19.504381450  [2023-07-18 19:45:16] frigate.app                    INFO    : Camera processor started for frontyard: 731
2023-07-18 19:45:19.504401187  [2023-07-18 19:45:16] frigate.app                    INFO    : Camera processor started for shed: 732
2023-07-18 19:45:19.504421279  [2023-07-18 19:45:16] frigate.app                    INFO    : Capture process started for backyard: 734
2023-07-18 19:45:19.504439830  [2023-07-18 19:45:16] frigate.app                    INFO    : Capture process started for frontyard: 737
2023-07-18 19:45:19.504458198  [2023-07-18 19:45:16] frigate.app                    INFO    : Capture process started for shed: 740
2023-07-18 19:45:19.508119157  [2023-07-18 19:45:19] frigate.detectors.plugins.edgetpu_tfl INFO    : TPU found
2023-07-18 19:45:21.503248600  [2023-07-18 19:45:21] frigate.record                 ERROR   : Error occurred when attempting to maintain recording cache
2023-07-18 19:45:21.503252018  [2023-07-18 19:45:21] frigate.record                 ERROR   : list index out of range

Go2rtc log:

2023-07-18 19:45:15.533363075  [INFO] Preparing go2rtc config...
2023-07-18 19:45:15.650829217  [INFO] Not injecting WebRTC candidates into go2rtc config as it has been set manually
2023-07-18 19:45:15.668631686  [INFO] Starting go2rtc...
2023-07-18 19:45:15.801409868  19:45:15.801 INF go2rtc version 1.2.0 linux/amd64
2023-07-18 19:45:15.801452614  19:45:15.801 INF [api] listen addr=:1984
2023-07-18 19:45:15.801619185  19:45:15.801 INF [rtsp] listen addr=:8554
2023-07-18 19:45:15.801741048  19:45:15.801 INF [srtp] listen addr=:8443
2023-07-18 19:45:15.801826951  19:45:15.801 INF [webrtc] listen addr=:8555
2023-07-18 19:45:25.534785004  [INFO] Starting go2rtc healthcheck service...

Nothing unusual was noticed in Nginx log.

[NickM-27]

Is 10.27.50.0 still the correct up address?

[janusn]

Yes, the new IP is 10.27.0.50.

[NickM-27]

You'll need to check logs to see why it is not working then. Go2rtc dashboard is helpful for this as well.

[janusn]

@NickM-27

Thanks for your suggestion. I. have update the first post with separate logs from Go2RTC and Frigate. Nothing suspicious.

I have tried the WebRTC links listed from Go2RTC on Chrome for macOS Version 114.0.5735.198. They do not work. However, they work on Chrome for iPadOS and iOS Version 114.0.5735.124.

It is very intriguing.

[janusn]

By the way, I have got an error.

frigate.record                 ERROR   : Error occurred when attempting to maintain recording cache
frigate.record                 ERROR   : list index out of range

Is it normal? Is it related?

[NickM-27]

Not related, and if it only happens once on startup not a big deal though I've not seen it in a standard install before

[janusn]

Thanks for your reply.

Yeah, it comes once every start. Good to hear that it is harmless.