WebRTC live view not working, but HLS does

[INeatFreak]

LightNVR v0.34.4 is running in docker container with this compose:

  lightnvr:
    container_name: lightnvr
    image: ghcr.io/opensensor/lightnvr:latest
    restart: unless-stopped
    networks:
      - caddy        # used as reverse proxy
    volumes:
      - /opt/lightnvr/config:/etc/lightnvr
      - /opt/lightnvr/data:/var/lib/lightnvr/data
    ports:
      - "8080:8080"          # Web UI (HTTP)
      - "8554:8554"          # RTSP Stream
      - "8555:8555"          # WebRTC (TCP)
      - "8555:8555/udp"      # WebRTC (UDP)
      - "1984:1984"          # go2rtc API
    environment:
      - LIGHTNVR_ONVIF_NETWORK=192.168.2.0/24
      - GO2RTC_CONFIG_PERSIST=true

On "Streams" tab the preview thumbnail of camera view does update every time I reload the page (image is intentionally blurred)

And on "Live View" tab, HLS view also works, there's live view streaming from camera, although a bit laggy. And ONVIF events also do trigger to record videos on movement.

But the WebRTC just keeps saying "Stream is starting..." then either it says "WebRTC connection lost. Please retry." or this error on screenshot pops up. It's not a firewall issue since I have tried with it disabled and didn't fix it. Tried deleting streams and re-adding, changing External IP on settings to both 192.168.2.1 and the local static ip of my host machine but none of it worked. Also tried other cameras and different browsers but still no chance.

Cameras are Reolink that are on 192.168.2.0 subnet. Here's my stream settings, I've added camera ip + url and added ONVIF login credentials.

Other than this I've only changed recording mode to detection based on ONVIF events, haven't messed with any other settings. Do I need to setup extra things for WebRTC to work? like go2rtc overrides? I've checked the go2rtc.yaml file and url is being generated as it should

# go2rtc configuration generated by NVR software

api:
  listen: :1984
  base_path: /go2rtc
  origin: '*'

rtsp:
  listen: ":8554"

webrtc:
  listen: ":8555"
  ice_servers:
    - urls:
      - "stun:stun.l.google.com:19302"
      - "stun:stun1.l.google.com:19302"
      - "stun:stun2.l.google.com:19302"
      - "stun:stun3.l.google.com:19302"
      - "stun:stun4.l.google.com:19302"
  candidates:
    - "*:8555"
    - "stun:stun.l.google.com:19302"

ffmpeg:
  h264: "-codec:v libx264 -g:v 30 -preset:v superfast"
  h265: "-codec:v libx265 -g:v 30 -preset:v superfast"

streams:
  # Streams will be added dynamically via API
  RL1:
    - rtsp://viewer:<redacted-password>@192.168.2.101:554/Preview_01_main#transport=tcp#timeout=30
preload:
  RL1: audio=&video=

[powerbiipsa]

Same issue in here. Not using ONVIF. HLS and MSE work fine!.

[matteius]

MSE also goes through go2rtc, and WebRTC works fine https://demo.lightnvr.com/?cols=1&rows=1&stream=demo-door

Its possible you might need to configure a TURN server depending on your network config.