u/Cautious-Hovercraft7

There's a few things I've figured if you're using a Reolink video doorbell on Wi-fi. flv streams work better on Wi-fi than rtsp but does not do 2 way audio but there's a workaround to add the two way audio back in using ffmpeg and back channel entry in go2rtc. I was getting ffmpeg crashes every few hours with rtsp but these went away with flv. I'm hoping this helps someone and will show up in a search

go2rtc:
  log:
  streams:
    Doorbell:
      - ffmpeg:http://10.0.0.213/flv?port=1935&app=bcs&stream=channel0_main.bcs&user=admin&password=mypassword#video=copy#audio=opus#raw=-fflags +genpts+discardcorrupt
      - rtsp://admin:mypassword@10.0.0.213:554/h264Preview_01_main # RTSP kept for talk 
    Doorbell_sub:
      - ffmpeg:http://10.0.0.213/flv?port=1935&app=bcs&stream=channel0_ext.bcs&user=admin&password=mypassword
  backchannel:
    Doorbell:
      - exec:ffmpeg -i pipe: -acodec pcm_mulaw -ar 8000 -f mulaw -f rtsp -rtsp_transport tcp rtsp://admin:mypassword@10.0.0.213:554/h264Preview_01_sub

cameras:
  Doorbell: # Video Doorbell ##########
    birdseye:
      order: 2
    snapshots:
      enabled: true
      timestamp: true
      bounding_box: true
    ffmpeg:
      inputs:
        - path: rtsp://127.0.0.1:8554/Doorbell
          input_args: preset-rtsp-restream
          roles:
            - record
        - path: rtsp://127.0.0.1:8554/Doorbell_sub
          input_args: preset-rtsp-restream
          roles:
            - detect
    detect:
      enabled: true
      width: 640
      height: 480
      fps: 7
      stationary:
        interval: 50
        threshold: 50`