Forgive my poor English，After starting frigate, the camera's microphone functions are randomly turned on and off

[busymilk]

I have two Dahua cameras that both support microphones: c_dong and c_xi. Every time I start frigate, the presence of the microphone button on each camera is random. Sometimes it exists, sometimes it doesn't. For example, the microphone button on c_dong exists, but the microphone button on c_xi doesn't. After restarting frigate, the microphone button on c_dong doesn't exist, but the microphone button on c_xi does. Sometimes, after restarting frigate, both microphone buttons exist again. However, the configuration files of the two cameras are the same, and there is no difference. I don't know how to troubleshoot the problem.

[inkeep-ai-assistant[bot]]

Your English is clear! Based on your configuration and the Frigate documentation, the appearance of the microphone button in the UI depends on whether Frigate detects a working audio stream for each camera at startup. Even if both camera configs are the same, the presence of the microphone button can be inconsistent if:

• The RTSP stream from your camera sometimes does not include audio, or the audio codec is not supported or not detected reliably.
• There is a timing or network problem causing the audio stream to be unavailable when Frigate starts.
• The stream roles and paths are not consistently providing audio-enabled streams for the audio role.

To improve reliability, ensure:

1. Your RTSP stream always includes audio (check your camera settings).
2. You assign the audio role to the correct input in your Frigate config, and that input stream definitely provides audio. For example:

   cameras:
     camera_name:
       ffmpeg:
         inputs:
           - path: rtsp://127.0.0.1:8554/your_stream
             roles:
               - audio
   

3. If you use go2rtc restreams, confirm the restream includes audio and your input uses the correct audio codec (PCMA/PCMU/AAC are recommended).

The Frigate documentation also notes that the ffmpeg process for capturing audio is a separate connection from other roles, so using go2rtc restream for audio is recommended for reliability(1).

If the problem continues, check your Frigate logs for errors about the audio stream or ffmpeg process when the microphone button is missing. This can help identify whether the issue is with the stream, network, or Frigate startup timing(1).

📚 Sources:

1. Audio Detectors

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[hawkeye217]

The AI is incorrect here - the audio role has nothing to do with the microphone button for two-way talk.

@NickM-27's response is correct. You need:

streams:
  c_dong:
    - rtsp://user1:123qweasdzxc@192.168.8.222:554/cam/realmonitor?channel=1&subtype=0#backchannel=0
    - rtsp://user1:123qweasdzxc@192.168.8.222:554/cam/realmonitor?channel=1&subtype=0
    #加下面这个是为了WebRTC支持AAC和双向语音
    - ffmpeg:c_dong#audio=opus
  ...

[NickM-27]

You need to add #backchannel=0 so that the backchannel connection is not opened by default

[busymilk]

Setting backchannel=0 does work, the microphone icons for both cameras disappear. However, I'd like the microphone icons to be visible on both cameras, meaning I can choose to start a call.
I'm not sure how to configure this. My cameras use h264 and aac audio formats. Thank you.

[hawkeye217]

What is your go2rtc config after you made the change?

[busymilk]

The two cameras have the same configuration, except for the IP and name.I have tried these configurations：

c_dong:
  - rtsp://user1:123qweasdzxc@192.168.8.222:554/cam/realmonitor?channel=1&subtype=0#backchannel=1
  - rtsp://user1:123qweasdzxc@192.168.8.222:554/cam/realmonitor?channel=1&subtype=0
   #加下面这个是为了WebRTC支持AAC和双向语音
  - ffmpeg:c_dong#audio=opus

---

c_dong:
  - rtsp://user1:123qweasdzxc@192.168.8.222:554/cam/realmonitor?channel=1&subtype=0#backchannel=1
   #加下面这个是为了WebRTC支持AAC和双向语音
  - ffmpeg:c_dong#audio=opus

---

The above two configurations are not working
I can't get the microphone icon to show up on both cameras at the same time. It appears randomly every time I restart.

[hawkeye217]

You need to have #backchannel=0, not #backchannel=1.

[busymilk]

After I added the timeout parameter, both cameras can show the microphone icon after each restart：timeout=30

c_xi:
- rtsp://user1:123qweasdzxc@192.168.8.223:554/cam/realmonitor?channel=1&subtype=0#backchannel=1#timeout=30
- ffmpeg:c_xi#audio=opus

[busymilk]

Forgive me, when I restarted again, the random microphone icon was hidden again

[hawkeye217]

See the comments above. You need to have #backchannel=0, not #backchannel=1.