when i mute mic it still sending my audio packets is it default behaviour ??

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this is my method check is there is any issue

Future<void> toggleAudioMute() async {
  if (_isChangingAudioDevice) return;
  _isChangingAudioDevice = true;
  _notify();

  try {
    final lp = _room?.localParticipant;
    if (lp == null) return;

    final bool isMicEnabled = lp.isMicrophoneEnabled();
    if (isMicEnabled) {
      await lp.setMicrophoneEnabled(false);
      _enableAudioJustForPreJoinStatus = false;
    } else {
      await lp.setMicrophoneEnabled(true);
      _enableAudioJustForPreJoinStatus = true;
    }
  } catch (e, st) {
    await Logger.logException(e, st);
    fw.debugPrint('toggleAudioMute error: $e');
  } finally {
    _isChangingAudioDevice = false;
    _notify();
  }
}

Thanks — I reviewed your

toggleAudioMute

method. The code looks correct for toggling the local microphone with the LiveKit SDK: calling

lp.setMicrophoneEnabled(false)

should stop sending actual audio data, and

true

should resume it. A few diagnostic suggestions to narrow down why you still see packets: • Confirm which SDK and version you’re using (Web/iOS/Android/Flutter). • Verify there are no other active local audio tracks besides the microphone. • Check whether the packets you see are actual audio vs. silence/keep‑alive: use

getStats()

on the PeerConnection to inspect RTP/packet sizes and audio levels. • Remember Opus DTX can send very small packets during silence (low bitrate) — that’s not the same as sending actual audio while muted. Can you tell me your SDK/platform and whether

getStats()

shows nonzero audio level/bytes while muted? I can then suggest specific commands or next steps. , with interactive elements

if i off dtx then what happen

Good question — regarding turning DTX off and how it affects muting. • Turning off Opus DTX means silence is encoded and sent as normal audio frames, so bandwidth during quiet periods will be higher (you’ll see more/regular audio packets when the mic is active but silent). • Muting the microphone with

setMicrophoneEnabled(false)

still stops sending audio data entirely. Disabling DTX does not cause audio to be sent while the track is muted. • If you still see packets while muted, it likely means the track isn’t actually muted at the peer connection level or you have another active audio track. If you want, tell me which SDK/platform and version you’re using (Flutter/web/iOS/Android) and I’ll show how to disable DTX for that SDK and how to inspect

getStats()

to confirm whether packets are truly audio vs. DTX/keep‑alive. Sources: Bringing Zoom's end-to-end optimizations to WebRTC | LiveKit, with interactive elements

i get some ghost participant from sdk it show participant is active with track 0 but it does not actually present

Thanks — I’m responding about the ghost participant showing as active with track 0. This usually means the client/UI didn’t get or process the participant leave / track unpublished signaling, or the participant wasn’t cleaned up. To help diagnose and fix: • Which SDK/platform and version are you using (Flutter/web/iOS/Android)? • Can you confirm the participant SID/identity shown as the ghost? Try these steps now: 1. Verify your client listens for and handles these events:

participantDisconnected

(or

participant_left

) and

trackUnpublished

— remove the participant and UI entry when those fire. 2. Check server logs/webhooks for mismatched join/leave events for that participant SID. 3. Ensure you explicitly unpublish/stop and dispose local tracks when leaving: unpublish track -> stop track -> close/ dispose participant object in your client. 4. Enable verbose SDK logging and capture the signaling messages around when that participant joined/left; look for missing disconnect events or errors. 5. If you see a participant with a track SID but zero published tracks, remove them from the UI and confirm the server reports them as disconnected. If you share SDK/platform+version and a sample participant SID or trimmed logs (events around join/leave), I’ll tell you the exact events/API calls to inspect or a client-side snippet to force-clean the ghost. Sources: Bringing Zoom's end-to-end optimizations to WebRTC | LiveKit, with interactive elements

i am using livekit 1.9.3 and client sdk 2.7.0 lets say we are 5 participants at a time. out of 5 one participant has left. live kit server initiated leave socket propoerly remaining 4 participants received leave event. now if i ask participant list from room, there is a scenario that out of remaining 4 one or 2 partcipant may get participant which has already left. why ?

Thanks — I’m responding about why the room’s participant list sometimes still includes a user who already left, given you’re on LiveKit server 1.9.3 and client SDK 2.7.0. Possible causes • The SDK’s participant list is a local cache updated by signaling events. Network latency or event ordering can cause a short window where your code reads the cache before the leave/disconnect event is applied. • Race conditions: if you query the list concurrently with handling the leave event (or right after reconciling tracks), the stale entry can appear. • Incomplete cleanup: if the client doesn’t fully handle

participantDisconnected

/

trackUnpublished

(or an error occurs while processing those events), the local cache/UI may not remove the participant. • Intermittent signaling delivery issues can cause some clients to process events slightly later than others. Immediate troubleshooting steps 1. Confirm you handle these events and remove participants from your UI/cache when they fire: ◦

participantDisconnected

(or SDK equivalent) ◦

trackUnpublished

/

trackUpdated

1. After receiving a leave event, add a short guard delay (50–200 ms) before re-reading the participant list to avoid a race when the SDK applies updates. 2. Enable verbose SDK logging on the clients that show the stale participant and capture the sequence around the leave (join/leave events, track updates). Inspect timestamps/order. 3. Check for concurrent calls that read or modify the participant list; serialize those operations if needed. 4. Verify there are no additional active tracks published with the same identity (e.g., reconnection attempts or duplicate publishes). 5. If you can reproduce reliably, capture client logs showing the leave event arrival and the subsequent participant-list query. If you’d like, share a trimmed log showing: the leave event timestamp, the SDK event handling logs on a client that still lists the participant, and the exact moment you query the participant list. With that I can point to the exact race or handler gap and suggest a minimal code fix. , with interactive elements

is there any way to sync client sdk to livekit server forcefully

You’re asking if you can force the client SDK to fully resync its participant list with the LiveKit server. Short answer: there’s no single “force‑sync” API in the client SDK, but you have reliable options to achieve a fresh, authoritative view. What’s true • The client SDK maintains state from real‑time signaling; there is no built‑in method to explicitly refresh the SDK’s RemoteParticipant list on demand. • Eventual consistency and race conditions can cause short windows where a stale (ghost) participant appears. Options to get a fresh authoritative state • Reconnect the client: call disconnect() then connect() to the room. This reloads the full server state for that client and clears local cache. • Server-side authoritative check: use the server API (RoomServiceClient.listParticipants()) to fetch the canonical participant list, then reconcile differences in your client UI. • Periodic reconcile: periodically call the server API and compare with the client list; remove any participants that the server no longer reports. • Defensive client handling: ◦ Ensure you handle

participantDisconnected

/

trackUnpublished

events and remove UI entries immediately. ◦ Add a short guard delay (50–200 ms) before reading participant list after leave events to avoid race conditions. ◦ Serialize access to your local participant cache to avoid concurrent read/write races. If you want, I can: • Provide a small code snippet for reconnect logic (your platform), or • Show how to call and reconcile with

listParticipants()

(server API) and apply the diff in the client. Which would you prefer, and what platform/SDK are you using for the client? Sources: How we built a globally distributed mesh network to scale WebRTC | LiveKit, with interactive elements

detials of this RoomServiceClient.listParticipants()

You asked for details about RoomServiceClient.listParticipants(). Below is a concise summary of what it does, typical parameters/response, auth notes, and example usage. Tell me which server SDK (Node/Go/Python/.NET) you use and I’ll give a ready-to-run snippet. What it does • Returns the authoritative list of participants currently in a LiveKit room (server-side view). • Useful to reconcile client caches and detect “ghost” participants. Authentication • Must be called from a trusted server environment using your LiveKit API key/secret or server SDK credentials. Client-side SDKs should not call this directly. Typical parameters • roomName (required): the room identifier to list participants for. • Optional pagination/filters: some SDKs support page size / page token if many participants (check your SDK). Response (ParticipantInfo fields you’ll get) • sid: participant SID • identity: participant identity string • state: connection state (e.g., JOINED, DISCONNECTED) • metadata: any participant metadata • publishedTracks / trackSids: published track info and states • joinedAt / lastSeen: timestamps or connection info (SDK-dependent) Behavior notes • This is the server’s source of truth; use it to detect participants the server considers disconnected. • Combine with client-side events to reconcile UI state. • Forcing a client reconnect (disconnect/connect) will also refresh the client’s local state. Example (Node/TypeScript)

// assumes RoomServiceClient or RoomService initialized with server credentials
const participants = await roomService.listParticipants(roomName);
participants.forEach(p => {
  console.log(p.sid, p.identity, p.state, p.publishedTracks?.length);
});

Next step • Tell me which server SDK/language you’re using and I’ll provide a copy-paste example showing auth, calling

listParticipants()

, pagination (if applicable), and a simple diff routine to reconcile client lists., with interactive elements

i am using flutter

Thanks — I’ll explain how to use

RoomServiceClient.listParticipants()

with Flutter in mind. Quick summary •

listParticipants()

is a server‑side API (part of LiveKit server SDKs). You must call it from a trusted backend using your LiveKit API key/secret. The Flutter client cannot and should not call it directly. • It returns authoritative

ParticipantInfo

objects:

sid

,

identity

,

state

(JOINED/DISCONNECTED),

metadata

, published tracks/trackSids, timestamps, etc. • Use it to reconcile ghost/stale participants shown in the Flutter client. Recommended approaches • Backend reconciliation: a. Implement an endpoint on your server that calls

RoomServiceClient.listParticipants(roomName)

. b. Return the participant list (or a diff) to the Flutter client. c. Flutter compares server list vs local SDK list and removes any participants that server reports as DISCONNECTED or absent. • Client reconnect: ◦ As a simpler alternative, have the Flutter client do a

disconnect()

then

connect()

to refresh its local state from the server. Practical notes • Authentication: call from server with LiveKit API credentials; never embed secrets in the Flutter app. • Pagination: some server SDKs support pagination for large rooms—handle page tokens if needed. • Use

state

and

publishedTracks

from

ParticipantInfo

to decide if a participant is truly present. If you want, I can: • Provide a ready‑to‑use server example in Node/Go/Python/.NET showing auth +

listParticipants(roomName)

and a simple diff routine. • Provide a short Flutter snippet showing how to call your backend endpoint and reconcile the local participant list. Which backend language do you plan to use? , with interactive elements

what shud v do if we confirm that one participant has left but local sdk still has the references.

Thanks — I’m responding about what to do when you’ve confirmed a participant left but the Flutter client still has a stale reference. Recommended corrective actions (pick one or combine): 1. Immediate client cleanup ◦ Ensure you handle the

participantDisconnected

(or equivalent) event and: ▪︎ Remove the participant from your local participant list/UI. ▪︎ Call

participant.dispose()

(or SDK equivalent) to stop tracks and free resources. ◦ Add a short guard delay (50–200 ms) before reading the participant list after leave events to avoid race conditions. 1. Defensive checks where you query the list ◦ When reading the SDK participant list, verify each participant’s `state`/`connectionState` or

publishedTracks

before showing them. If

state

is DISCONNECTED or

publishedTracks

is empty, remove them from the UI. 1. Force a fresh client state ◦ If stale references persist, call

room.disconnect()

then

room.connect()

to re-sync full server state for that client. 1. Server-side reconciliation (authoritative) ◦ Implement a backend endpoint that calls

RoomServiceClient.listParticipants(roomName)

and returns the canonical list. ◦ From Flutter, fetch that list and reconcile (remove any participants not present or marked DISCONNECTED on the server). 1. Preventive measures ◦ Serialize updates to your local participant cache to avoid concurrent read/write races. ◦ Enable verbose SDK logging when reproducing the issue to capture the leave event and subsequent state transitions. If you want, I can: • Provide a small Flutter code snippet showing how to handle the disconnect event and call

participant.dispose()

, or • Provide a simple server snippet (your preferred language) that calls

listParticipants()

and a client-side reconcile example. Which snippet would help most? , with interactive elements

i can not not reconnect to the room. becuase i will have to stop meeting once, and i am not using server api too at client side, in short if i got confirmation that one participant has left and there is not active track . can i ignore it ?

Short answer: yes—you can safely remove/ignore that stale participant locally without reconnecting or calling server APIs, but you should clean up references to avoid UI glitches or resource leaks. What to do now • Remove the participant from your local list/UI when you confirm they left (or when you detect no active tracks). • Call

participant.dispose()

(or the SDK equivalent) to stop tracks and free resources. • Ensure your UI checks `state`/`publishedTracks` before rendering a participant (hide if DISCONNECTED or zero tracks). • Optionally keep a short grace window (50–200 ms) before final removal to avoid races. Minimal Flutter sketch

// on participant disconnect / when you confirm left:
setState(() {
  participants.removeWhere((p) => p.sid == leftSid);
});
participant.dispose(); // stop tracks, free resources

Why this is safe • The server is authoritative; if it confirmed the leave and there are no active tracks, removing the client-side reference only cleans local state and does not affect the meeting. • This avoids forcing a disconnect/reconnect and works without server APIs. If you want, I can provide a precise Flutter snippet showing event handlers for

participantDisconnected

and a defensive renderer that skips disconnected participants. Which would you prefer? , with interactive elements

this ghost participants occur when i use self hosted server if i use livekit cloud server it show actual participants only

Thanks — I’m responding about why ghost participants appear only on your self‑hosted LiveKit server and what to check. Likely causes on self‑hosted deployments • State propagation issues in a clustered or load‑balanced setup (events not reaching all nodes). • WebSocket/load‑balancer misconfiguration (no sticky sessions or improper WebSocket passthrough). • Redis/NATS problems or replication lag causing participant state not to be broadcast to every node. • Mismatched LiveKit component versions or configuration differences between nodes. • Single‑node misconfiguration (room event broadcasting disabled, or flags like

disable_sync

toggled). Immediate checklist to troubleshoot • Verify deployment topology: single node or cluster, and whether a LB sits in front of nodes. • Ensure WebSocket passthrough and sticky sessions are enabled on your load balancer (so signaling reaches the same node). • Check Redis and NATS health and latency; ensure they’re reachable by all LiveKit nodes. • Confirm all LiveKit components run the same version and config (especially room/state related flags). • Enable verbose server logs and search for missing or delayed

participant_left

/

participant_disconnected

events. • Reproduce with logging: capture the sequence when a participant leaves and confirm that the server emitted the leave event and broadcasted it to other nodes. • If single‑node, confirm

room_event_broadcast

/ sync settings are correct and no flags prevent state propagation. Short mitigation you can apply client‑side • Continue removing/disposing stale participants locally when you confirm the server reports them gone (safe fix). • Optionally implement a server endpoint that calls

RoomServiceClient.listParticipants()

to reconcile clients instead of forcing reconnects. If you want, share these deployment details and I’ll give targeted steps: • single node or cluster? • load balancer type/config (sticky sessions, WebSocket passthrough)? • Redis/NATS setup (single/clustered, versions)? • LiveKit server version and config flags., with interactive elements

1.9.3 version i use for backend sdk

Thanks — I’m responding to your self‑hosted ghost participant issue on LiveKit 1.9.3. Short answer: ghost participants on self‑hosted are usually caused by state propagation or signaling delivery problems between nodes/components (Redis/NATS/LOAD BALANCER). LiveKit Cloud avoids this because it’s managed and correctly configured. Checklist to troubleshoot and fix (apply in order) 1. Confirm topology & versions ◦ Are you single‑node or a cluster? Ensure every LiveKit instance runs the exact same 1.9.3 binary and config. 1. Load balancer / WebSocket config ◦ If you use an LB, enable WebSocket passthrough and sticky sessions so signaling stays on the same node for a participant. 1. Message bus/replication health ◦ Verify NATS and Redis are healthy, reachable, low latency, and not dropping or delaying messages. 1. Server config flags ◦ Check settings related to event broadcasting / sync (ensure room event broadcast isn’t disabled). 1. Logs & reproduction ◦ Turn on debug logs (log_level=debug) on all nodes. Reproduce a leave and verify the sequence: participant disconnect -> server emits participant_left -> other nodes receive/broadcast the event. Look for missing or delayed participant_left events. 1. Race or client handling (defensive) ◦ Ensure clients handle `participantDisconnected`/`trackUnpublished` and dispose participant objects. As a safe client fix, remove local references when server confirms leave (or when publishedTracks are empty). 1. Short mitigations ◦ Use server-side

RoomServiceClient.listParticipants()

to reconcile clients, or implement a small backend endpoint returning authoritative state for your Flutter app. 1. Consider upgrade ◦ If feasible, test on the latest LiveKit release (post‑1.9.3) — there have been fixes related to state propagation. If you want targeted steps, tell me: • Single node or cluster? • Do you have an LB in front (type/config: nginx/traefik/ALB)? • NATS/Redis: single or clustered, and any recent errors in logs? • A representative debug log snippet around a participant leaving (server-side) — I can point to the exact missed event. If you prefer, I can provide exact commands/config checks for nginx/ALB sticky sessions, Redis/NATS health checks, or a server log filtering command to find participant leave events. Which would help most? , with interactive elements

give me complete configuration of server to solve this issue

I don't have the answer you're looking for. You could also try asking your question: • in one of the other Slack channels or • to https://deepwiki.com/livekit/livekit_composite which is trained on all LiveKit source code If you find the answer, please post it here to help others!

is new version fix any issue realted to state propagation.