webrtc-stats-exporter
v1.0.3
Published
WebRTC pc.getStats() collector with HTTP/gRPC export, batching and retry
Maintainers
arjunshajitechReadme
webrtc-stats-exporter
WebRTC Stats Exporter is a lightweight utility designed to collect, parse, and simplify WebRTC RTCPeerConnection statistics and publish them to a local collector or an external API.
Installation
npm i webrtc-stats-exporterQuick Start
import { WebRTCExporter } from 'webrtc-stats-exporter';
const exporter = new WebRTCExporter({
sessionId: 'call-abc-123',
sessionName: 'Support Call',
url: 'https://api.yourapp.com/webrtc/ingest',
getStatsInterval: 2000,
batchSize: 20,
flushInterval: 5000,
timeout: 10000,
maxRetries: 3,
debug: true,
});
exporter.addPeer({
peerId: 'peer-alice',
peerName: 'Alice',
pc: peerConnection, // RTCPeerConnection instance
});
// Local events
exporter.on('stats', (event) => {
console.log('audio inbound:', event.data.audio.inbound);
console.log('video outbound:', event.data.video.outbound);
console.log('candidate pairs:', event.data.candidatePair);
});
exporter.on('export:success', ({ count }) => console.log(`✓ Sent ${count} events`));
exporter.on('export:error', ({ error }) => console.error('✗ Export failed:', error));
// When call ends
exporter.removePeer('peer-alice');
await exporter.destroy();Options
| Option | Type | Default | Description |
|---|---|---|---|
| sessionId | string | auto-generated | Unique ID for this session/call |
| sessionName | string | 'unknown' | Human-readable session name |
| url | string | required | Backend endpoint URL |
| headers | object | {} | Extra HTTP headers (e.g. Authorization) |
| getStatsInterval | number | 2000 | Poll interval in ms |
| rawStats | boolean | false | Include raw RTCStatsReport in events |
| statsObject | boolean | false | Include flat id-keyed object in events |
| batchSize | number | 20 | Flush when queue reaches this size |
| flushInterval | number | 5000 | Flush every N ms regardless of queue size |
| timeout | number | 10000 | Request timeout in ms |
| maxRetries | number | 3 | Max retry attempts per batch |
| retryBaseDelay | number | 500 | Initial retry delay in ms |
| retryMaxDelay | number | 10000 | Max retry delay cap in ms |
| debug | boolean | false | Enable console debug logs |
Methods
addPeer({ peerId, peerName, pc })
Start monitoring a RTCPeerConnection.
removePeer(peerId)
Stop monitoring a peer and clean up its listeners.
getPeerIds()
Returns array of currently monitored peer IDs.
getTimeline()
Returns the full event timeline array.
flush()
Immediately flush the batch queue. Returns a Promise.
window.addEventListener('beforeunload', () => exporter.flush());destroy()
Flush, stop all monitors, remove all listeners. Returns a Promise.
Events
| Event | When | Payload |
|---|---|---|
| stats | Every poll interval | { peerId, peerName, timestamp, data } |
| timeline | Every event | same as above |
| iceConnectionStateChange | ICE state changes | { peerId, data: { state } } |
| connectionStateChange | Connection state changes | { peerId, data: { state } } |
| iceGatheringStateChange | Gathering state changes | { peerId, data: { state } } |
| signalingStateChange | Signaling state changes | { peerId, data: { state } } |
| export:success | Batch sent successfully | { count, sessionId } |
| export:error | Batch failed after retries | { error, count, items } |
stats event data shape
exporter.on('stats', ({ data }) => {
data.audio.inbound // RTCInboundRtpStreamStats[] filtered for audio
data.audio.outbound // RTCOutboundRtpStreamStats[] filtered for audio
data.video.inbound // RTCInboundRtpStreamStats[] filtered for video
data.video.outbound // RTCOutboundRtpStreamStats[] filtered for video
data.remote.inbound // RTCRemoteInboundRtpStreamStats[]
data.candidatePair // RTCIceCandidatePairStats[]
data.localCandidate // RTCIceCandidateStats[]
data.remoteCandidate // RTCIceCandidateStats[]
data.transport // RTCTransportStats[]
data.codec // RTCCodecStats[]
data.dataChannel // RTCDataChannelStats[]
data.raw // all stats grouped by type
});What your backend receives
Every batch is a POST with this JSON body:
{
"sessionId": "test-1772304502224",
"sessionName": "Simple Test",
"exportedAt": "2026-02-28T18:48:27.235Z",
"count": 8,
"items": [
{
"event": "signalingStateChange",
"tag": "connection",
"peerId": "alice",
"peerName": "Alice",
"timestamp": "2026-02-28T18:48:23.211Z",
"data": {
"state": "have-local-offer"
}
},
{
"event": "iceGatheringStateChange",
"tag": "connection",
"peerId": "alice",
"peerName": "Alice",
"timestamp": "2026-02-28T18:48:23.212Z",
"data": {
"state": "gathering"
}
},
{
"event": "iceConnectionStateChange",
"tag": "connection",
"peerId": "alice",
"peerName": "Alice",
"timestamp": "2026-02-28T18:48:23.239Z",
"data": {
"state": "checking"
}
},
{
"event": "signalingStateChange",
"tag": "connection",
"peerId": "alice",
"peerName": "Alice",
"timestamp": "2026-02-28T18:48:23.241Z",
"data": {
"state": "stable"
}
},
{
"event": "iceConnectionStateChange",
"tag": "connection",
"peerId": "alice",
"peerName": "Alice",
"timestamp": "2026-02-28T18:48:23.242Z",
"data": {
"state": "connected"
}
},
{
"event": "connectionStateChange",
"tag": "connection",
"peerId": "alice",
"peerName": "Alice",
"timestamp": "2026-02-28T18:48:23.242Z",
"data": {
"state": "connecting"
}
},
{
"event": "iceGatheringStateChange",
"tag": "connection",
"peerId": "alice",
"peerName": "Alice",
"timestamp": "2026-02-28T18:48:23.242Z",
"data": {
"state": "complete"
}
},
{
"event": "connectionStateChange",
"tag": "connection",
"peerId": "alice",
"peerName": "Alice",
"timestamp": "2026-02-28T18:48:23.244Z",
"data": {
"state": "connected"
}
}
]
}{
"sessionId": "test-1772304502224",
"sessionName": "Simple Test",
"exportedAt": "2026-02-28T18:48:32.263Z",
"count": 1,
"items": [
{
"event": "stats",
"tag": "stats",
"peerId": "alice",
"peerName": "Alice",
"timestamp": "2026-02-28T18:48:28.208Z",
"data": {
"audio": {
"inbound": [],
"outbound": [
{
"id": "OT01A450088848",
"timestamp": 1772304508207.719,
"type": "outbound-rtp",
"codecId": "COT01_111_minptime=10;useinbandfec=1",
"kind": "audio",
"mediaType": "audio",
"ssrc": 450088848,
"transportId": "T01",
"bytesSent": 16112,
"packetsSent": 248,
"active": true,
"headerBytesSent": 6944,
"mediaSourceId": "SA1",
"mid": "0",
"nackCount": 0,
"packetsSentWithEct1": 0,
"remoteId": "RIA450088848",
"retransmittedBytesSent": 0,
"retransmittedPacketsSent": 0,
"targetBitrate": 32000,
"totalPacketSendDelay": 0
}
]
},
"video": {
"inbound": [],
"outbound": [
{
"id": "OT01V310911517",
"timestamp": 1772304508207.719,
"type": "outbound-rtp",
"codecId": "COT01_96",
"kind": "video",
"mediaType": "video",
"ssrc": 310911517,
"transportId": "T01",
"bytesSent": 148188,
"packetsSent": 157,
"active": true,
"encoderImplementation": "libvpx",
"encodingIndex": 0,
"firCount": 0,
"frameHeight": 240,
"frameWidth": 320,
"framesEncoded": 46,
"framesPerSecond": 10,
"framesSent": 46,
"headerBytesSent": 5272,
"hugeFramesSent": 1,
"keyFramesEncoded": 1,
"mediaSourceId": "SV2",
"mid": "1",
"nackCount": 0,
"packetsSentWithEct1": 0,
"pliCount": 0,
"powerEfficientEncoder": false,
"qpSum": 294,
"qualityLimitationDurations": {
"bandwidth": 4.922,
"cpu": 0,
"none": 0.047,
"other": 0
},
"qualityLimitationReason": "bandwidth",
"qualityLimitationResolutionChanges": 0,
"remoteId": "RIV310911517",
"retransmittedBytesSent": 0,
"retransmittedPacketsSent": 0,
"rtxSsrc": 2857666661,
"scalabilityMode": "L1T1",
"targetBitrate": 600000,
"totalEncodeTime": 0.088,
"totalEncodedBytesTarget": 0,
"totalPacketSendDelay": 0.019643
}
]
},
"remote": {
"inbound": [
{
"id": "RIA450088848",
"timestamp": 1772304505731.189,
"type": "remote-inbound-rtp",
"codecId": "COT01_111_minptime=10;useinbandfec=1",
"kind": "audio",
"mediaType": "audio",
"ssrc": 450088848,
"transportId": "T01",
"jitter": 0.000187,
"packetsLost": 0,
"fractionLost": 0,
"localId": "OT01A450088848",
"roundTripTime": 0.001,
"roundTripTimeMeasurements": 1,
"totalRoundTripTime": 0.001
},
{
"id": "RIV310911517",
"timestamp": 1772304507652.477,
"type": "remote-inbound-rtp",
"codecId": "COT01_96",
"kind": "video",
"mediaType": "video",
"ssrc": 310911517,
"transportId": "T01",
"jitter": 0.000633,
"packetsLost": 0,
"fractionLost": 0,
"localId": "OT01V310911517",
"roundTripTime": 0.001,
"roundTripTimeMeasurements": 4,
"totalRoundTripTime": 0.004
}
],
"outbound": []
},
"candidatePair": [
{
"id": "CP70BEs/fi_0ExDz0x8",
"timestamp": 1772304508207.719,
"type": "candidate-pair",
"availableOutgoingBitrate": 1255600,
"bytesDiscardedOnSend": 0,
"bytesReceived": 4537,
"bytesSent": 181656,
"consentRequestsSent": 4,
"currentRoundTripTime": 0,
"lastPacketReceivedTimestamp": 1772304508196,
"lastPacketSentTimestamp": 1772304508204,
"localCandidateId": "I70BEs/fi",
"nominated": true,
"packetsDiscardedOnSend": 0,
"packetsReceived": 89,
"packetsSent": 413,
"priority": 9114756780654345000,
"remoteCandidateId": "I0ExDz0x8",
"requestsReceived": 5,
"requestsSent": 5,
"responsesReceived": 5,
"responsesSent": 5,
"state": "succeeded",
"totalRoundTripTime": 0.004,
"transportId": "T01",
"writable": true
},
{
"id": "CP70BEs/fi_8tjtCZH0",
"timestamp": 1772304508207.719,
"type": "candidate-pair",
"bytesDiscardedOnSend": 0,
"bytesReceived": 0,
"bytesSent": 0,
"consentRequestsSent": 0,
"localCandidateId": "I70BEs/fi",
"nominated": false,
"packetsDiscardedOnSend": 0,
"packetsReceived": 0,
"packetsSent": 0,
"priority": 9114475305677635000,
"remoteCandidateId": "I8tjtCZH0",
"requestsReceived": 0,
"requestsSent": 0,
"responsesReceived": 0,
"responsesSent": 0,
"state": "waiting",
"totalRoundTripTime": 0,
"transportId": "T01",
"writable": false
},
{
"id": "CP70BEs/fi_vAg2mi4W",
"timestamp": 1772304508207.719,
"type": "candidate-pair",
"bytesDiscardedOnSend": 0,
"bytesReceived": 0,
"bytesSent": 0,
"consentRequestsSent": 0,
"localCandidateId": "I70BEs/fi",
"nominated": false,
"packetsDiscardedOnSend": 0,
"packetsReceived": 0,
"packetsSent": 0,
"priority": 9114756780654476000,
"remoteCandidateId": "IvAg2mi4W",
"requestsReceived": 0,
"requestsSent": 0,
"responsesReceived": 0,
"responsesSent": 0,
"state": "waiting",
"totalRoundTripTime": 0,
"transportId": "T01",
"writable": false
},
{
"id": "CPCI9ZC9o4_0ExDz0x8",
"timestamp": 1772304508207.719,
"type": "candidate-pair",
"bytesDiscardedOnSend": 0,
"bytesReceived": 0,
"bytesSent": 0,
"consentRequestsSent": 0,
"localCandidateId": "ICI9ZC9o4",
"nominated": false,
"packetsDiscardedOnSend": 0,
"packetsReceived": 0,
"packetsSent": 0,
"priority": 9114756780654476000,
"remoteCandidateId": "I0ExDz0x8",
"requestsReceived": 0,
"requestsSent": 4,
"responsesReceived": 0,
"responsesSent": 0,
"state": "in-progress",
"totalRoundTripTime": 0,
"transportId": "T01",
"writable": false
},
{
"id": "CPCI9ZC9o4_8tjtCZH0",
"timestamp": 1772304508207.719,
"type": "candidate-pair",
"bytesDiscardedOnSend": 0,
"bytesReceived": 0,
"bytesSent": 0,
"consentRequestsSent": 0,
"localCandidateId": "ICI9ZC9o4",
"nominated": false,
"packetsDiscardedOnSend": 0,
"packetsReceived": 0,
"packetsSent": 0,
"priority": 9114475305677766000,
"remoteCandidateId": "I8tjtCZH0",
"requestsReceived": 0,
"requestsSent": 4,
"responsesReceived": 0,
"responsesSent": 0,
"state": "in-progress",
"totalRoundTripTime": 0,
"transportId": "T01",
"writable": false
},
{
"id": "CPCI9ZC9o4_vAg2mi4W",
"timestamp": 1772304508207.719,
"type": "candidate-pair",
"bytesDiscardedOnSend": 0,
"bytesReceived": 0,
"bytesSent": 0,
"consentRequestsSent": 3,
"currentRoundTripTime": 0,
"localCandidateId": "ICI9ZC9o4",
"nominated": false,
"packetsDiscardedOnSend": 0,
"packetsReceived": 0,
"packetsSent": 0,
"priority": 9115038255631187000,
"remoteCandidateId": "IvAg2mi4W",
"requestsReceived": 4,
"requestsSent": 4,
"responsesReceived": 4,
"responsesSent": 4,
"state": "succeeded",
"totalRoundTripTime": 0.002,
"transportId": "T01",
"writable": true
},
{
"id": "CPIZ2Ffhfk_0ExDz0x8",
"timestamp": 1772304508207.719,
"type": "candidate-pair",
"bytesDiscardedOnSend": 0,
"bytesReceived": 0,
"bytesSent": 0,
"consentRequestsSent": 0,
"localCandidateId": "IIZ2Ffhfk",
"nominated": false,
"packetsDiscardedOnSend": 0,
"packetsReceived": 0,
"packetsSent": 0,
"priority": 9114475305677635000,
"remoteCandidateId": "I0ExDz0x8",
"requestsReceived": 0,
"requestsSent": 4,
"responsesReceived": 0,
"responsesSent": 0,
"state": "in-progress",
"totalRoundTripTime": 0,
"transportId": "T01",
"writable": false
},
{
"id": "CPIZ2Ffhfk_8tjtCZH0",
"timestamp": 1772304508207.719,
"type": "candidate-pair",
"bytesDiscardedOnSend": 0,
"bytesReceived": 0,
"bytesSent": 0,
"consentRequestsSent": 3,
"currentRoundTripTime": 0,
"localCandidateId": "IIZ2Ffhfk",
"nominated": false,
"packetsDiscardedOnSend": 0,
"packetsReceived": 0,
"packetsSent": 0,
"priority": 9114475305677503000,
"remoteCandidateId": "I8tjtCZH0",
"requestsReceived": 4,
"requestsSent": 4,
"responsesReceived": 4,
"responsesSent": 4,
"state": "succeeded",
"totalRoundTripTime": 0.002,
"transportId": "T01",
"writable": true
},
{
"id": "CPIZ2Ffhfk_vAg2mi4W",
"timestamp": 1772304508207.719,
"type": "candidate-pair",
"bytesDiscardedOnSend": 0,
"bytesReceived": 0,
"bytesSent": 0,
"consentRequestsSent": 0,
"localCandidateId": "IIZ2Ffhfk",
"nominated": false,
"packetsDiscardedOnSend": 0,
"packetsReceived": 0,
"packetsSent": 0,
"priority": 9114475305677766000,
"remoteCandidateId": "IvAg2mi4W",
"requestsReceived": 0,
"requestsSent": 0,
"responsesReceived": 0,
"responsesSent": 0,
"state": "waiting",
"totalRoundTripTime": 0,
"transportId": "T01",
"writable": false
}
],
"localCandidate": [
{
"id": "I70BEs/fi",
"timestamp": 1772304508207.719,
"type": "local-candidate",
"address": "172.24.64.1",
"candidateType": "host",
"foundation": "3867556668",
"ip": "172.24.64.1",
"isRemote": false,
"networkType": "ethernet",
"port": 52022,
"priority": 2122194687,
"protocol": "udp",
"transportId": "T01",
"usernameFragment": "Jmb2"
},
{
"id": "ICI9ZC9o4",
"timestamp": 1772304508207.719,
"type": "local-candidate",
"address": "169.254.83.107",
"candidateType": "host",
"foundation": "2880758781",
"ip": "169.254.83.107",
"isRemote": false,
"networkType": "unknown",
"port": 52021,
"priority": 2122260223,
"protocol": "udp",
"transportId": "T01",
"usernameFragment": "Jmb2"
},
{
"id": "IIZ2Ffhfk",
"timestamp": 1772304508207.719,
"type": "local-candidate",
"address": "192.168.1.36",
"candidateType": "host",
"foundation": "3097113718",
"ip": "192.168.1.36",
"isRemote": false,
"networkType": "wifi",
"port": 52023,
"priority": 2122129151,
"protocol": "udp",
"transportId": "T01",
"usernameFragment": "Jmb2"
}
],
"remoteCandidate": [
{
"id": "I0ExDz0x8",
"timestamp": 1772304508207.719,
"type": "remote-candidate",
"address": "172.24.64.1",
"candidateType": "host",
"foundation": "3324682216",
"ip": "172.24.64.1",
"isRemote": true,
"port": 52028,
"priority": 2122194687,
"protocol": "udp",
"transportId": "T01",
"usernameFragment": "4dWq"
},
{
"id": "I8tjtCZH0",
"timestamp": 1772304508207.719,
"type": "remote-candidate",
"address": "192.168.1.36",
"candidateType": "host",
"foundation": "1350380393",
"ip": "192.168.1.36",
"isRemote": true,
"port": 52029,
"priority": 2122129151,
"protocol": "udp",
"transportId": "T01",
"usernameFragment": "4dWq"
},
{
"id": "IvAg2mi4W",
"timestamp": 1772304508207.719,
"type": "remote-candidate",
"address": "169.254.83.107",
"candidateType": "host",
"foundation": "704929558",
"ip": "169.254.83.107",
"isRemote": true,
"port": 52027,
"priority": 2122260223,
"protocol": "udp",
"transportId": "T01",
"usernameFragment": "4dWq"
}
],
"transport": [
{
"id": "T01",
"timestamp": 1772304508207.719,
"type": "transport",
"bytesReceived": 4537,
"bytesSent": 181656,
"dtlsCipher": "TLS_AES_128_GCM_SHA256",
"dtlsRole": "server",
"dtlsState": "connected",
"iceLocalUsernameFragment": "Jmb2",
"iceRole": "controlling",
"iceState": "connected",
"localCertificateId": "CF98:F5:BA:3A:49:37:B2:00:1E:60:86:92:E1:80:90:30:7E:01:18:16:67:02:55:35:FD:5F:55:7F:14:F2:CD:5B",
"packetsReceived": 89,
"packetsSent": 413,
"remoteCertificateId": "CF6F:57:07:F0:A8:A1:3C:79:61:5C:C8:EA:6D:EC:9D:0D:34:53:B5:41:EE:84:3F:AB:C8:55:56:DF:CE:53:03:BF",
"selectedCandidatePairChanges": 1,
"selectedCandidatePairId": "CP70BEs/fi_0ExDz0x8",
"srtpCipher": "AES_CM_128_HMAC_SHA1_80",
"tlsVersion": "FEFC"
}
],
"codec": [
{
"id": "COT01_111_minptime=10;useinbandfec=1",
"timestamp": 1772304508207.719,
"type": "codec",
"channels": 2,
"clockRate": 48000,
"mimeType": "audio/opus",
"payloadType": 111,
"sdpFmtpLine": "minptime=10;useinbandfec=1",
"transportId": "T01"
},
{
"id": "COT01_96",
"timestamp": 1772304508207.719,
"type": "codec",
"clockRate": 90000,
"mimeType": "video/VP8",
"payloadType": 96,
"transportId": "T01"
}
],
"dataChannel": [],
"mediaSources": [
{
"id": "SA1",
"timestamp": 1772304508207.719,
"type": "media-source",
"kind": "audio",
"trackIdentifier": "02cec5a8-8e24-4be2-af4d-f8bb663751bc",
"audioLevel": 0.0011291848506118961,
"echoReturnLoss": -30,
"echoReturnLossEnhancement": 0.17551203072071075,
"totalAudioEnergy": 0.0003236929543481816,
"totalSamplesDuration": 4.999999999999938
},
{
"id": "SV2",
"timestamp": 1772304508207.719,
"type": "media-source",
"kind": "video",
"trackIdentifier": "b8ca9af1-c030-4796-9dc4-16c8e5ed46fb",
"frames": 48,
"framesPerSecond": 10,
"height": 480,
"width": 640
}
],
"peerConnection": [
{
"id": "P",
"timestamp": 1772304508207.719,
"type": "peer-connection",
"dataChannelsClosed": 0,
"dataChannelsOpened": 0
}
],
"tracks": [],
"raw": {
"inbound-rtp": [],
"outbound-rtp": [
{
"id": "OT01A450088848",
"timestamp": 1772304508207.719,
"type": "outbound-rtp",
"codecId": "COT01_111_minptime=10;useinbandfec=1",
"kind": "audio",
"mediaType": "audio",
"ssrc": 450088848,
"transportId": "T01",
"bytesSent": 16112,
"packetsSent": 248,
"active": true,
"headerBytesSent": 6944,
"mediaSourceId": "SA1",
"mid": "0",
"nackCount": 0,
"packetsSentWithEct1": 0,
"remoteId": "RIA450088848",
"retransmittedBytesSent": 0,
"retransmittedPacketsSent": 0,
"targetBitrate": 32000,
"totalPacketSendDelay": 0
},
{
"id": "OT01V310911517",
"timestamp": 1772304508207.719,
"type": "outbound-rtp",
"codecId": "COT01_96",
"kind": "video",
"mediaType": "video",
"ssrc": 310911517,
"transportId": "T01",
"bytesSent": 148188,
"packetsSent": 157,
"active": true,
"encoderImplementation": "libvpx",
"encodingIndex": 0,
"firCount": 0,
"frameHeight": 240,
"frameWidth": 320,
"framesEncoded": 46,
"framesPerSecond": 10,
"framesSent": 46,
"headerBytesSent": 5272,
"hugeFramesSent": 1,
"keyFramesEncoded": 1,
"mediaSourceId": "SV2",
"mid": "1",
"nackCount": 0,
"packetsSentWithEct1": 0,
"pliCount": 0,
"powerEfficientEncoder": false,
"qpSum": 294,
"qualityLimitationDurations": {
"bandwidth": 4.922,
"cpu": 0,
"none": 0.047,
"other": 0
},
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]
}
}
}
]
}Contributing
Contributions are welcome! Feel free to open an issue or submit a pull request.