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A transcript started event emits when Daily begins to transcribe a call. These can be activated via startTranscription(), via the REST API, or from within your client.

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Common fields

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version
string
Represents the version of the event. Uses semantic versioning to inform a consumer if the payload has introduced any breaking changes.
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type
string
Represents the type of the event described in the payload.
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id
string
An identifier representing this specific event.
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payload
object
An object representing the event, whose fields are described below.
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event_ts
number
Documenting when the webhook itself was sent. This timestamp is different than the time of the event the webhook describes.

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Payload

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id
string
The unique identifier for the transcription event.
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info
object
Additional information related to the transcription event.
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room_id
string
The ID of the room where the event occurred.
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room_name
string
The name of the room where the event occurred.
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mtg_session_id
string
The meeting session ID related to the event.
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max_participants
integer
The maximum number of participants allowed in the transcription session.
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duration
integer
The duration of the session in seconds.
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participant_minutes
integer
The cumulative participant minutes for the transcription session.
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status
string
The current status of the transcription event.
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out_params
object
The output parameters of the transcription event.
{
  "version": "1.1.0",
  "type": "transcript.started",
  "id": "3431-tra-sta-68f65d4c-a4dc-4179-bbb1-c12432afb924",
  "payload": {
    "id": "68f65d4c-a4dc-4179-bbb1-c12432afb924",
    "info": {
      "instanceId": "a1f2f6b7-b1ac-4202-85e5-d446cb6c3d3f"
    },
    "room_id": "9e3c9e1b-bfbe-4753-b908-fd89cecfd4a7",
    "room_name": "my-transcript-room",
    "mtg_session_id": "a2bc876d-2816-4732-9c87-01e0b8c0b01b",
    "max_participants": 1,
    "duration": 0,
    "participant_minutes": 0,
    "status": "t_in_progress",
    "out_params": {
      "s3": {
        "key": "domain/room/1733234355482.vtt",
        "bucket": "daily-co-transcription-staging",
        "region": "us-west-2"
      }
    }
  },
  "event_ts": 1733234355.505
}