Status Callbacks
Status Callbacks allow you to receive events related to the REST resources managed by Twilio: Rooms, Recordings, and Compositions.
All HTTP requests set the Content-Type header to "application/x-www-form-urlencoded".
Rooms Status Callbacks allow you to receive events related to your Rooms via HTTP request. Configure a StatusCallback URL when creating a Room using the REST API, and Twilio will make an HTTP request (webhook) to that URL whenever an event takes place in the Room.
The Rooms API will generate the following Status Callback events.
The following events are dispatched to webhook URL specified at Room creation.
| Event | Description |
|---|---|
| room-created | Room created. |
| room-ended | Room completed. (Note: Rooms created by the REST API will fire a room-ended event when the room is empty for the amount of time configured as the "unused room timeout" or "empty room timeout" value. Both the unused room timeout and empty room timeout values are 5 minutes by default. See Understanding Video Rooms for more information.) |
| participant-connected | Participant joined the Room. |
| participant-disconnected | Participant left the Room. |
| track-added | Participant added a Track. |
| track-removed | Participant removed a Track. |
| track-enabled | Participant unpaused a Track. |
| track-disabled | Participant paused a Track. |
| recording-started | Recording for a Track began |
| recording-completed | Recording for a Track completed |
| recording-failed | Failure during a recording operation request |
A curl example of configuring the StatusCallback URL.
1curl -XPOST 'https://video.twilio.com/v1/Rooms' \2-u '{API Key SID}:{API Secret}' \3-d 'UniqueName=DailyStandup' \4-d 'StatusCallback=https://hooks.example.com/room-events' \5-d 'StatusCallbackMethod=POST'
Twilio passes the following parameters in each of the above-listed events whenever it makes an HTTP request to the StatusCallback URL you've set:
| Parameter | Event | Description |
|---|---|---|
| AccountSid | All | The AccountSid associated with this Room |
| RoomName | All | The UniqueName of the Room generating this event. |
| RoomSid | All | The Sid of the Room generating this event. |
| RoomStatus | All | The Status of the Room generating this event. |
| RoomType | All | The Type of the Room generating this event. |
| StatusCallbackEvent | All | The Room event. For example, room-created. See Rooms Status Callback Events for the complete list. |
| Timestamp | All | Time of the event, conformant to UTC ISO 8601 Timestamp. |
| ParticipantSid | All Participant and Track Events | The Sid for the Participant generating this event. |
| ParticipantStatus | All Participant and Track Events | The current Status of the Participant generating this event - either connected or disconnected. |
| ParticipantDuration | Only on participant-disconnected event | The total duration the Participant remained connected to the Room. |
| ParticipantIdentity | All Participant and Track Events | The Identity of the Participant generating this event. Participant identities are set via the Participant's Access Token |
| RoomDuration | Only on room-ended | The total duration of the Room, in seconds. |
| SequenceNumber | All | This is an internal field and does not represent the true order of this event in the Room. Use the Timestamp field to track the order of this event in relation to other Room events. |
| TrackSid | All Track events | The Sid of the Track. |
| TrackKind | All Track events | The Kind of the Track (data, audio or video). |
The parameters below are included only in events related to Recordings.
| Parameter | Event type | Description |
|---|---|---|
| AccountSid | All recording-* events | Twilio Account SID. |
| RecordingSid | All recording-* events | RecordingSID. |
| Timestamp | All recording-* events | Time of the event, conformant to UTC ISO 8601 Timestamp. |
| StatusCallbackEvent | All recording-* events | The Room event. For example, recording-started. |
| RoomSid | All recording-* events | The Sid of the Room generating this recording. |
| RoomName | All recording-* events | The given name of the Room generating this recording. |
| RoomType | All | The Type of the Room generating this event. |
| ParticipantSid | All recording-* events | The Sid of the Participant generating this recording. |
| SourceSid | All recording-* events | This recording's source TrackSID, MTxxx. |
| RecordingUri | All recording-* events | The relative URL to retrieve this recording's metadata. |
| MediaUri | Only on recording-completed | URL to fetch the generated media. |
| Duration | Only on recording-completed | Duration of the recording. |
| Size | Only on recording-completed | Total number of bytes recorded. |
| MediaExternalLocation | Only on recording-completed | URL to fetch the generated media if stored in external storage. |
| Container | All recording-* events | Container of the recording. Container used are mka for audio recordings and mkv for video recordings. |
| Codec | All recording-* events | Codec used for this recording. This could be PCMU or OPUS for audio recordings, and VP8 or H264 for video recordings. |
| ParticipantIdentity | All recording-* events | The Identity of the Participant generating this event. Participant identities are set via the Participant's Access Token. |
| TrackName | All recording-* events | The name that was given to the source track of this recording. If no name is given, the SourceSid is used. |
| OffsetFromTwilioVideoEpoch | All recording-* events | The time in milliseconds elapsed between an arbitrary point in time, common to all Rooms, and the moment when the source room of this track started. This information provides a synchronization mechanism for recordings belonging to the same room. |
| Type | All recording-* events | The type of track for this recording, audio or video. |
| FailedOperation | Only on recording-failed | Operation that failed: RecordingStart, RecordingComplete, RecordingUpload. |
Composition Status Callbacks allow you to receive events related to your Compositions via HTTP request.
You can configure the StatusCallback URL to receive your callbacks using two mechanisms:
- When you create a Composition using directly the REST API, you can set the
StatusCallbackURL as aPOSTparameter. In this case, at that URL you will only receive events related to that specific Composition. - When you create a Composition Hook, you can set the
StatusCallbackURL at such Hook. In this case, at that URL you will receive events regarding that Hook as well as events regarding all Compositions created by such Hook.
Twilio will generate the following Status Callback events regarding your Compositions and Composition Hooks.
The following events are dispatched to Compositions and Composition Hooks StatusCallback URLs.
| Event | Description |
|---|---|
| composition-enqueued | A new Composition has been created and enqueued for processing, but processing has not yet started. This event is only fired when the Composition is created through a Composition Hook. |
| composition-hook-failed | The Hook failed to create a new Composition. |
| composition-started | The media processing task started. |
| composition-available | The media processing tasks completed and the Composition media file can be downloaded. |
| composition-progress | Progress report for the media composition task, sent approximately every 10%. |
| composition-failed | The media processing task failed. |
The parameters below are included in the composition-* events.
| Parameter | Event type | Description |
|---|---|---|
| AccountSid | All composition-* events | Twilio Account SID. |
| RoomSid | All composition-* events | SID of the Room being the source of tracks for this Composition |
| HookSid | composition-enqueued and composition-hook-failed | SID of the Composition Hook |
| HookUri | composition-enqueued and composition-hook-failed | The relative URL to retrieve the Composition Hook metadata. |
| HookFriendlyName | composition-enqueued and composition-hook-failed | The friendly name of the Composition Hook. |
| CompositionSid | All composition-* events except for composition-hook-failed | SID of the Composition. |
| CompositionUri | All composition-* events except for composition-hook-failed | The relative URL to retrieve the Composition's metadata. |
| MediaUri | Only on composition-available | The relative URL to fetch the composed media. |
| Duration | Only on composition-available | Duration of the composition. |
| Size | Only on composition-available | Total number of bytes of the resulting composition. |
| MediaExternalLocation | Only on composition-available | URL to fetch the generated media if stored in external storage. |
| PercentageDone | Only on composition-progress | Percentage of composition done. |
| SecondsRemaining | Only on composition-progress | Estimated time remaining for the composition job to be finished (in seconds). |
| FailedOperation | composition-failed and composition-hook-failed | Operation that failed. |
| ErrorMessage | composition-failed and composition-hook-failed | Human-readable message that provides more information about the error. |
| StatusCallbackEvent | All composition-* events | The Composition event. For example, composition-started. |
| Timestamp | All composition-* events | Time of the event, conformant to UTC ISO 8601 Timestamp. |