---
title: "POST video.live_stream.simulcast_target.broadcasting"
method: POST
path: "video.live_stream.simulcast_target.broadcasting"
---

# POST video.live_stream.simulcast_target.broadcasting

`POST video.live_stream.simulcast_target.broadcasting` (webhook)

## Payload

- object
  - `type` 'video.live_stream.simulcast_target.broadcasting', required — Type for the webhook event
  - `id` string, required — Unique identifier for the event
  - `created_at` string, date-time, required — Time the event was created
  - `object` object, required
    - `type` string, required
    - `id` string, required
  - `environment` object, required
    - `name` string, required — Name for the environment
    - `id` string, required — Unique identifier for the environment
  - `attempts` object[], required — Attempts for sending out the webhook event
    - `webhook_id` integer — Unique identifier for the webhook
    - `response_status_code` integer — HTTP response status code for the webhook attempt
    - `response_headers` object — HTTP response headers for the webhook attempt
    - `response_body` string, nullable — HTTP response body for the webhook attempt
    - `max_attempts` integer — Max attempts number for the webhook attempt
    - `id` string — Unique identifier for the webhook attempt
    - `created_at` string, date-time — Time the webhook request was attempted
    - `address` string — URL address for the webhook attempt
  - `request_id` string, nullable
  - `accessor` string, nullable
  - `accessor_source` string, nullable
  - `data` object, required
    - `id` string, required — ID of the Simulcast Target
    - `passthrough` string — Arbitrary user-supplied metadata set when creating a simulcast target.
    - `status` 'idle' | 'starting' | 'broadcasting' | 'errored', required — The current status of the simulcast target. See Statuses below for detailed description. * `idle`: Default status. When the parent live stream is in disconnected status, simulcast targets will be idle state. * `starting`: The simulcast target transitions into this state when the parent live stream transition into connected state. * `broadcasting`: The simulcast target has successfully connected to the third party live streaming service and is pushing video to that service. * `errored`: The simulcast target encountered an error either while attempting to connect to the third party live streaming service, or mid-broadcasting. When a simulcast target has this status it will have an `error_severity` field with more details about the error.
    - `stream_key` string — Stream Key represents a stream identifier on the third party live streaming service to send the parent live stream to. Only used for RTMP(s) simulcast destinations.
    - `url` string, required — The RTMP(s) or SRT endpoint for a simulcast destination. * For RTMP(s) destinations, this should include the application name for the third party live streaming service, for example: `rtmp://live.example.com/app`. * For SRT destinations, this should be a fully formed SRT connection string, for example: `srt://srt-live.example.com:1234?streamid={stream_key}&passphrase={srt_passphrase}`. Note: SRT simulcast targets can only be used when an source is connected over SRT.
    - `error_severity` 'normal' | 'fatal' — The severity of the error encountered by the simulcast target. This field is only set when the simulcast target is in the `errored` status. See the values of severities below and their descriptions. * `normal`: The simulcast target encountered an error either while attempting to connect to the third party live streaming service, or mid-broadcasting. A simulcast may transition back into the broadcasting state if a connection with the service can be re-established. * `fatal`: The simulcast target is incompatible with the current input to the parent live stream. No further attempts to this simulcast target will be made for the current live stream asset.
    - `live_stream_id` string — Unique identifier for the Live Stream. Max 255 characters.

## Acknowledgement `200`

Return a 200 to indicate that the data was received successfully

---

[API](https://skmtc.net/muxinc/apis/mux-api.md) · [All operations](https://skmtc.net/muxinc/apis/mux-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/muxinc/mux-api/revisions/34a65dce0f31/schema)