Mux Live Stream With Simulcast Target

arazzo: 1.0.1
info:
  title: Mux Live Stream With Simulcast Target
  summary: Create a live stream, read it back, add an RTMP simulcast target, and confirm the target is registered.
  description: >-
    Stands up a Mux Video live stream and restreams it to a third party RTMP
    destination such as YouTube or Twitch. The workflow creates a live stream
    with a public playback policy, reads the stream back to capture its stream
    key, adds a simulcast target pointing at the external RTMP endpoint, and then
    reads that simulcast target to confirm it was created. Every step spells out
    its request inline so the flow can be read and executed without opening the
    underlying OpenAPI description.
  version: 1.0.0
  x-realizes-capability-ids:
  - BC-3740.20
  x-capability-derivation:
    method: 'deterministic join: sourceDescriptions -> per-tag OpenAPI -> tag/capability edge. No classification at this step.'
    min_confidence: 0.7
    sources:
    - capability_id: BC-3740.20
      capability_name: OTT & Streaming Delivery
      spec: mux-com-live-streams-api-openapi.yml
      confidence: 0.8
    model: Turbo EA Capabilities by Vincent Verdet — Turbo EA, https://github.com/vincentmakes/turbo-ea-capabilities, CC BY 4.0
sourceDescriptions:
- name: liveStreamsApi
  url: ../openapi/mux-com-live-streams-api-openapi.yml
  type: openapi
workflows:
- workflowId: live-stream-with-simulcast
  summary: Create a live stream and attach a simulcast target, then verify the target.
  description: >-
    Creates a live stream, reads its stream key, adds an RTMP simulcast target,
    and reads the target back to confirm.
  inputs:
    type: object
    required:
    - simulcastUrl
    - simulcastStreamKey
    properties:
      simulcastUrl:
        type: string
        description: The RTMP(s) endpoint of the third party destination (e.g. rtmp://live.example.com/app).
      simulcastStreamKey:
        type: string
        description: The stream key on the third party service to send the parent live stream to.
      latencyMode:
        type: string
        description: Latency mode for the live stream (low, reduced, or standard).
        default: low
  steps:
  - stepId: createLiveStream
    description: >-
      Create a live stream with a public playback policy so it can be viewed and
      restreamed.
    operationId: create-live-stream
    requestBody:
      contentType: application/json
      payload:
        playback_policies:
        - public
        latency_mode: $inputs.latencyMode
    successCriteria:
    - condition: $statusCode == 201
    outputs:
      liveStreamId: $response.body#/data/id
      streamKey: $response.body#/data/stream_key
      status: $response.body#/data/status
  - stepId: getLiveStream
    description: >-
      Read the live stream back to confirm it exists and capture its current
      status and stream key.
    operationId: get-live-stream
    parameters:
    - name: LIVE_STREAM_ID
      in: path
      value: $steps.createLiveStream.outputs.liveStreamId
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      liveStreamId: $response.body#/data/id
      status: $response.body#/data/status
      streamKey: $response.body#/data/stream_key
  - stepId: addSimulcastTarget
    description: >-
      Add a simulcast target so the live stream is restreamed to the third party
      RTMP destination.
    operationId: create-live-stream-simulcast-target
    parameters:
    - name: LIVE_STREAM_ID
      in: path
      value: $steps.createLiveStream.outputs.liveStreamId
    requestBody:
      contentType: application/json
      payload:
        url: $inputs.simulcastUrl
        stream_key: $inputs.simulcastStreamKey
    successCriteria:
    - condition: $statusCode == 201
    outputs:
      simulcastTargetId: $response.body#/data/id
      simulcastStatus: $response.body#/data/status
  - stepId: verifySimulcastTarget
    description: >-
      Read the simulcast target back to confirm it is registered against the
      live stream.
    operationId: get-live-stream-simulcast-target
    parameters:
    - name: LIVE_STREAM_ID
      in: path
      value: $steps.createLiveStream.outputs.liveStreamId
    - name: SIMULCAST_TARGET_ID
      in: path
      value: $steps.addSimulcastTarget.outputs.simulcastTargetId
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      simulcastTargetId: $response.body#/data/id
      simulcastStatus: $response.body#/data/status
  outputs:
    liveStreamId: $steps.getLiveStream.outputs.liveStreamId
    streamKey: $steps.getLiveStream.outputs.streamKey
    simulcastTargetId: $steps.verifySimulcastTarget.outputs.simulcastTargetId
    simulcastStatus: $steps.verifySimulcastTarget.outputs.simulcastStatus