Hedra — Generate a video from a start image

arazzo: 1.0.1
info:
  title: Hedra — Generate a video from a start image
  version: 1.0.0
  summary: Upload a start keyframe image, submit a video generation, and poll for the result.
sourceDescriptions:
- name: hedra
  url: ../openapi/hedra-web-api-openapi-original.json
  type: openapi
workflows:
- workflowId: generateVideo
  summary: Reserve and upload an image asset, submit a video generation, poll to completion.
  inputs:
    type: object
    required: [api_key, image_name, text_prompt]
    properties:
      api_key: { type: string }
      image_name: { type: string }
      text_prompt: { type: string }
      model_slug: { type: string, default: "" }
  steps:
  - stepId: reserveAsset
    description: Create (reserve) an image asset to upload the start keyframe into.
    operationId: create_asset_public_assets_post
    parameters:
    - name: X-API-Key
      in: header
      value: $inputs.api_key
    requestBody:
      contentType: application/json
      payload:
        name: $inputs.image_name
        type: image
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      asset_id: $response.body#/id
  - stepId: uploadAsset
    description: Upload the image binary for the reserved asset.
    operationId: upload_asset_public_assets__id__upload_post
    parameters:
    - name: X-API-Key
      in: header
      value: $inputs.api_key
    - name: id
      in: path
      value: $steps.reserveAsset.outputs.asset_id
    successCriteria:
    - condition: $statusCode == 200
  - stepId: submitVideo
    description: Submit the video generation using the uploaded image as the start keyframe.
    operationId: generate_asset_public_generations_post
    parameters:
    - name: X-API-Key
      in: header
      value: $inputs.api_key
    requestBody:
      contentType: application/json
      payload:
        type: video
        model_slug: $inputs.model_slug
        start_keyframe_id: $steps.reserveAsset.outputs.asset_id
        generated_video_inputs:
          text_prompt: $inputs.text_prompt
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      generation_id: $response.body#/id
  - stepId: pollStatus
    description: Poll until the video generation completes.
    operationId: get_status_public_generations__generation_id__status_get
    parameters:
    - name: X-API-Key
      in: header
      value: $inputs.api_key
    - name: generation_id
      in: path
      value: $steps.submitVideo.outputs.generation_id
    successCriteria:
    - condition: $statusCode == 200
    - context: $response.body
      condition: $.status == "complete"
      type: jsonpath
    outputs:
      url: $response.body#/url
  outputs:
    generation_id: $steps.submitVideo.outputs.generation_id
    url: $steps.pollStatus.outputs.url