Seedance 2.5 FLF2V 480p: Keyframe Transitions on Models and API | RunComfy

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/bytedance/seedance-2.5/first-last-frame/480p \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "Smooth cinematic transition from an overcast empty coastal highway to the same overlook at golden hour with a dark blue station wagon driving past, natural cloud and light change, gentle push-in, continuous motion, photorealistic, no text, no watermark.",
    "first_frame": "https://playgrounds-storage-public.runcomfy.net/tools/7404/media-files/input-first-1.png",
    "last_frame": "https://playgrounds-storage-public.runcomfy.net/tools/7404/media-files/input-last-1.png"
  }'

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/status \
  --header "Authorization: Bearer <token>"

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/result \
  --header "Authorization: Bearer <token>"

curl --request POST \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/cancel \
  --header "Authorization: Bearer <token>"

{
  "type": "object",
  "title": "modelApiDoc_navInputSchema",
  "required": [
    "prompt",
    "first_frame",
    "last_frame"
  ],
  "properties": {
    "prompt": {
      "title": "Prompt",
      "description": "Text prompt describing the transition and motion.",
      "type": "string",
      "default": "Smooth cinematic transition from an overcast empty coastal highway to the same overlook at golden hour with a dark blue station wagon driving past, natural cloud and light change, gentle push-in, continuous motion, photorealistic, no text, no watermark."
    },
    "first_frame": {
      "title": "First Frame",
      "description": "Starting keyframe image for the video transition.",
      "type": "string",
      "default": "https://playgrounds-storage-public.runcomfy.net/tools/7404/media-files/input-first-1.png"
    },
    "last_frame": {
      "title": "Last Frame",
      "description": "Ending keyframe image for the video transition.",
      "type": "string",
      "default": "https://playgrounds-storage-public.runcomfy.net/tools/7404/media-files/input-last-1.png"
    },
    "duration": {
      "title": "Duration (seconds)",
      "description": "The duration of the generated video in seconds. Default is 5. Range is 4–30.",
      "type": "integer",
      "minimum": 4,
      "maximum": 30,
      "default": 5
    },
    "aspect_ratio": {
      "title": "Aspect Ratio (W:H)",
      "description": "Aspect ratio of the output video.",
      "type": "string",
      "enum": [
        "16:9",
        "9:16",
        "1:1",
        "4:3",
        "3:4",
        "21:9",
        "9:21"
      ],
      "default": "16:9"
    },
    "seed": {
      "title": "Seed",
      "description": "Random seed for reproducible generation. Use -1 for random.",
      "type": "integer"
    }
  }
}