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Kling O1: Precision Video-to-Video Editing & Scene Consistency on playground and API | RunComfy

kling/kling-video-o1/video-to-video/edit

Transform existing footage into cinematic new scenes with Kling O1, a multimodal video-to-video model enabling seamless editing, consistent characters, and fast creative production for filmmakers and digital artists.

Table of contents

1. Get started

Use RunComfy's API to run kling/kling-video-o1/video-to-video/edit. For accepted inputs and outputs, see the model's schema.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/kling/kling-video-o1/video-to-video/edit \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "Replace the character in the video with @Element1, maintaining the same movements and camera angles. Transform the landscape into @Image1",
    "video_url": "https://playgrounds-storage-public.runcomfy.net/tools/7246/media-files/input-1-1.mp4",
    "elements": [
      {
        "frontal_image_url": "https://playgrounds-storage-public.runcomfy.net/tools/7246/media-files/input-1-2.png",
        "reference_image_urls": [
          "https://playgrounds-storage-public.runcomfy.net/tools/7246/media-files/input-1-3.jpeg"
        ]
      }
    ],
    "image_urls": [
      "https://playgrounds-storage-public.runcomfy.net/tools/7246/media-files/input-1-4.png"
    ]
  }'

2. Authentication

Set the YOUR_API_TOKEN environment variable with your API key (manage keys in your Profile) and include it on every request as a Bearer token via the Authorization header: Authorization: Bearer $YOUR_API_TOKEN.

3. API reference

Submit a request

Submit an asynchronous generation job and immediately receive a request_id plus URLs to check status, fetch results, and cancel.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/kling/kling-video-o1/video-to-video/edit \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "Replace the character in the video with @Element1, maintaining the same movements and camera angles. Transform the landscape into @Image1",
    "video_url": "https://playgrounds-storage-public.runcomfy.net/tools/7246/media-files/input-1-1.mp4",
    "elements": [
      {
        "frontal_image_url": "https://playgrounds-storage-public.runcomfy.net/tools/7246/media-files/input-1-2.png",
        "reference_image_urls": [
          "https://playgrounds-storage-public.runcomfy.net/tools/7246/media-files/input-1-3.jpeg"
        ]
      }
    ],
    "image_urls": [
      "https://playgrounds-storage-public.runcomfy.net/tools/7246/media-files/input-1-4.png"
    ]
  }'

Monitor request status

Fetch the current state for a request_id ("in_queue", "in_progress", "completed", or "cancelled").

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

Retrieve request results

Retrieve the final outputs and metadata for the given request_id; if the job is not complete, the response returns the current state so you can continue polling.

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

Cancel a request

Cancel a queued job by request_id, in-progress jobs cannot be cancelled.

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

4. File inputs

Hosted file (URL)

Provide a publicly reachable HTTPS URL. Ensure the host allows server‑side fetches (no login/cookies required) and isn't rate‑limited or blocking bots. Recommended limits: images ≤ 50 MB (~4K), videos ≤ 100 MB (~2–5 min @ 720p). Prefer stable or pre‑signed URLs for private assets.

5. Schema

Input schema

{
  "type": "object",
  "title": "Input",
  "required": [
    "prompt",
    "video_url",
    "elements",
    "image_urls"
  ],
  "properties": {
    "prompt": {
      "title": "Prompt",
      "description": "Use @Element1, @Element2 to reference elements and @Image1, @Image2 to reference images in order.",
      "type": "string",
      "default": "Replace the character in the video with @Element1, maintaining the same movements and camera angles. Transform the landscape into @Image1"
    },
    "video_url": {
      "title": "Video URL",
      "description": "Reference video URL to guide motion and scene framing. Supported formats: .mp4, .mov. Duration: 3–10 seconds. Resolution: 720p–2160p. File size: ≤200 MB.",
      "type": "string",
      "default": "https://playgrounds-storage-public.runcomfy.net/tools/7246/media-files/input-1-1.mp4"
    },
    "keep_audio": {
      "title": "Keep Audio",
      "description": "Whether to keep the original audio track from the input video.",
      "type": "boolean",
      "default": false
    },
    "image_urls": {
      "title": "Images",
      "description": "Reference images for style or appearance guidance. Referenced in the prompt as @Image1, @Image2, etc. Up to 4 images total. When using video, elements and reference images combined must not exceed 4.",
      "type": "array",
      "items": {
        "type": "string",
        "format": "image_uri"
      },
      "maxItems": 4,
      "minItems": 0,
      "default": [
        "https://playgrounds-storage-public.runcomfy.net/tools/7246/media-files/input-1-4.png"
      ]
    },
    "elements": {
      "title": "Elements",
      "description": "Provide characters/objects to include. Reference in prompt as @Element1, @Element2, etc. Maximum 7 total across elements + reference images + start image.",
      "type": "array",
      "default": [
        {
          "frontal_image_url": "https://playgrounds-storage-public.runcomfy.net/tools/7246/media-files/input-1-2.png",
          "reference_image_urls": [
            "https://playgrounds-storage-public.runcomfy.net/tools/7246/media-files/input-1-3.jpeg"
          ]
        }
      ],
      "items": {
        "frontal_image_url": {
          "title": "Frontal Image Url",
          "description": "The frontal image of the element (main view).Max file size: 10.0MB, Min width: 300px, Min height: 300px, Min aspect ratio: 0.40, Max aspect ratio: 2.50, Timeout: 20.0s",
          "type": "string",
          "format": "image_uri",
          "default": ""
        },
        "reference_image_urls": {
          "title": "Reference Image Urls",
          "description": "Additional reference images from different angles. 1-4 images supported. At least one image is required.",
          "type": "array",
          "format": "image_uris",
          "items": {
            "type": "string",
            "format": "image_uri"
          },
          "default": [],
          "maxItems": 4,
          "minItems": 1
        }
      },
      "maxItems": 7,
      "minItems": 0
    }
  }
}

Output schema

{
  "output": {
    "type": "object",
    "properties": {
      "image": {
        "type": "string",
        "format": "uri",
        "description": "single image URL"
      },
      "video": {
        "type": "string",
        "format": "uri",
        "description": "single video URL"
      },
      "images": {
        "type": "array",
        "description": "multiple image URLs",
        "items": { "type": "string", "format": "uri" }
      },
      "videos": {
        "type": "array",
        "description": "multiple video URLs",
        "items": { "type": "string", "format": "uri" }
      }
    }
  }
}
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RunComfy is the premier ComfyUI platform, offering ComfyUI online environment and services, along with ComfyUI workflows featuring stunning visuals. RunComfy also provides AI Models, enabling artists to harness the latest AI tools to create incredible art.