Video Style Transfer

Use CometAPI’s Runway Video to Video Style Redraw endpoint to restyle videos via POST /runway/pro/video2video with X-Runway-Version support.

POST /runway/pro/video2video

Video to Video Style Redraw

cURL

curl --request POST \
  --url https://api.cometapi.com/runway/pro/video2video \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "callback_url": "http://baidu.com",
  "video": "http://runwaycdn.rixapi.com/attachments/video/runway/20241015/82bc23c83b5c32e75059c8328df5cffb.mp4",
  "model": "gen4",
  "prompt": "pixelated style",
  "options": {
    "structure_transformation": 0.5,
    "flip": true
  }
}
'

200

{
  "code": 123,
  "msg": "<string>",
  "data": {
    "task_id": "<string>",
    "state": "<string>",
    "status": "<string>",
    "prompt": "<string>",
    "prompt_en": "<string>",
    "video_url": "<string>",
    "last_frame": "<string>",
    "msg": "<string>",
    "create_time": "<string>",
    "update_time": "<string>",
    "poster": "<string>"
  },
  "exec_time": 123
}

Use this endpoint to restyle an existing video through the Runway reverse-format wrapper.

Before you call it

• Send the required X-Runway-Version header, for example 2024-11-06
• Provide a stable source video URL
• Use model: gen4
• Start with a modest structure_transformation value before pushing the style transfer harder

Task flow

1. Submit the restyle task

   Send the source video, prompt, and options, then save the returned task id.

2. Poll task status

   Continue with Feed Get Task until the wrapper reaches a terminal state.

3. Store the finished render

   Copy the final output into your own storage if you need it beyond the provider delivery window.

Authorizations

Authorization · string · header · required

Bearer token authentication. Use your CometAPI key.

Headers

X-Runway-Version · string

Optional Runway version header, for example 2024-11-06.

Body

application/json

callback_url · string · default: https://example.com/webhook · required

Webhook URL that receives a POST request with the result when the task completes.

video · string · default: http://runwaycdn.rixapi.com/attachments/video/runway/20241015/82bc23c83b5c32e75059c8328df5cffb.mp4 · required

URL of the source video to restyle.

model · string · default: gen4 · required

Model version to use, e.g. gen4.

prompt · string · default: Apply a pixel-art redraw style. · required

Text prompt describing the target style for the redraw.

options · object · required

Additional processing options.

Show child attributes

Response

200 - application/json

OK

code · integer · required

HTTP status code, 200 indicates success

msg · string · required

Return information, describes the request result

data · object · required

Specific response data

Show child attributes

exec_time · number · required

Time spent by the server to process this request