Generate AI Video

video Runway price on request

Request

POST https://app.video-blade.com/api/v1/generations
X-API-Key: vb_…
Content-Type: application/json

{
  "callback_url": "https://your-app.example/callbacks/video-blade",
  "input": {
    "duration": "\u2026",
    "prompt": "\u2026",
    "quality": "\u2026"
  },
  "model": "runway-generate-ai-video"
}

Input parameters

Name	Type	Required	Description
`prompt`	string	required	Descriptive text that guides the AI video generation. Be specific about subject, action, style, and setting. When used with an image, describes how to animate or modify the image content. Maximum length is 1800 characters.
`image_url`	string	optional	Optional reference image URL to base the video on. When provided, the AI will create a video animating or extending this image.
`duration`	number	required	Video duration, optional values are 5 or 10. If 10-second video is selected, 1080p resolution cannot be used
`quality`	string	required	Video resolution, optional values are 720p or 1080p. If 1080p is selected, 10-second video cannot be generated
`aspect_ratio`	string	optional	Video aspect ratio parameter. Required parameter for text-to-video generation requests. This parameter is invalid when image_url is passed, and the aspect ratio will ultimately be determined by the provided image. Values: `16:9`, `4:3`, `1:1`, `3:4`, `9:16`
`watermark`	string	optional	Video watermark text content. An empty string indicates no watermark, while a non-empty string will display the specified text as a watermark in the bottom right corner of the video.

Pricing

Price on request; the charge is settled from actual consumption with the video coefficient ×2.0. See Pricing & tokens.