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Endpoint: POST https://fal.run/fal-ai/veo3.1/extend-video Endpoint ID: fal-ai/veo3.1/extend-video

Try it in the Playground

Run this model interactively with your own prompts.

Quick Start

Capabilities

  • Text prompt input
  • Aspect ratio control
  • Duration control
  • Negative prompts
  • Reproducible generation (seed)
  • Video input

API Reference

Input Schema

string
required
The text prompt describing how the video should be extended
AspectRatioEnum
default:"auto"
The aspect ratio of the generated video. Default value: "auto"Possible values: auto, 16:9, 9:16
string
default:"7s"
The duration of the generated video. Default value: "7s"
string
A negative prompt to guide the video generation.
string
default:"720p"
The resolution of the generated video. Default value: "720p"
boolean
default:"true"
Whether to generate audio for the video. Default value: true
integer
The seed for the random number generator.
boolean
default:"false"
Whether to automatically attempt to fix prompts that fail content policy or other validation checks by rewriting them.
SafetyToleranceEnum
default:"4"
The safety tolerance level for content moderation. 1 is the most strict (blocks most content), 6 is the least strict. Default value: "4"Possible values: 1, 2, 3, 4, 5, 6
string
required
URL of the video to extend. The video should be 720p or 1080p resolution in 16:9 or 9:16 aspect ratio.

Output Schema

File
required
The extended video.

Input Example

Output Example

Limitations

  • aspect_ratio restricted to: auto, 16:9, 9:16
  • safety_tolerance restricted to: 1, 2, 3, 4, 5, 6