falVideo to videoComing soon

xai/grok-imagine-video/extend-video

Name: xai/grok-imagine-video/extend-video
Brand: fal

xai/grok-imagine-video/extend-video is a video to video tool from fal that runs in the background and returns video. Coming soon: listed with its price, not yet open to runs.

This tool is listed but not yet available to run.

Priced by usage

Pricing

$0.065 per second. Billed on duration, default 6. The final charge comes from usage.

Limits

Runs: In the background
Returns: video
Longest queue wait: 3600s
Run deadline: 1800s
Largest inline input: 1024 KB
Largest input file: 500 MB
Largest output: 4768 MB
Outputs per run: 16

Input

Field	Kind	Default	Description
`prompt` required	text	—	Text description of what should happen next in the video.
`video_url` required	URL or file	—	URL of the source video to extend. Must be MP4 format (H.264, H.265, or AV1 codec), 2-15 seconds long.
`duration`	number (whole) 2 to 10	6	Length of the extension in seconds.

Same request in code

curl https://api.spiral.ai/v1/runs \
  -H "Authorization: Bearer $SPIRAL_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
    "provider": "fal",
    "model": "xai/grok-imagine-video/extend-video",
    "input": {
      "prompt": "The camera slowly zooms out to reveal the city skyline at sunset",
      "video_url": "https://v3b.fal.media/files/b/0a8b9112/V5Z_NIPE3ppMDWivNo6_q_video_019.mp4"
    }
  }'