falVideo to videoComing soon

fal-ai/ltx-2.3/extend-video

Name: fal-ai/ltx-2.3/extend-video
Brand: fal

fal-ai/ltx-2.3/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

$0.13 per second. Billed on duration, default 5. 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
`video_url` required	URL or file	—	The URL of the video to extend
`prompt`	text	—	Description of what should happen in the extended portion of the video.
`duration`	number 2 to 20	5	Duration in seconds to extend the video. Minimum 2 seconds, maximum 20 seconds.
`mode`	one of start, end	end	Where to extend the video: 'end' extends at the end, 'start' extends at the beginning.
`context`	number 1 to 20	—	Number of seconds from the input video to use as context for the extension (minimum 1 second, maximum 20 seconds). If not provided, defaults to maximize available context within the 505 frame limit.

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": "fal-ai/ltx-2.3/extend-video",
    "input": {
      "video_url": "https://v3b.fal.media/files/b/0a90e01f/SWYdQyTBCPWYOLgfg5Jw2_004_video.mp4"
    }
  }'