falVideo to videoComing soon

fal-ai/ltx-2.3-quality/inpaint

Name: fal-ai/ltx-2.3-quality/inpaint
Brand: fal

fal-ai/ltx-2.3-quality/inpaint 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.

Price pending

Pricing

Price pending.

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	—	The prompt describing what to generate inside the masked area.
`video_url` required	URL or file	—	The source video to inpaint.
`mask_video_url` required	URL or file	—	The mask video. White regions are regenerated; black regions are preserved from the source video.
`video_strength`	number 0 to 1	1	Strength of the IC-LoRA video guide for the preserved content. Higher values keep the source video structure more strongly.
`num_frames`	number (whole) 9 to 481	121	The number of frames to generate.
`frames_per_second`	number 1 to 60	24	Frames per second of the generated video.
`num_inference_steps`	number (whole) 8 to 30	15	Number of inference steps. Defaults to 15 and can be increased up to 30.
`guidance_scale`	number 1 to 20	1	Classifier-free guidance scale. The default is tuned for fast, high-quality generation.
`generate_audio`	true or false	true	Whether to include audio in the returned video. When disabled, the final MP4 is returned without an audio track.
`negative_prompt`	text	color distortion, overexposure, static, blurry details, subtitles, style, artwork, painting, frame, still, dim overall tone, worst quality, low quality, JPEG compression artifacts, ugly, mutilated, extra fingers, poorly drawn hands, poorly drawn face, deformed, disfigured, malformed limbs, fused fingers, motionless frame, cluttered background, three legs, crowded background, walking backwards	The negative prompt to steer generation away from.
`seed`	number (whole)	—	Random seed for reproducibility. If None, a random seed is chosen.
`enable_prompt_expansion`	true or false	true	Whether to enable prompt expansion.
`video_quality`	one of low, medium, high, maximum	high	The quality preset of the generated video.
`video_write_mode`	one of fast, balanced, small	balanced	The write mode of the generated video.

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-quality/inpaint",
    "input": {
      "prompt": "Replace the masked region with matching cinematic background detail.",
      "video_url": "<video_url>",
      "mask_video_url": "<mask_video_url>"
    }
  }'