LTX 2.3 Video Extend API

LTX-2.3 Video Extend

LTX-2.3 Video Extend seamlessly extends existing videos by generating additional frames that naturally continue your content. Upload a video clip and specify how many seconds to add — the model generates smooth, coherent footage that matches the original motion, style, and atmosphere.

Why Choose This?

• Seamless extension Generates new frames that naturally continue the motion and style of your original video.

• Flexible duration Extend videos by 1 to 20 seconds based on your needs.

• Prompt guidance Optional prompts to describe how the video should continue.

• LTX-2.3 quality Built on the improved LTX-2.3 architecture for better temporal consistency.

• Simple pricing Straightforward per-second billing at $0.10/second.

• Prompt Enhancer Built-in tool to automatically improve your continuation descriptions.

Parameters

Parameter	Required	Description
video	Yes	Source video to extend (URL or upload)
duration	No	Extension length in seconds (1–20, default: 6)
prompt	No	Describe how the video should continue

How to Use

1. Upload your video — provide the source video you want to extend.
2. Set duration — choose how many seconds to extend (1–20 seconds).
3. Write your prompt (optional) — describe the motion, action, or scene changes.
4. Use Prompt Enhancer (optional) — click to refine your description.
5. Run — submit and download your extended video.

Pricing

Duration	Cost
1 s	$0.10
5 s	$0.50
10 s	$1.00
20 s	$2.00

Billing Rules

• Rate: $0.10 per second
• Duration range: 1–20 seconds

Best Use Cases

• Content Extension — Extend short clips into longer sequences for storytelling.
• Scene Continuation — Continue scenes beyond their original capture.
• Social Media — Transform brief moments into full-length videos.
• Film & Production — Extend establishing shots or B-roll footage.
• Loop Creation — Generate additional frames for seamless video loops.

Pro Tips

• Use detailed prompts describing how the motion, camera, and scene should continue.
• For best results, use source videos with clear motion direction that can be naturally continued.
• Start with shorter extensions to test results before generating longer clips.
• The model maintains temporal consistency with the original footage.

Notes

• Video is required; prompt is optional but recommended for better results.
• Duration range: 1–20 seconds.
• Ensure uploaded video URLs are publicly accessible.

Related Models

• LTX-2.3 Text-to-Video — Generate video from text with synchronized audio.
• LTX-2.3 Image-to-Video — Animate images with synchronized audio.