LTX video to video prompting guide
Last checked 2026-10-11LTX-2 / LTX-2.5 (Lightricks) · LTX-2 Pro (fal t2v), LTX-2.5 open weights
How to prompt LTX in video-to-video mode. Every point links its source; community tips are marked. Your agent gets the same guide through the Atlas MCP (get_guide).
Prompt structure
section window→what happens in section→audio mode
- Establish the shot (cinematography, scale); set the scene (light, palette, texture, atmosphere); action as a flowing sequence with active verbs; characters with emotion shown physically; camera movement and how subjects look after it; audio. source ↗
What the text should describe
- Retake: video_uri + start_time + duration (≥2 s) + prompt describing what happens in that section only; mode replace_audio|replace_video|replace_audio_and_video. Input ≥73 frames, ≤4K. source ↗
- Extend: duration 2–20 s, mode end|start, prompt for the new part; context seconds + duration ≤505 frames. source ↗
What not to describe
- Retake/extend run on LTX-2.3 (ltx-2-3-pro default); LTX-2.5 doesn't list them. source ↗
Responds well to
- Best: cinematic single-subject scenes, clear camera language, consistent lighting, described audio; dialogue in quotes with language/accent. source ↗
Duration and limits
- API: generate_audio default true; fps default 24; retake section ≥2 s on inputs ≥73 frames; extend 2–20 s (context+duration ≤505 frames); audio-to-video length follows the audio. source ↗
Multi-shot
- Several shots joined by explicit cuts; re-establish framing, identity and audio at each cut. source ↗
- At every cut say whether music/dialogue/ambience continues or changes, and re-identify subjects. source ↗
Avoid and failure modes
- On-screen text spelling not guaranteed; chaotic physics causes artifacts. source ↗
- Don't paste a Kling/Seedance prompt into LTX unchanged: tag syntax and shot-list formatting don't carry over. Aim for ~4–8 descriptive sentences, present tense. source ↗
Negative prompt
Supported via .
Next
All LTX modesLTX model, prices & shotsFrom $0.06/s · pricesSeedance video to videoKling video to videoRunway video to videoLuma video to video