LTX 2 Fast API for Image to Video

LTX‑2 Fast Image‑to‑Video takes a single still frame plus a brief “motion prompt” and quickly turns it into a 6–20 second video with expressive movement and optional audio, optimized for speed over absolute detail.​

What LTX‑2 Fast I2V does

• Animates one input image (photo, render, key art) into a smooth video clip using a distilled LTX‑Video pipeline focused on low latency.​

• Preserves the overall look—subject, colors, composition—while adding camera motion, environmental motion, or light subject motion based on your prompt.​

Key settings and limits

• Inputs:

  • image_url (required): your static frame to animate.​

  • prompt (required): natural‑language description of how the image should move.​

• Duration: 6–20 seconds; longer durations are usually limited to 1080p/25 fps for speed and stability.​

• Resolution & aspect:

  • Recommended: 1080p for fastest runs; 1440p or 2160p (4K) for sharper output if latency is acceptable.​

  • Aspect ratio: typically fixed at 16:9 in Fast profiles.​

• FPS & audio:

  • 25 or 50 fps; 50 fps for very smooth motion or slow‑downs.​

  • generate_audio: true/false to add synchronized ambience/music/SFX.​

How the Fast I2V pipeline behaves

• Uses your image as conditioning to lock in subject, palette, and layout, then predicts temporal changes from the motion prompt.​

• Reduces sampling steps and detail passes to deliver results “30× faster than traditional diffusion models,” trading some micro‑detail rigidity for motion fluidity and turnaround speed.​

Best use cases

• Quick previews of how a still concept (product shot, character frame, environment) will look in motion before investing in Pro/Ultra renders.​

• Social content (Reels, TikTok, shorts) where 1080p/50 fps with good motion and vibe is enough for final delivery.​

If you share what kinds of source images you plan to animate (characters, products, landscapes, UI mockups), the next step can be concrete motion‑prompt patterns tailored to LTX‑2 Fast I2V.