ltx/ltx-2/fast/image-to-video

Generate fast, realistic 4K videos from text or images with smooth 50-fps motion, synchronized audio, and efficient performance for cinematic storytelling and creative visualization.

Introduction to LTX 2 Fast Image-to-Video Generator

Released on October 23, 2025, LTX 2 Fast image-to-video is a groundbreaking generation tool developed by Lightricks Ltd as part of the open-source LTX-2 model family. It is built on the powerful foundation of multimodal video generation, combining text, image, and audio into a single synchronized output. Designed with creators in mind, LTX 2 Fast introduces faster rendering speeds, native 4K fidelity, and frame rates up to 50 fps—offering smooth cinematic motion and richer storytelling. With its efficient architecture requiring up to 50% less compute power than competing systems, it delivers high-quality previews and production-ready visuals faster than ever before. LTX 2 Fast image-to-video empowers you to turn ideas into dynamic short videos—up to 10 seconds long—directly from your text or image inputs. Perfect for filmmakers, marketers, designers, and developers, it helps you visualize, iterate, and polish creative concepts effortlessly while providing synchronized audio, realistic motion, and 4K clarity in every generation.

Examples of LTX 2 Fast Video Generator Creations

What makes LTX 2 Fast Video Generator stand out

LTX 2 Fast Video Generator is a high-fidelity image-to-video generator engineered for structural stability, photoreal motion, and efficient throughput. Starting from a single reference frame, it preserves composition, geometry, and material response while synthesizing believable dynamics, lighting continuity, and camera parallax. LTX 2 Fast Video Generator balances speed and detail with optional 50 fps output and up to 2160p 16:9 resolution, while honoring runtime constraints for longer clips. With synchronized audio generation and deterministic control over duration, resolution, and fps, LTX 2 Fast scales from quick concept previews to polished editorial shots. Designed for predictable results, LTX 2 Fast minimizes drift, avoids over-regeneration, and maintains subject identity across frames. Key capabilities:

Structure-preserving generation: LTX 2 Fast maintains pose, layout, depth, and textures; minimizes wobble and background creep.
Realistic motion modeling: smooth 25 or 50 fps trajectories with stable camera parallax and consistent lighting.
Resolution and timing control: up to 2160p 16:9; durations 6-20 s, with 12-20 s limited to 1080p at 25 fps for efficiency.
Audio ready: optional synchronized audio per clip for cohesive previews and reels.
Fast iteration at scale: LTX 2 Fast Video Generator delivers rapid turnaround from a single image without sacrificing coherence.
Production reliability: LTX 2 Fast Video Generator enforces deterministic parameters and avoids full-frame re-synthesis where not needed.

Prompting guide for LTX 2 Fast

Begin with a high-quality 16:9 source image via image_url (PNG, JPEG, WebP, AVIF, or HEIF) and a clear prompt describing motion, camera behavior, and what must remain unchanged. Set duration between 6 and 20 seconds; select fps and resolution based on needs. For longer clips (12-20 s), choose 25 fps at 1080p per constraints. Use generate_audio when synchronized sound is required. LTX 2 Fast respects spatial directives and preserves composition, enabling precise image-to-video translation. To balance speed and fidelity, LTX 2 Fast favors targeted motion over full-scene overhaul. When detail is paramount, LTX 2 Fast can render up to 2160p while keeping geometry stable. Examples:

City skyline photo to evening timelapse: LTX 2 Fast, gentle pan-right, maintain straight verticals, soft traffic streaks, preserve building edges, do not alter horizon.
Portrait to subtle breathing loop: stabilize face and eyes, micro head sway, background-only bokeh drift, skin tones unchanged, 6 s at 25 fps.
Product hero to turntable: 10 s, centered frame, 45-degree slow rotation, reflections consistent, matte black backdrop, no logo changes.
Landscape to approaching storm: LTX 2 Fast, cloud buildup and wind in grass, camera locked, 50 fps at 1440p, generate_audio true for ambient.
Architectural render to living scene: 2160p, shallow parallax from slight dolly-in, keep perspective vertical, signage unchanged, 8 s. Pro tips:
State preservation rules first: subjects to keep, regions to edit, and lighting to maintain so LTX 2 Fast stays conservative where needed.
Align parameters with constraints: 12-20 s requires 1080p at 25 fps; only 16:9 is supported.
Use precise spatial language: left, right, foreground, background, upper-right quadrant for targeted image-to-video control.
Provide clean, high-resolution inputs cropped to 16:9; remove watermarks and irrelevant borders before sending image_url.
Iterate in short steps; adjust duration, fps, and motion verbs, then re-run LTX 2 Fast to converge on the desired result.

Related Playgrounds

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seedance-1-0/lite/reference-to-video

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Frequently Asked Questions

What is LTX 2 Fast, and what makes its image-to-video feature unique?

LTX 2 Fast is a high-performance video generation mode within the LTX-2 model family by Lightricks. It stands out for its image-to-video capability, allowing creators to turn static images or text prompts into short cinematic video clips with synchronized audio in one pass.

How does LTX 2 Fast differ from earlier versions of the model in terms of image-to-video performance?

Compared to previous versions like LTX-Video, LTX 2 Fast delivers much faster image-to-video generation, achieving native 4K resolution and up to 50 fps output while using about 50% less compute, making it ideal for rapid ideation and preview workflows.

Who can benefit most from using LTX 2 Fast for image-to-video projects?

LTX 2 Fast is particularly useful for indie filmmakers, marketers, motion designers, and game studios who need quick, high-fidelity image-to-video renderings for storyboards, ads, or concept visualization without long rendering times or heavy GPU requirements.

How much does it cost to use LTX 2 Fast for image-to-video generation?

Access to LTX 2 Fast on platforms like Runcomfy’s AI playground requires spending usage credits, although new users receive free trial credits. The image-to-video generation cost depends on clip duration and selected mode, such as Fast, Pro, or Ultra.

What quality and resolution can I expect from LTX 2 Fast image-to-video outputs?

When using LTX 2 Fast in image-to-video mode, outputs are typically generated between QHD and native 4K resolution, with frame rates from 24 fps up to 50 fps. Audio is synchronized automatically, providing cinematic-quality short clips.

Can I use LTX 2 Fast image-to-video mode on my mobile device?

Yes, LTX 2 Fast is accessible through the Runcomfy website, which works well on modern mobile browsers. You can initiate image-to-video prompts, preview outputs, and manage credit usage directly from a smartphone or tablet.

Does LTX 2 Fast support multiple input types beyond image-to-video conversion?

Absolutely. While the image-to-video feature is a key strength, LTX 2 Fast also supports text, depth maps, reference videos, and even short audio inputs to help create synchronized motion and sound in the final video.

What are the main limitations of LTX 2 Fast for image-to-video generation?

While LTX 2 Fast excels at fast image-to-video rendering, clip lengths are limited to around 6–10 seconds in Fast mode. Longer outputs require Pro or Ultra modes, and the model is still dependent on GPU resources for optimal speed.

Where can I try LTX 2 Fast image-to-video generation online?

You can experiment with LTX 2 Fast directly in Runcomfy’s AI playground at runcomfy.com/playground after logging in. The platform provides credit-based access and supports free trials to generate sample image-to-video clips quickly.