Introducing LTX-2 19B API on Pixazo for Cinematic Image-to-Video and Audio-Synchronized Generation

We’re excited to introduce the LTX-2 19B API on Pixazo — a powerful, open-source, next-generation image-to-video AI model developed by Lightricks, now available through Pixazo’s unified API platform. LTX-2 19B is designed for creators, developers, and production teams who require cinematic-quality video generation with tightly synchronized audio, high resolution, and professional motion control — all generated in a single, unified workflow.

Built on a Diffusion Transformer architecture, LTX-2 19B enables the creation of visually rich video sequences while simultaneously generating scene-aware audio such as ambient sound, environmental effects, and speech synchronization where applicable. Unlike traditional pipelines that separate video generation, sound design, and editing into multiple stages, LTX-2 19B treats audiovisual creation as a single, coherent process.

With support for extended clip durations, native 4K output, frame-rate control, and advanced camera motion LoRA modules, LTX-2 19B is well-suited for film-style storytelling, advertising creatives, immersive media, and advanced content pipelines that demand realism, temporal stability, and audiovisual coherence at scale.

What is LTX-2 19B API?

The LTX-2 19B API provides programmatic access to Lightricks’ open-source multimodal AI foundation model for video generation. It enables developers and platforms to generate high-quality videos — with synchronized audio — from text prompts, images, or reference videos using a single API.

LTX-2 19B is built around a unified multimodal architecture that understands how visuals and sound should evolve together over time. Rather than generating silent video and layering audio afterward, the model coordinates motion, timing, and sound at the generation level, ensuring that audio cues follow visual action naturally.

Through Pixazo, LTX-2 19B can be integrated directly into creative tools, content platforms, and automated production systems without requiring teams to manage model hosting, infrastructure, or complex inference pipelines.

The Architecture Behind LTX-2 19B

At the core of LTX-2 19B is an asymmetric dual-stream transformer architecture designed specifically for multimodal generation. The model consists of:

• A 14B-parameter video stream responsible for spatial detail, motion consistency, and temporal coherence
• A 5B-parameter audio stream dedicated to sound generation, dialogue timing, and ambient audio design

These two streams are connected through bidirectional audio-video cross-attention layers, allowing the model to continuously align sound with visual movement. This ensures that background ambience, foley effects, and speech timing remain synchronized with on-screen action across the entire clip.

Despite its scale, LTX-2 19B is optimized for practical execution. Users have reported successful local runs on consumer GPUs such as the RTX 3070 with 8GB VRAM, highlighting the model’s efficiency relative to its size.

Unified Video and Audio Generation

One of the defining strengths of LTX-2 19B is its ability to generate video and audio together in a single inference pass. This joint generation capability allows the model to reason about motion, timing, and sound as interconnected elements of storytelling.

LTX-2 19B can produce:

• Scene-aware ambient audio
• Foley elements that follow character movement
• Background soundscapes that evolve with the environment
• Speech synchronization when dialogue is present

Because the model understands audiovisual context holistically, the resulting output feels cohesive and intentional rather than assembled from disconnected components.

Suggested Read: Introducing LTX-2 Video API on Pixazo for Unified Audio-Visual AI Video Generation

Flexible Input Modes for Creative Control

LTX-2 19B supports multiple input workflows, giving creators flexibility in how they start their generation process. Supported modes include:

• Text-to-Video for generating complete scenes from descriptive prompts
• Image-to-Video for animating still images with coherent motion and depth
• Video-to-Video for extending, refining, or restyling existing clips

This flexibility makes LTX-2 19B suitable for everything from early-stage concept development to advanced production workflows where continuity and control are essential.

Advanced Camera Motion Control with LoRA Modules

LTX-2 19B offers specialized LoRA (Low-Rank Adaptation) modules that enable precise camera movement control — a feature rarely available in open-source video models.

Supported camera motions include:

• Dolly In and Dolly Out
• Dolly Left and Dolly Right
• Jib Up and Jib Down
• Static camera for locked-off shots

These controls allow creators to define cinematic camera language directly within the generation process, making it possible to achieve professional-grade motion without traditional keyframing or manual animation.

Extended Duration and Temporal Stability

LTX-2 19B supports continuous video clips up to 20 seconds long, nearly doubling the duration limit of many competing image-to-video models. This extended duration enables more complete narrative beats, smoother transitions, and richer storytelling within a single clip.

The model maintains strong temporal stability across frames, avoiding common AI video issues such as jitter, flickering, or sudden motion inconsistencies. This makes LTX-2 19B particularly suitable for longer sequences that require visual continuity.

Native High-Resolution and Frame-Rate Support

LTX-2 19B renders video at multiple native resolutions without requiring external upscaling. Supported resolutions include:

• 720p
• 1080p
• 1440p
• Full 4K (UHD)

In addition, the model supports 25 fps and 50 fps frame rates, allowing creators to choose between cinematic film textures or smooth, high-motion sequences depending on the use case.

This combination of resolution and frame-rate control gives teams the flexibility to produce content optimized for cinema, social platforms, immersive experiences, or high-end displays.

Modality-Aware CFG for Precise Alignment

To further improve audiovisual coherence, LTX-2 19B uses a modality-aware Classifier-Free Guidance (CFG) mechanism. This specialized guidance system enhances alignment between the video and audio streams, ensuring that changes in motion, pacing, and intensity are reflected accurately in the sound design.

The result is tighter synchronization between what the viewer sees and what they hear — an essential requirement for immersive and professional-grade video output.

Suggested Read: Introducing Pixazo Free Image generation APIs (Open Beta): Build With Flux Schnell, Stable Diffusion & Inpainting — Free

Production Flows for Different Creative Needs

The LTX-2 ecosystem is organized into three production flows, allowing teams to balance speed and quality depending on their workflow stage:

• LTX-2 Fast

  Optimized for rapid iteration, previews, and storyboarding. Produces clips up to 20 seconds at slightly lower fidelity for faster turnaround.

• LTX-2 Pro

  The standard workhorse for marketing, social content, and general production. Balances high visual quality with efficient render times.

• LTX-2 Ultra

  Designed for cinematic VFX, premium branded content, and high-end production. Focuses on maximum texture detail, motion stability, and realism.

This tiered approach makes LTX-2 19B adaptable to a wide range of production environments.

Suggested Read: AI Image to Video Generation Model Comparison

What You Can Build With LTX-2 19B API?

LTX-2 19B unlocks a wide range of professional video workflows, including:

• Cinematic storytelling and short films
• Advertising visuals and branded campaigns
• Immersive media and experiential content
• Music videos and audiovisual experiments
• High-end social media and marketing assets
• Creative prototyping and concept visualization

By generating both video and audio in a single pipeline, teams can move from idea to finished clip faster while maintaining high production standards.

Suggested Read: Top AI Video Generation Model Comparison

LTX-2 19B for Developers and Platforms

For developers and platform builders, the LTX-2 19B API provides a powerful foundation for next-generation video tools. Its open-source nature allows for transparency and extensibility, while Pixazo’s hosted API removes the operational burden of deployment and scaling.

Developers can integrate cinematic video generation directly into applications, creative suites, or automated pipelines without managing complex multimodal inference systems.

Suggested Read: Best Open Source AI Video Generation Models

Why LTX-2 19B Matters for the Future of AI Video?

As AI video generation matures, the focus is shifting from novelty to control, consistency, and audiovisual coherence. LTX-2 19B represents this shift by combining advanced motion modeling, synchronized audio generation, and professional camera control into a single open-source model.

By making these capabilities accessible through an API, Pixazo enables creators and developers to build richer, more immersive video experiences without traditional production constraints.

Suggested Read: The Ultimate Pixazo Comparison: Veo 3.1 vs Sora 2 Pro vs Kling 2.6 vs Wan 2.5 vs Hailuo 2.3 vs LTX-2 Pro vs Seedance Pro

Accessing LTX-2 19B API on Pixazo

The LTX-2 19B API is now available on Pixazo through the Image-to-Video models section. Teams can integrate it using Pixazo’s standardized API interface, enabling seamless adoption across creative and production workflows.

You can explore the full documentation here: https://www.pixazo.ai/models/image-to-video/ltx-2-19b-api

Frequently Asked Questions About LTX-2 19B API

1. What is LTX-2 19B API?

LTX-2 19B API is a next-generation open-source image-to-video AI model developed by Lightricks, delivered through Pixazo’s unified API. It generates high-quality video with synchronized audio in a single generative workflow.

2. How does LTX-2 19B produce synchronized audio?

The model uses bidirectional audio-video cross-attention layers that align audio tracks — including speech and ambient sound — with visual motion, ensuring audiovisual coherence throughout the video.

3. What modalities does LTX-2 19B support?

LTX-2 19B supports Text-to-Video, Image-to-Video, and Video-to-Video workflows, offering flexible input options for diverse creative needs.

4. What resolution and frame rates are supported?

The model supports native 720p, 1080p, 1440p, and full 4K (UHD) output, along with 25 fps and 50 fps frame rates, allowing for cinematic texture or smooth motion depending on project needs.

5. Can I control camera motion in generated video?

Yes. The API includes specialized LoRA modules for advanced camera control, such as dolly moves (in/out, left/right), jib moves (up/down), and static–camera generation.