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ltx/ltx-2.5-pro/image-to-video
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LTX-2.5 Pro Image-to-Video
image-to-video
PRO

LTX 2.5 Pro Image-to-Video API by LTX

ltx/ltx-2.5-pro/image-to-video
Image-to-video

LTX-2.5 Pro image-to-video (Lightricks LTX-2 native API): animate a first-frame image (optionally interpolating to a last frame), up to 4K at 24/48 fps (6–10s, top-quality, with synchronized audio).

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LTX 2.5 Pro Image-to-Video is developed by a third-party provider. Atlas Cloud (operated by Atlas Cloud AI LLC) provides access to it and does not own it. All trademarks belong to their respective owners.

1. Introduction

LTX-2.5 Pro Image-to-Video is served through the native Lightricks LTX-2 API (api.ltx.io). This README covers a single API model identifier:

  • ltx/ltx-2.5-pro/image-to-video

LTX-2 is Lightricks' second-generation diffusion-transformer video model, generating video up to 4K at cinematic frame rates (24 and 48 fps). This is the LTX-2.5 Pro tier: it generates 6–10 second clips and supports synchronized audio generation. Requests are processed asynchronously (submit + poll) and every generation is delivered as a finished MP4 hosted on AtlasCloud storage.

2. Key Features

  • Image-to-Video: Animate a first-frame image; optionally set last_image to interpolate precisely from the first frame to a chosen last frame.
  • Native Audio-Video: Produces a matched soundtrack (ambience, effects, speech) aligned to the visuals; set generate_audio: false for a silent clip.
  • Up to 4K, 24/48 fps: Renders at 720p / 1080p / 1440p / 4K in landscape (16:9) or portrait (9:16).
  • Top-Quality Rendering: Prioritizes visual fidelity, motion coherence and prompt adherence, with 6–10s single-pass duration.
  • Camera Control: Optional camera_motion directive (dolly, jib, focus shift, static).

3. Support Matrix

ResolutionLandscapePortraitFPSDuration (s)
720p1280x720720x128024, 486, 8, 10
1080p1920x10801080x192024, 486, 8, 10
1440p2560x14401440x256024, 486, 8, 10
4K3840x21602160x384024, 486, 8, 10

duration: -1 (automatic) is available on LTX-2.5 tiers only. Audio generation is supported.

4. Parameters

The request body matches this model's schema exactly:

ParameterTypeRequiredDefaultNotes
imagestringYesFirst-frame image: URL, Base64, or asset reference (asset://<ASSET_ID>). The video starts from this image.
last_imagestringNoOptional last-frame image (URL / Base64 / asset://). When set, the clip interpolates from the first frame to this frame.
promptstringNoThe scene comes alive with gentle, natural motion and cinematic lighting.Text prompt describing the desired motion, camera movement and atmosphere. Optional but recommended.
durationintegerNo-1One of: -1, 6, 8, 10. Video length in seconds. Use -1 to let the model choose the duration automatically.
resolutionstringNo720pOne of: 720p, 1080p, 1440p, 4k. Output resolution tier. Combined with aspect_ratio to select the exact frame size (720p→1280x720, 1080p→1920x1080, 1440p→2560x1440, 4k→3840x2160; portrait 9:16 swaps width/height). 1440p and 4k support 6–10s durations only.
aspect_ratiostringNo16:9One of: 16:9, 9:16. Frame orientation: 16:9 landscape or 9:16 portrait.
fpsintegerNo24One of: 24, 48. Frames per second. 48 fps is available only for durations ≤10s; at 1440p and 4k all durations are ≤10s regardless of fps.
generate_audiobooleanNotrueWhether to generate AI audio (ambience, effects, speech) matching the scene.
camera_motionstringNoOne of: dolly_in, dolly_out, dolly_left, dolly_right, jib_up, jib_down, static, focus_shift. Optional camera movement directive applied to the shot.

5. Intended Use & Applications

  • Product & Brand Video: Animate a product still into a polished, on-brand showcase.
  • Photo Animation: Bring a single image to life with natural, controllable motion.
  • First/Last-Frame Control: Pin a start and end frame (image + last_image) for precise transitions.
  • Social & Vertical Content: Native 9:16 portrait output for short-form platforms.

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