lightricks/ltx-2.3-fast/image-to-video
Ltx 2.3 Fast is Lightricks's image-to-video AI model. Bring static images to life with fluid animation, consistent character motion, and professional-grade video output.
PNG, JPEG, WebP, or GIF · 20 MiB maximum
PNG, JPEG, WebP, or GIF · 20 MiB maximum
Example output — click Run to generate your own
Send your first request
OpenAI-compatible endpoint with unified authentication and usage tracking.
https://api.sandbase.ai/v1/runlightricks/ltx-2.3-fast/image-to-videoInput Schema
7 parameters · 2 required · 5 optional
| Parameter | Type | Required | Description |
|---|---|---|---|
image | string | Required | URL of the image to generate the video from. Must be publicly accessible or base64 data URI. Supports PNG, JPEG, WebP, AVIF, and HEIF formats. |
prompt | string | Required | The prompt to generate the video from · Min length: 1 · Max length: 5000 |
duration | integer | Optional | The duration of the generated video in seconds. The fast model supports 6-20 seconds. Note: Durations longer than 10 seconds (12, 14, 16, 18, 20) are only supported with 25 FPS and 1080p resolution. · Options: 6, 8, 10, 12, 14, 16, 18, 20 · Default: 6 68101214161820 |
end_image | string | Optional | The URL of the end image to use for the generated video. When provided, generates a transition video between start and end frames. |
resolution | string | Optional | The resolution of the generated video · Options: 1080p, 1440p, 2160p · Default: "1080p" 1080p1440p2160p |
aspect_ratio | string | Optional | The aspect ratio of the generated image. · Options: 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16 21:916:93:24:35:41:14:53:42:39:16 |
generate_audio | boolean | Optional | Whether to generate audio for the generated video · Default: true |
Output Schema
| Field | Type | Description |
|---|---|---|
id | string | Unique identifier for the generation task |
status | string | Task status: pending, running, completed, failed, timeout |
model | string | Model used for the generation |
outputs | array | Array of output items |
outputs[].url | string | URL of the generated artifact |
outputs[].content_type | string | MIME type (e.g. image/png, video/mp4) |
error | object | null | Error details if failed, null on success |
error.type | string | Machine-readable error type code |
error.message | string | Human-readable error description |
Async Workflow
This model uses asynchronous execution. Submit a request and poll for the result.
- Submit — POST to /v1/run, receive an
id - Poll — GET /v1/run/{id} until status is
completed,failed, ortimeout - Retrieve — Read
outputsfrom the completed response
Code Examples
Ready-to-run snippets
# Step 1: Submit
curl -X POST https://api.sandbase.ai/v1/run \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
"model": "lightricks/ltx-2.3-fast/image-to-video",
"image": "https://static.sandbase.ai/examples/lightricks/ltx-2.3-fast/image-to-video/input_image_0.png",
"prompt": "Snorkel lens ground-scraping tracking shot following a barefoot Ethiopian long-distance runner training on a dirt road at dawn, camera inches from the ground racing alongside, her feet kicking up red dust in slow motion at 240fps, Rift Valley landscape blurred in the background, the texture of earth and callused skin in hyper-detail, 40mm snorkel lens at ground height, Nike Running documentary meets Lubezki natural light, the poetry of human endurance",
"duration": 6,
"resolution": "1080p",
"generate_audio": true
}'
# Step 2: Poll result (replace <id>)
curl https://api.sandbase.ai/v1/run/<id> \
-H "Authorization: Bearer YOUR_API_KEY"API README
LTX 2.3 Fast Image to Video
LTX 2.3 Fast Image to Video is a image-to-video animation endpoint in the LTX 2.3 family. It is built for creators who need to turn a concrete creative brief into a controlled visual sequence: the request establishes the source material, the intended subject behavior, the camera language, and the atmosphere of the finished shot. The fast route keeps that workflow explicit instead of hiding its input assumptions behind a generic video-generation label.
In practice, this route accepts image, end image as creative context and exposes duration, resolution, aspect ratio, generate audio for delivery planning. That makes it suitable for shot-based pipelines where teams must preserve a source, direct a transformation, or control the final format without losing sight of the model's central task. Write prompts as a compact shot plan—subject, action, setting, camera, light, and timing—then use the structured fields for constraints that should remain deterministic across iterations.
Highlights
- First-frame animation. Turns a supplied still into moving footage while the prompt specifies subject action, camera behavior, and atmosphere.
- Synchronized audio path. Audio conditioning or generation is available in the same request, helping sound and picture share one creative plan.
- Endpoint composition. An optional end frame can anchor where the shot lands, giving transitions a deliberate visual destination.
- Resolution-aware delivery. Explicit output resolution lets the request target preview or finishing needs before generation.
Pricing
The request price is calculated with params.resolution == "2160p" ? params.duration * 0.24 : params.resolution == "1440p" ? params.duration * 0.12 : params.duration * 0.06.
| Configuration | Price |
|---|---|
| duration=6, resolution=1080p | $0.360000 |
| duration=6, resolution=1440p | $0.720000 |
| duration=6, resolution=2160p | $1.440000 |
| duration=8, resolution=1080p | $0.480000 |
| duration=8, resolution=1440p | $0.960000 |
| duration=8, resolution=2160p | $1.920000 |
| duration=10, resolution=1080p | $0.600000 |
| duration=10, resolution=1440p | $1.200000 |
| duration=10, resolution=2160p | $2.400000 |
| duration=12, resolution=1080p | $0.720000 |
| duration=14, resolution=1080p | $0.840000 |
| duration=16, resolution=1080p | $0.960000 |
| duration=18, resolution=1080p | $1.080000 |
| duration=20, resolution=1080p | $1.200000 |
The model card records a base price of $0.060000; the formula above determines usage-priced requests.
When to Use
| Scenario | Recommendation |
|---|---|
| Choose this route | Use it when the deliverable specifically calls for image-to-video animation, rather than a neighboring generation mode. |
| Prepare the source | Provide image in the format described by the request schema. |
| Direct the shot | Describe the subject, action, environment, camera movement, lighting, and temporal progression in that order. |
| Control continuity | Use endpoint frames, reference media, strength, or audio controls when those fields are available instead of burying hard constraints in prose. |
| Plan delivery | Set duration, frame count, resolution, and aspect ratio explicitly when the schema exposes them, then compare iterations with a stable seed where supported. |
Prompt Guide
For image-to-video animation, describe one coherent shot rather than a list of visual keywords. Put the main subject and action first, follow with location and staging, then add camera movement, lens or framing, lighting, mood, and any timed change. Keep URLs and hard delivery choices in their dedicated fields.
{
"prompt": "Snorkel lens ground-scraping tracking shot following a barefoot Ethiopian long-distance runner training on a dirt road at dawn, camera inches from the ground racing alongside, her feet kicking up red dust in slow motion at 240fps, Rift Valley landscape blurred in the background, the texture of earth and callused skin in hyper-detail, 40mm snorkel lens at ground height, Nike Running documentary meets Lubezki natural light, the poetry of human endurance",
"image": "https://static.sandbase.ai/examples/lightricks/ltx-2.3-fast/image-to-video/input_image_0.png",
"duration": 6,
"resolution": "1080p",
"aspect_ratio": "21:9",
"generate_audio": true
}
Technical Specs
| Specification | Value |
|---|---|
| Model ID | lightricks/ltx-2.3-fast/image-to-video |
| Required inputs | prompt, image |
| Execution | Asynchronous generation job |
| Request controls | 7 documented fields |
| Output | url, content_type |
Request fields
| Field | Type and constraints |
|---|---|
image | string; Required |
prompt | string; Required |
duration | integer; Optional; Options: 6, 8, 10, 12, 14, 16, 18, 20; Default: 6 |
end_image | string; Optional |
resolution | string; Optional; Options: 1080p, 1440p, 2160p; Default: "1080p" |
aspect_ratio | string; Optional; Options: 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16 |
generate_audio | boolean; Optional; Default: true |