kling-3.0/4k/image-to-video
Animate stills into native 4K cinematic clips with start-end frame guidance and synchronized sound.
Controls on this LTX 2.5 Pro Image-to-Video page:
| Parameter | Required | Type | Default | Range / Options | Description |
|---|---|---|---|---|---|
image_url* | Yes (*) | Image URL | Example still | JPG, JPEG, PNG, WEBP, GIF, AVIF | Start frame that LTX 2.5 Pro will animate. |
end_image_url | No | Image URL | — | Same formats | Optional finish frame for a guided start→end transition. |
prompt* | Yes (*) | String | Example prompt | Up to 5,000 characters | Motion, camera, lighting, style, and audio cues. |
duration | No | String | 10 | auto, 6, 8, 10 | Fixed seconds or auto for model-chosen length. |
resolution | No | String | 1080p | 720p, 1080p | Pro delivery resolutions for final-looking clips. |
aspect_ratio | No | String | auto | auto, 16:9, 9:16 | Prefer auto to follow the still. |
fps | No | Integer | 25 | 24, 25, 50 | Match editorial cadence or smoother motion. |
generate_audio | No | Boolean | true | true / false | On for synced ambience or dialogue; off for silent plates. |
camera_motion | No | String | — | dolly_in, dolly_out, dolly_left, dolly_right, jib_up, jib_down, static, focus_shift | Optional prescribed camera path. |
LTX 2.5 Pro Image-to-Video is billed per second of generated video. Native audio is included.
| Resolution | Price per second | 6s | 8s | 10s |
|---|---|---|---|---|
| 720p | $0.132 | $0.792 | $1.056 | $1.32 |
| 1080p | $0.19 | $1.14 | $1.52 | $1.90 |
For batches, total ≈ duration × per-second rate × output count. When duration is auto, billing follows the actual generated length.
Animate stills into native 4K cinematic clips with start-end frame guidance and synchronized sound.
Create lifelike scenes with synced audio and visual fidelity.
AI-powered tool for fast video-to-video backdrop swaps with pro-level precision.
Generate cinematic 3-15s videos from text with optional sound.
Transform visuals into smooth 4K motion clips with sync audio and rapid rendering.
FLUX 3 Draft Keyframes: Fast multi-keyframe video previews at 720p
LTX 2.5 Pro animates a still into a short video with optional synchronized audio in a quality-focused mode. It is aimed at delivery-ready still-to-motion rather than the fastest draft passes.
LTX 2.5 Pro prioritizes higher-fidelity final output at 720p or 1080p with durations up to 10 seconds. Use the Fast page when you need cheaper, longer, or 4K draft iterations first.
LTX 2.5 Pro supports 720p and 1080p, with duration set to auto or fixed lengths of 6, 8, or 10 seconds. FPS options are 24, 25, and 50, and aspect ratio can follow the still (auto) or use 16:9 or 9:16.
Yes. Provide a start image (required) and optionally an end image when you want a guided transition between two compositions. Leave the end image empty for open-ended motion from the first frame only.
Native audio can be generated with the picture when generate_audio is enabled, and audio is included in the per-second rate. Turn audio off if you need a silent plate for later sound design.
Prompts can be up to 5,000 characters. Start and optional end images accept common formats such as JPG, PNG, WEBP, GIF, and AVIF. Check the current RunComfy parameter panel for any additional upload size limits.
Yes. Prototype in the RunComfy Web UI, then call the same LTX 2.5 Pro Image-to-Video model via the HTTP API with matching parameters for automation and production workflows.
Billing is per second of generated video: $0.132 at 720p and $0.19 at 1080p. When duration is auto, the charge follows the actual generated length. Generations consume USD/credits on RunComfy; new users typically receive a free trial amount.
RunComfy is the premier ComfyUI platform, offering ComfyUI online environment and services, along with ComfyUI workflows featuring stunning visuals. RunComfy also provides AI Models, enabling artists to harness the latest AI tools to create incredible art.
