LTX 2.3 Outpaint

LTX · Video · Video → Video

Expand a video past its original frame — the source stays put inside a wider canvas and the surrounding region is generated to match.

Model ID: ltx-v2.3-outpaintWorkflow: ltx-2.3-quality/outpaint

Video InputOutpaintAudioUp to 1080p

Try on Playground ↗

SDK API Advanced Usage Pricing

Authentication

Send your Picsart API key as a bearer token on every request.

Header

Authorization: Bearer <PICSART_API_KEY>

Make a request

One endpoint serves every model: POST to /workflows/v1/models/execute with the model id and its input in the body. The nesting is deliberate — the outer paramsis the envelope every workflow takes, and the inner one is this model's own input. Those inner names are the same unified ones the SDK takes, so a call translates one-to-one between the two — no per-vendor naming to learn.

cURL

curl -X POST 'https://api.green-salad-4efd.toolsminati.workers.dev/workflows/v1/models/execute' \
  -H 'Authorization: Bearer $PICSART_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
  "params": {
    "model": "ltx-v2.3-outpaint",
    "params": {
      "prompt": "A serene mountain lake at golden hour, ultra detailed",
      "videoUrl": "https://cdn.example.com/input.mp4",
      "aspectRatio": "21:9",
      "resolution": "720p"
    }
  }
}'

Async (submit & poll)

This model can run longer than the sync limit (~20s), so send it to /workflows/v1/models/submit, which returns a task id, and poll /workflows/v1/models/{taskId}/result until response.status is COMPLETED or FAILED.

cURL

# 1. Submit the job
curl -X POST 'https://api.green-salad-4efd.toolsminati.workers.dev/workflows/v1/models/submit' \
  -H 'Authorization: Bearer $PICSART_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
  "params": {
    "model": "ltx-v2.3-outpaint",
    "params": {
      "prompt": "A serene mountain lake at golden hour, ultra detailed",
      "videoUrl": "https://cdn.example.com/input.mp4",
      "aspectRatio": "21:9",
      "resolution": "720p"
    }
  }
}'
# → { "status": "success", "response": { "id": "task_abc123" } }

# 2. Poll until response.status is COMPLETED
curl 'https://api.green-salad-4efd.toolsminati.workers.dev/workflows/v1/models/task_abc123/result' \
  -H 'Authorization: Bearer $PICSART_API_KEY'

Result body

{
  "status": "success",
  "response": {
    "id": "task_abc123",
    "status": "COMPLETED",
    "result": {
      "url": "https://cdn.green-salad-4efd.toolsminati.workers.dev/…/result",
      "items": [
        {
          "url": "https://cdn.green-salad-4efd.toolsminati.workers.dev/…/result"
        }
      ],
      "model": "ltx-v2.3-outpaint"
    },
    "usage": {
      "credits": 1
    }
  }
}

Parameters

17 parameters, sent inside the inner paramsobject. Identical to the SDK's — one parameter set, whichever transport you use.

Parameter	Type	Required	Default	Details
`prompt` Prompt	`text`	yes	`—`	max 5000 chars
`videoUrl` Source Video	`file (video)`	yes	`—`	—
`negativePrompt` Negative Prompt	`text`	no	`—`	—
`aspectRatio`	`enum`	no	`21:9`	21:9, 16:9, 4:3, 1:1, 3:4, 9:16, 9:21
`resolution`	`enum`	no	`720p`	480p, 720p, 1080p
`numFrames` Frames	`range`	no	`121`	9–481
`fps` FPS	`range`	no	`24`	1–60
`sourceScale` Source Scale	`range`	no	`1`	0.25–1 (step 0.05)
`videoStrength` Source Strength	`range`	no	`1`	0–1 (step 0.05)
`cfgScale` CFG Scale	`range`	no	`1`	1–20
`numInferenceSteps` Inference Steps	`range`	no	`15`	8–30
`videoQuality` Video Quality	`enum`	no	`high`	low, medium, high, maximum
`videoWriteMode` Write Mode	`enum`	no	`balanced`	fast, balanced, small
`enhancePrompt`	`boolean`	no	`true`	—
`generateAudio`	`boolean`	no	`true`	—
`enableSafetyChecker` Safety Checker	`boolean`	no	`true`	—
`seed` Seed	`range`	no	`—`	0–2147483647 (step 1)

Response

The body arrives in the gateway's status envelope, so the output is at response.result — alongside the task id, its status and the credits charged. Asset models return url plus an items array; text models return text instead.

Response body

{
  "status": "success",
  "response": {
    "id": "task_abc123",
    "status": "COMPLETED",
    "result": {
      "url": "https://cdn.green-salad-4efd.toolsminati.workers.dev/…/result",
      "items": [
        {
          "url": "https://cdn.green-salad-4efd.toolsminati.workers.dev/…/result"
        }
      ],
      "model": "ltx-v2.3-outpaint"
    },
    "usage": {
      "credits": 1
    }
  }
}