Video Generation Overview

UniAll video models share one default asynchronous task lifecycle. Use each model page for model IDs, input fields, and capability limits; use this page for task polling, status handling, errors, and result retrieval.

Models

• Happy Horse
• Seedance 2.0
• Seedance 2.5, including Draft to final video
• Grok Video 1.5
• Grok Imagine
• Veo 3.1
• Gemini Omni Flash Preview
• Vidu Q3
• Hailuo
• MiniMax H3 / H3 Max native API
• Kling
• Wan 2.6
• Sora 2

Default Endpoints

{BASE_URL} is https://api.uniall.ai.

Action	Method	Endpoint
Create a task	POST	/v1/videos
Query status and result	GET	/v1/videos/{task_id}
Download completed content	GET	/v1/videos/{task_id}/content

Send Authorization: Bearer sk-*** on every request. A model page may document a compatible creation path or a protocol-specific exception; its model IDs and request body still come from that model page.

Video Task Lifecycle

1. Save The Task ID

A successful create request returns a public id. Some responses also include the same value as task_id for compatibility. Store either value before leaving the request flow.

{
  "id": "task_xxxxxxxxxxxxx",
  "task_id": "task_xxxxxxxxxxxxx",
  "object": "video.generation.job",
  "model": "model-name",
  "status": "queued",
  "progress": 0,
  "created_at": 1785801600
}

2. Poll The Task

Query the task every 3 to 10 seconds:

curl "{BASE_URL}/v1/videos/task_xxxxxxxxxxxxx" \
  -H "Authorization: Bearer sk-***"

Stop only when status becomes completed or failed. Do not create a duplicate task only because the current task remains queued or in_progress.

Status	Terminal	Meaning
queued	No	The task was accepted and is waiting for processing.
in_progress	No	Generation or result processing is still running.
completed	Yes	The final result is ready.
failed	Yes	The task ended without a result; inspect error.

3. Read The Result

A completed task returns the public result in video_url, result.video_url, or result.outputs[0]. These fields can point to the same video.

{
  "id": "task_xxxxxxxxxxxxx",
  "task_id": "task_xxxxxxxxxxxxx",
  "object": "video.generation.job",
  "model": "model-name",
  "status": "completed",
  "progress": 100,
  "video_url": "https://example.com/generated-video.mp4",
  "result": {
    "video_url": "https://example.com/generated-video.mp4",
    "outputs": [
      "https://example.com/generated-video.mp4"
    ]
  },
  "error": null
}

Prefer the returned video_url to download the completed video. The authenticated content endpoint is also available:

curl -L "{BASE_URL}/v1/videos/task_xxxxxxxxxxxxx/content" \
  -H "Authorization: Bearer sk-***" \
  -o output.mp4

Do not call the content endpoint before completion. Download generated media promptly instead of treating a result URL as permanent storage.

4. Handle Failure

{
  "id": "task_xxxxxxxxxxxxx",
  "object": "video.generation.job",
  "model": "model-name",
  "status": "failed",
  "progress": 100,
  "result": null,
  "error": {
    "code": "task_failed",
    "message": "Video generation failed"
  }
}

Fix invalid inputs before creating a new task. Retry transient service errors with backoff, but do not repeatedly resubmit the same request while the original task is still active.

For Seedance 2.5, do not automatically retry creation after failure, a client timeout, or an uncertain outcome. Continue querying the existing task ID, or establish the original request's outcome before submitting again. This includes Draft finalization; see the model-specific workflow.

Shared Response Fields

Field	Type	Description
id	string	Public task ID used for polling.
task_id	string	Compatible alias of id when present.
object	string	Task object type, commonly video.generation.job.
model	string	Public model ID used for creation.
status	string	queued, in_progress, completed, or failed.
progress	integer	Progress from 0 to 100 when available; it does not replace status.
video_url	string or null	Public result URL after completion.
result	object or null	Completed output details, including video_url or outputs.
error	object or null	Public code and message for a failed task.
created_at	integer	Unix creation timestamp when available.
completed_at	integer	Unix completion timestamp when available.

Model-Specific Exceptions

MiniMax H3 task details use a task object and the statuses queued, running, succeeded, failed, and cancelled. Use the H3 native API guide for request and response examples.

Gemini Omni Flash Preview creates requests through POST /v1beta/interactions. When a follow-up query is needed, use the returned interaction_id with GET /v1/videos/generations/{interaction_id}. Its terminal statuses, error handling, and result fields follow the same rules above.

Protocol-specific pages such as Sora 2 Native OpenAI Format may stream their own response instead of returning a standard video task. Follow the response flow documented on that page.