Sync.so React 1 Serverless API

Edit video actors' emotions with realistic re-expression.

~329.74s
POST /v2/sync.so-react-1 · submit + poll
 1# pip install "segmind>=1.1.0"
 2# export SEGMIND_API_KEY="YOUR_API_KEY"
 3from segmind import SegmindClient, InferenceFailed, InferenceTimeout
 4
 5# Async (v2) — recommended for long-running / video models.
 6# run() blocks up to 600s; submit_async + job.wait(timeout=...) sets a longer
 7# deadline and keeps the request_id so you can re-poll later.
 8client = SegmindClient()                      # reads SEGMIND_API_KEY
 9payload = {
10    "video_url": "https://segmind-resources.s3.amazonaws.com/output/d4aba4f5-40fe-44fa-98bf-75d1b22e766d-react-input.mp4",
11    "audio_url": "https://segmind-resources.s3.amazonaws.com/output/487a2a38-3d3b-4e9b-8b84-eebbbd242c73-react-audio.mp3",
12    "sync_mode": "bounce",
13    "model_mode": "face",
14    "prompt": "happy",
15    "temperature": 0.5,
16    "auto_active_speaker_detection": False,
17    "occlusion_detection_enabled": False,
18}
19job = client.submit_async("sync.so-react-1", **payload)
20print(job.request_id)                         # available immediately
21try:
22    result = job.wait(timeout=900, interval=2.0)
23    print(result["status"])                  # COMPLETED
24    print(result.get("output"))              # model output (e.g. video URL)
25except InferenceTimeout as e:
26    print("still running:", e.request_id)    # re-poll later with this id
27except InferenceFailed as e:
28    print("failed:", e.detail)
29
30# Fast models (<=600s) can use the one-liner instead:
31# result = segmind.run("sync.so-react-1", **payload)

API Endpoint

POSThttps://api.segmind.com/v1/sync.so-react-1

Parameters

audio_urlrequired
string (uri)

URL for audio synchronization. Use clear files for precision.

video_urlrequired
string (uri)

URL for video synchronization. Use high-resolution video links.

auto_active_speaker_detectionoptional
boolean

Enable to sync with multi-speaker videos.

Default: false
model_modeoptional
string

Select the edit region. 'Face' is ideal for general use.

Default: "face"
Allowed values :
"lips""face""head"
occlusion_detection_enabledoptional
boolean

Detects video occlusion. Disable for faster processing.

Default: false
promptoptional
string

Emotion to display on model. Use 'happy' for positive scenes.

Default: "happy"
Allowed values :
"happy""sad""angry""disgusted""surprised""neutral"
sync_modeoptional
string

Audio-video sync setting. Use 'bounce' for smooth looping.

Default: "bounce"
Allowed values :
"loop""bounce""cut_off""silence""remap"
temperatureoptional
number

Expression intensity. 0.5 gives balanced expressions.

Default: 0.5Range: 0 - 1

Response Type

Returns: Video

Asynchronous requests (v2)

Use Async for video, long-running (>~60s), or high-concurrency workloads; Sync is simplest for fast image & LLM calls. Async submits a request and you poll it to completion.

  1. 1
    POST /v2/sync.so-react-1

    Submitreturns request_id, status_url, response_url

  2. 2
    GET /v2/requests/{id}/status

    Polluntil COMPLETED or FAILED

  3. 3
    GET /v2/requests/{id}

    Resultfinal response body

Status states

QUEUEDAccepted, waiting for a worker
PROCESSINGRunning on a worker
COMPLETEDDone — result body is ready
FAILEDErrored (incl. content/RAI blocks)
  • A FAILED request is served as HTTP 422 — the body still carries the error detail.
  • An unknown or expired request_id returns HTTP 404.
  • Results are retained for 1 hour, then expire.
  • Content / RAI blocks surface as FAILED, not a separate state.
  • Track completion by polling the status endpoint.

Common Error Codes

The API returns standard HTTP status codes. Detailed error messages are provided in the response body.

400

Bad Request

Invalid parameters or request format

401

Unauthorized

Missing or invalid API key

403

Forbidden

Insufficient permissions

404

Not Found

Model or endpoint not found

406

Insufficient Credits

Not enough credits to process request

429

Rate Limited

Too many requests

500

Server Error

Internal server error

502

Bad Gateway

Service temporarily unavailable

504

Timeout

Request timed out