HappyHorse 1.1 Serverless API
Generate cinematic video with synchronized native audio and multilingual lip-sync from text, an image, or reference images.
POST /v2/happyhorse-1.1 · 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 "prompt": "A majestic white horse galloping through golden wheat fields at sunset, cinematic slow motion, warm golden hour lighting, dust particles catching sunlight, shallow depth of field, professional nature documentary style",
11 "negative_prompt": "blurry, low quality, distorted, watermark, text",
12 "resolution": "720P",
13 "duration": 5,
14 "aspect_ratio": "16:9",
15 "prompt_extend": True,
16 "watermark": False,
17}
18job = client.submit_async("happyhorse-1.1", **payload)
19print(job.request_id) # available immediately
20try:
21 result = job.wait(timeout=900, interval=2.0)
22 print(result["status"]) # COMPLETED
23 print(result.get("output")) # model output (e.g. video URL)
24except InferenceTimeout as e:
25 print("still running:", e.request_id) # re-poll later with this id
26except InferenceFailed as e:
27 print("failed:", e.detail)
28
29# Fast models (<=600s) can use the one-liner instead:
30# result = segmind.run("happyhorse-1.1", **payload) 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 "prompt": "A majestic white horse galloping through golden wheat fields at sunset, cinematic slow motion, warm golden hour lighting, dust particles catching sunlight, shallow depth of field, professional nature documentary style",
11 "negative_prompt": "blurry, low quality, distorted, watermark, text",
12 "resolution": "720P",
13 "duration": 5,
14 "aspect_ratio": "16:9",
15 "prompt_extend": True,
16 "watermark": False,
17}
18job = client.submit_async("happyhorse-1.1", **payload)
19print(job.request_id) # available immediately
20try:
21 result = job.wait(timeout=900, interval=2.0)
22 print(result["status"]) # COMPLETED
23 print(result.get("output")) # model output (e.g. video URL)
24except InferenceTimeout as e:
25 print("still running:", e.request_id) # re-poll later with this id
26except InferenceFailed as e:
27 print("failed:", e.detail)
28
29# Fast models (<=600s) can use the one-liner instead:
30# result = segmind.run("happyhorse-1.1", **payload)API Endpoint
https://api.segmind.com/v1/happyhorse-1.1Parameters
promptrequiredstringDescribes the scene, subjects, motion, camera, and audio cues. Use cinematic detail (lighting, lens, dialogue) for richer video and synced native audio.
"A majestic white horse galloping through golden wheat fields at sunset, cinematic slow motion, warm golden hour lighting, dust particles catching sunlight, shallow depth of field, professional nature documentary style"aspect_ratiooptionalstringFrame shape for text-to-video (ignored when an image is supplied). Use 16:9 for landscape, 9:16 for vertical, 1:1 for social.
"16:9""16:9""9:16""1:1""4:3""3:4"durationoptionalintegerVideo length in seconds, from 3 to 15. Use 3-5s for quick social clips; 8-15s for fuller scenes and narratives.
5imageoptionalstring (uri)Optional first frame that triggers image-to-video mode. Provide a URL or base64 image to animate it; leave empty for text-to-video.
nullnegative_promptoptionalstringLists elements to suppress in the output. Use it to avoid blur, artifacts, watermarks, or text; tune per scene as needed.
"blurry, low quality, distorted, watermark, text"prompt_extendoptionalbooleanLLM-rewrites short prompts into richer cinematic instructions. Keep on for brief prompts; turn off when you need exact prompt control.
truereference_imagesoptionalstring[]Up to 9 reference image URLs or uploads that anchor characters, scenes, style, or products. Use for reference-to-video and multi-scene consistency.
resolutionoptionalstringOutput resolution. Pick 720P for fast drafts and previews; choose 1080P for final, delivery-ready cinematic video.
"720P""720P""1080P"seedoptionalintegerReproducibility seed (0-2147483647). Fix a seed to reproduce the same output; leave empty for fresh random variations.
nullwatermarkoptionalbooleanAdds an AI-generated watermark to the output. Disable for clean, production-ready video; enable to label generated content.
falseResponse 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
POST /v2/happyhorse-1.1Submit — returns request_id, status_url, response_url
- 2
GET /v2/requests/{id}/statusPoll — until COMPLETED or FAILED
- 3
GET /v2/requests/{id}Result — final response body
Status states
- 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.
Bad Request
Invalid parameters or request format
Unauthorized
Missing or invalid API key
Forbidden
Insufficient permissions
Not Found
Model or endpoint not found
Insufficient Credits
Not enough credits to process request
Rate Limited
Too many requests
Server Error
Internal server error
Bad Gateway
Service temporarily unavailable
Timeout
Request timed out