minimax/h3/video-extendA partir de 28 créditos por um clipe de 5 segundos· Estender vídeoContinue um clipe com o MiniMax H3: o último quadro do seu vídeo abre um novo segmento de 4 a 15 segundos, e você recebe um único arquivo com o original e a continuação unidos, em 768p ou 2k.
Chame com o nome de modelo minimax/h3/video-extend em POST /jobs/createTask, a partir de 28 créditos por um clipe de 5 segundos (US$ 0,28). Contas novas ganham 30 créditos grátis para você testar primeiro no Playground.
- Criar vídeo
- Imagem para vídeo
- Referências para vídeo
- Estender vídeo
- Até 2K
- Clipes de 4 a 15 s
- Quadro inicial e final
- Até 9 imagens de referência
- 6 proporções
minimax/h3/video-extendPOST https://api.popnow.ai/api/v1/jobs/createTask# 1. Create the task. Keep the Idempotency-Key if you retry after a network error.
export IDEMPOTENCY_KEY="$(uuidgen)"
curl -X POST https://api.popnow.ai/api/v1/jobs/createTask \
-H "Authorization: Bearer $POPNOW_API_KEY" \
-H "Content-Type: application/json" \
-H "Idempotency-Key: $IDEMPOTENCY_KEY" \
-d '{
"model": "minimax/h3/video-extend",
"input": {
"prompt": "A slow aerial shot drifting over a misty pine forest at sunrise",
"video_url": "https://media.popnow.ai/effects/flower-bloom-1abd6efb.mp4",
"resolution": "768p",
"duration_seconds": 5
}
}'
# 2. Copy data.taskId from the response, then poll until state is succeeded, failed, canceled or expired.
TASK_ID="TASK_ID_FROM_RESPONSE"
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=$TASK_ID" \
-H "Authorization: Bearer $POPNOW_API_KEY"// Node 18+ (or any runtime with fetch). Keep the API key on your server.
const BASE = "https://api.popnow.ai/api/v1";
const headers = { Authorization: `Bearer ${process.env.POPNOW_API_KEY}` };
const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
async function call(path, init = {}) {
const res = await fetch(BASE + path, { ...init, headers: { ...headers, ...init.headers } });
const body = await res.json();
if (body.code !== 200) throw new Error(`${body.code} ${body.msg}`);
return body.data;
}
const { taskId } = await call("/jobs/createTask", {
method: "POST",
headers: { "Content-Type": "application/json", "Idempotency-Key": crypto.randomUUID() },
body: JSON.stringify({
"model": "minimax/h3/video-extend",
"input": {
"prompt": "A slow aerial shot drifting over a misty pine forest at sunrise",
"video_url": "https://media.popnow.ai/effects/flower-bloom-1abd6efb.mp4",
"resolution": "768p",
"duration_seconds": 5
}
}),
});
// Poll with backoff. A finished task may still be copying files: wait while an asset is pending.
let task;
for (let delay = 2000; ; delay = Math.min(delay * 1.5, 15000)) {
await sleep(delay);
task = await call(`/jobs/recordInfo?taskId=${taskId}`);
const copying = (task.output?.assets ?? []).some((a) => a.pending && !a.unavailable);
if (["succeeded", "failed", "canceled", "expired"].includes(task.state) && !copying) break;
}
if (task.state !== "succeeded") throw new Error(`${task.state}: ${task.errorMessage ?? "no detail"}`);
// Each asset has a signed url (no API key needed) that expires at expiresAt: save the file.
for (const asset of task.output.assets) console.log(asset.url);import os, time, uuid, requests
BASE = "https://api.popnow.ai/api/v1"
HEADERS = {"Authorization": f"Bearer {os.environ['POPNOW_API_KEY']}"}
def call(method, path, **kwargs):
body = requests.request(method, BASE + path, headers={**HEADERS, **kwargs.pop("headers", {})}, timeout=30, **kwargs).json()
if body["code"] != 200:
raise RuntimeError(f'{body["code"]} {body["msg"]}')
return body["data"]
task_id = call(
"POST",
"/jobs/createTask",
headers={"Idempotency-Key": str(uuid.uuid4())}, # reuse it if you retry
json={
"model": "minimax/h3/video-extend",
"input": {
"prompt": "A slow aerial shot drifting over a misty pine forest at sunrise",
"video_url": "https://media.popnow.ai/effects/flower-bloom-1abd6efb.mp4",
"resolution": "768p",
"duration_seconds": 5
}
},
)["taskId"]
# Poll with backoff. A finished task may still be copying files: wait while an asset is pending.
delay = 2.0
while True:
time.sleep(delay)
task = call("GET", "/jobs/recordInfo", params={"taskId": task_id})
assets = (task.get("output") or {}).get("assets") or []
copying = any(a.get("pending") and not a.get("unavailable") for a in assets)
if task["state"] in ("succeeded", "failed", "canceled", "expired") and not copying:
break
delay = min(delay * 1.5, 15.0)
if task["state"] != "succeeded":
raise RuntimeError(f'{task["state"]}: {task.get("errorMessage", "no detail")}')
# Each asset has a signed url (no API key needed) that expires at expiresAt: save the file.
for asset in assets:
print(asset["url"])O input é montado a partir do schema abaixo, então passa na validação como está. Troque o prompt e os links pelos seus.
Preço
| Opção | Créditos por segundo | ≈ USD |
|---|---|---|
resolution 768p | 5,55 | US$ 0,056 |
resolution 2K | 8,7 | US$ 0,087 |
1 crédito = US$ 0,01 · Todas as opções e preços: GET /models/minimax/h3/video-extend
Cada tarefa é arredondada para cima em créditos inteiros, então uma execução no nível mais baixo custa 28 créditos por um clipe de 5 segundos (US$ 0,28).
Limites
- Duração do clipe
- 4–15 s
- Resoluções
- 768p · 2K
- Tamanho do prompt (caracteres)
- 7,000
- Clipe de entrada mais longo
- 60 s
Parâmetros
Estes campos vêm do mesmo schema que usamos para validar cada requisição. Campos que não estão na lista são rejeitados.
promptstringObrigatórioDescribe what happens next: the action that follows, the camera move and the sound.
video_urlstringObrigatórioO clipe a ser trabalhado.
last_image_urlstringOpcionalQuadro final opcional, para o clipe terminar exatamente onde você quer.
resolutionstringOpcionalMuda o preçoTamanho de saída. Maior fica mais nítido e custa mais.
duration_secondsintegerOpcionalMuda o preçoQuanto tempo dura o clipe. Cobrado por segundo.
JSON Schema bruto
{
"additionalProperties": false,
"properties": {
"duration_seconds": {
"default": 5,
"description": "Length of the new segment in seconds, from 4 to 15. The source clip is added on top and is not billed.",
"maximum": 15,
"minimum": 4,
"type": "integer"
},
"enable_prompt_expansion": {
"default": false,
"description": "Accepted for compatibility only. This endpoint does not expand prompts, so the only allowed value is false.",
"enum": [
false
],
"type": "boolean"
},
"last_image_url": {
"contentMediaType": [
"image/jpeg",
"image/png",
"image/webp",
"image/gif"
],
"description": "Optional target end frame: the new segment closes on this image.",
"format": "uri",
"type": "string"
},
"prompt": {
"description": "Describe what happens next: the action that follows, the camera move and the sound.",
"maxLength": 7000,
"minLength": 1,
"type": "string"
},
"resolution": {
"default": "768p",
"description": "Resolution of the new segment. It sets how sharp the new part is generated; match your source clip.",
"enum": [
"768p",
"2k"
],
"type": "string"
},
"video_url": {
"contentMediaType": [
"video/mp4",
"video/webm",
"video/quicktime"
],
"description": "The clip to continue: MP4, MOV or WebM, up to 60 seconds. Its last frame opens the new segment, and the result is your clip with the new segment joined on.",
"format": "uri",
"minLength": 1,
"type": "string"
}
},
"required": [
"prompt",
"video_url"
],
"type": "object"
}Respostas, consultas e callbacks
Todos os modelos funcionam do mesmo jeito: crie uma tarefa e depois consulte ou espere o callback.
Veja o preço antes
curl -X POST https://api.popnow.ai/api/v1/jobs/quote \
-H "Authorization: Bearer $POPNOW_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "minimax/h3/video-extend",
"input": {
"prompt": "A slow aerial shot drifting over a misty pine forest at sunrise",
"video_url": "https://media.popnow.ai/effects/flower-bloom-1abd6efb.mp4",
"resolution": "768p",
"duration_seconds": 5
}
}'Mesmo corpo do createTask. Retorna a cobrança esperada e a máxima possível, sem rodar nada.
Aceita
HTTP/1.1 202 Accepted
{
"code": 200,
"msg": "success",
"data": {
"taskId": "task_01k3m8x9q2z4v7n5p6r8s0t1w3",
"state": "queued"
},
"request_id": "req_example_create"
}HTTP 202 quer dizer que a tarefa foi aceita e os créditos estão reservados, ainda não cobrados. A cobrança final nunca passa da reserva.
Consultar status
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=$TASK_ID" \
-H "Authorization: Bearer $POPNOW_API_KEY"Consulte a cada poucos segundos, espaçando cada vez mais, e pare quando state for succeeded, failed, canceled ou expired.
Tarefa pronta
{
"code": 200,
"msg": "success",
"data": {
"taskId": "task_01k3m8x9q2z4v7n5p6r8s0t1w3",
"model": "minimax/h3/video-extend",
"state": "succeeded",
"output": {
"assets": [
{
"url": "https://cdn.popnow.ai/tasks/task_01k3m8x9q2z4v7n5p6r8s0t1w3/output.mp4?signature=FROM_RESPONSE",
"expiresAt": "2026-10-17T12:20:00Z",
"mime": "video/mp4",
"width": 1280,
"height": 720,
"durationSeconds": 5
}
]
},
"settled": true
},
"request_id": "req_example_record"
}Baixe pela url antes de expiresAt. Precisa de um link novo depois? Peça com POST /common/download-url.
Verificar um callback
import { createHash, createHmac, timingSafeEqual } from "node:crypto";
import express from "express";
const app = express();
// express.raw keeps the exact bytes that were signed; express.json would not match.
app.post("/hooks/popnow", express.raw({ type: "application/json" }), (req, res) => {
const timestamp = req.header("X-Webhook-Timestamp");
const signature = req.header("X-Webhook-Signature") ?? "";
const body = JSON.parse(req.body.toString("utf8"));
const taskId = body.data?.taskId ?? body.task_id;
const digest = createHash("sha256").update(req.body).digest("hex");
const expected = createHmac("sha256", process.env.POPNOW_WEBHOOK_SECRET)
.update(`${taskId}.${timestamp}.${digest}`)
.digest("base64");
const ok = expected.length === signature.length && timingSafeEqual(Buffer.from(expected), Buffer.from(signature));
// Check the signature first, then reject anything older than five minutes.
if (!ok || Math.abs(Date.now() / 1000 - Number(timestamp)) > 300) return res.status(401).end();
res.status(200).end(); // answer fast, then fetch the task and store its files
});Com callBackUrl definida, enviamos a tarefa pronta para você. Confira a assinatura no corpo bruto antes de confiar nela.
Enviar um arquivo local
curl -X POST https://api.popnow.ai/api/v1/common/upload-url \
-H "Authorization: Bearer $POPNOW_API_KEY" \
-H "Content-Type: application/json" \
-d '{"contentType": "image/png", "bytes": 482113}'
# PUT the file bytes to data.uploadUrl with every header in data.headers, then commit it:
curl -X POST https://api.popnow.ai/api/v1/files/$FILE_ID/commit \
-H "Authorization: Bearer $POPNOW_API_KEY"
# The commit returns a popnow://f/... reference. Put it in any image, video or
# audio field of the task input instead of a public https URL.Links https públicos funcionam como estão. Arquivos locais passam antes por upload-url e commit.

