模型能力

视频扩展

通过提供源视频和描述后续内容的文本提示来扩展现有视频。结果是一个单一的视频，从输入的最后一帧无缝衔接，并继续生成内容。

您可以将源视频作为公共 URL、base64 编码的数据 URI 或来自 Files API 的 file_id 提供。有关使用 file_id 输入的信息，请参阅 Imagine → Files API Integration。

WARNING

duration 参数仅控制扩展部分的长度，而不是总输出长度。例如，如果您的输入视频为 10 秒，且您将 duration 设置为 5，则返回的视频将为 15 秒长（原始 10 秒 + 扩展 5 秒）。

python

import os
import xai_sdk

client = xai_sdk.Client(api_key=os.getenv("XAI_API_KEY"))

response = client.video.extend(
    prompt="The shot pans to an over the shoulder perspective. Calm controlled scene.",
    model="grok-imagine-video",
    video_url="<VIDEO_URL>",
    duration=10,
)

print(response.url)

python

import os
import time
import requests

headers = {
    "Content-Type": "application/json",
    "Authorization": f"Bearer {os.environ['XAI_API_KEY']}",
}

response = requests.post(
    "https://api.x.ai/v1/videos/extensions",
    headers=headers,
    json={
        "model": "grok-imagine-video",
        "prompt": "The shot pans to an over the shoulder perspective. Calm controlled scene.",
        "duration": 10,
        "video": {"url": "<VIDEO_URL>"},
    },
)

request_id = response.json()["request_id"]

while True:
    result = requests.get(
        f"https://api.x.ai/v1/videos/{request_id}",
        headers={"Authorization": headers["Authorization"]},
    )
    data = result.json()
    if data["status"] == "done":
        print(data["video"]["url"])
        break
    elif data["status"] in ("expired", "failed"):
        print(f"Request {data['status']}")
        break
    time.sleep(5)

javascript

import { xai } from "@ai-sdk/xai";
import { experimental_generateVideo as generateVideo } from "ai";

const source = await generateVideo({
    model: xai.video("grok-imagine-video-1.5"),
    prompt: "A cat sitting on a sunlit windowsill, tail gently swishing.",
    duration: 5,
    aspectRatio: "16:9",
    providerOptions: {
        xai: {
            pollTimeoutMs: 600000,
        },
    },
});

const sourceUrl = source.providerMetadata?.xai?.videoUrl;

const extended = await generateVideo({
    model: xai.video("grok-imagine-video"),
    prompt: "The cat turns its head, notices a butterfly, and leaps off.",
    duration: 6,
    providerOptions: {
        xai: {
            mode: "extend-video",
            videoUrl: sourceUrl,
            pollTimeoutMs: 600000,
        },
    },
});

const extendedVideoUrl = extended.providerMetadata?.xai?.videoUrl;
console.log(extendedVideoUrl);

bash

# Start the video extension request
REQUEST_ID=$(curl -s -X POST https://api.x.ai/v1/videos/extensions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $XAI_API_KEY" \
  -d '{
    "model": "grok-imagine-video",
    "prompt": "The shot pans to an over the shoulder perspective. Calm controlled scene.",
    "duration": 10,
    "video": {"url": "<VIDEO_URL>"}
  }' | jq -r '.request_id')

# Poll until the video is ready
while true; do
  RESULT=$(curl -s https://api.x.ai/v1/videos/$REQUEST_ID \
    -H "Authorization: Bearer $XAI_API_KEY")
  STATUS=$(echo "$RESULT" | jq -r '.status')
  if [ "$STATUS" = "done" ]; then
    echo "$RESULT" | jq -r '.video.url'
    break
  elif [ "$STATUS" = "failed" ] || [ "$STATUS" = "expired" ]; then
    echo "Request $STATUS"; echo "$RESULT" | jq .
    break
  fi
  sleep 5
done

视频编辑使用 /v1/videos/edits 端点和 Python SDK 中的 client.video.generate(video_url=...)。在 AI SDK 中，将 providerOptions.xai.mode 设置为 "edit-video" 或 "extend-video"，并传递 providerOptions.xai.videoUrl。这两种流程都使用相同的异步轮询模式，AI SDK 在 providerMetadata.xai.videoUrl 中返回 xAI 托管的输出 URL。

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视频扩展 ​

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模型能力

视频扩展

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