Video Gen

🎬 Video Gen

Generate videos from text descriptions using Google Veo 3 (REST API, async polling).

How It Works

1. Sends prompt to Veo 3 predictLongRunning endpoint
2. Polls operation status every 10s until done (up to 5 min)
3. Downloads generated MP4 from returned URI
4. Uploads to Feishu and sends as file message

Model

• Current: veo-3.0-generate-001 (Veo 3, with native audio)
• Previous: veo-2.0-generate-001 (Veo 2, no audio)
• Also available: veo-3.0-fast-generate-001 (faster, lower quality), veo-3.1-generate-preview (latest)
• Veo 3 generates 8-second videos with synchronized audio from text prompts
• durationSeconds and personGeneration params not supported in Veo 3 — fixed duration 8s
• Download URL requires API key appended and follows 302 redirect

Configuration

Requires in openclaw.json:

{
  "plugins": {
    "entries": {
      "video-gen": {
        "config": {
          "geminiApiKey": "AIza..."
        }
      }
    }
  }
}

Also needs Feishu channel config (appId / appSecret) for file delivery.

Usage

The agent calls generate_video tool with:

• prompt (required): Detailed English description of the video
• duration (optional): 5-8 seconds, default 5
• aspect_ratio (optional): "16:9" (landscape) or "9:16" (portrait), default "16:9"

API Flow

POST /v1beta/models/veo-3.0-generate-preview:predictLongRunning
  → returns operation name
GET /v1beta/{operationName}
  → poll until done=true
  → extract video URI from response
GET {videoUri}
  → download MP4

Notes

• Generation takes 1-3 minutes (async)
• Veo 3 固定生成 8 秒视频，duration 参数无效
• personGeneration: "allow_adult" 在 Veo 3 不支持，已移除
• Gateway uses --use-env-proxy so HTTP fetch auto-routes through HTTP_PROXY
• Download URL 需要追加 API key 并跟随 302 重定向
• 飞书发送视频必须用 msg_type: "media"（不是 "file"，否则报 230055 类型不匹配）
• Output: MP4 file sent as Feishu media message

Available Models

veo-2.0-generate-001        # Veo 2, no audio
veo-3.0-generate-001        # Veo 3, native audio ← current
veo-3.0-fast-generate-001   # Veo 3 Fast, faster/lower quality
veo-3.1-generate-preview    # Veo 3.1, latest preview
veo-3.1-fast-generate-preview # Veo 3.1 Fast