Veo视频生成请求体

{
    "model": "google/veo3",
    "prompt": "一只可爱的小猫在花园里追逐蝴蝶，阳光明媚，画面温馨，电影级画质",
    "negative_prompt": "模糊，低质量，变形，人物扭曲",
    "aspect_ratio": "16:9",
    "duration_seconds": 8,
    "resolution": "720p",
    "enhance_prompt": true,
    "generate_audio": true,
    "person_generation": "allow_adult",
    "sample_count": 1,
    "seed": 42,
    "storage_uri": "gs://your-bucket/output/",
    "image": "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUA...",
    "last_frame": "gs://your-bucket/end_frame.jpg"
}