目前我在web上还是只有10秒（美国vpn free account），测试了一个15s的prompt

prompt:
video_attributes:
total_duration: 15s
frame_rate: "24fps"
film_grain: "精细的35mm胶片颗粒，模拟邵氏电影质感"
tone: "紧张、悬疑、山雨欲来，充满东方古典主义美学"
color_palette: "温暖的钨丝灯色调与阴影中的冷色调形成对比，色彩饱和度较低，呈现复古质感"
audio:
ambient: "客栈外风沙声，木质结构被风吹动的吱嘎声，远处隐约的马蹄声"
sequence:
- shot_1:
duration: "6s"
composition: "固定机位的全景镜头，采用28mm广角镜头，构图对称，类似舞台剧照，展现客栈大堂全貌"
camera_motion: "固定机位，无运动"
lighting: "从门窗透进的黄昏天光作为主光，照亮空气中的灰尘。角落里点着几盏油灯，形成明暗对比强烈的光影区域"
subject:
description: "一位身着白衣的蒙面女侠（玉娇龙），身形挺拔，眼神锐利"
wardrobe: "白色棉麻劲装，头戴一顶遮住上半张脸的斗笠，腰间佩着一把细长的剑"
scene:
location: "边境沙漠中的一间龙门客栈"
time_of_day: "黄昏"
environment: "大堂内陈设简陋，只有几张粗糙的木桌，几个东厂番子伪装的茶客分散在角落，气氛凝重"
visual_details:
action: "女侠缓缓走进客栈，停在中央，目光扫视全场。一名番子假装倒茶，手却悄悄按在刀柄上"
props: "桌上的粗瓷茶碗，摇曳的油灯，墙上挂着的“龙门客栈”牌匾"
transition_to_next: "硬切 (Hard Cut)"
- shot_2:
duration: "5s"
composition: "过肩中景镜头，从女侠身后拍摄，焦点对准对面桌上为首的番子头目，使用50mm镜头"
camera_motion: "极其缓慢地向前推进 (Slow push-in)，增强对峙感"
lighting: "番子头目的脸被桌上油灯的光从下往上照亮，显得阴险狡诈"
subject:
description: "一个中年男子，面容阴鸷，留着八字胡，眼神像毒蛇一样"
wardrobe: "深色锦衣，手指上戴着一枚玉扳指"
scene:
location: "客栈大堂内"
time_of_day: "黄昏"
environment: "背景中的女侠身影略微失焦，但斗笠和剑的轮廓清晰可见"
visual_details:
action: "番子头目拿起茶杯，轻轻吹去浮沫，嘴角露出一丝冷笑，与女侠进行无声的对峙"
props: "冒着热气的茶杯，他腰间的令牌一闪而过"
transition_to_next: "动作匹配剪辑 (Cut on Action)"
- shot_3:
duration: "4s"
composition: "特写镜头，对准番子头目将茶杯猛地顿在桌上的手"
camera_motion: "固定机位"
lighting: "顶光，强调手的动作和力量感"
subject:
description: "一只布满老茧、充满力量的手"
wardrobe: "锦衣的袖口"
scene:
location: "客栈的木桌上"
time_of_day: "黄昏"
environment: "桌面粗糙的木纹清晰可见"
visual_details:
action: "茶杯被重重放下，茶水四溅。在杯子落桌的瞬间，背景中传来剑出鞘的清脆声音，暗示战斗一触即发"
props: "溅起的茶水，粗瓷茶杯"
transition_to_next: "淡出到黑 (Fade to black)"