Moviepy不识别调整大小函数

import moviepy.editor as mp
import cv2

# 加载视频
video = mp.VideoFileClip("input.mp4")

# 获取视频的宽度和高度
width, height = video.size

# 设置目标宽度和高度
target_width = 640
target_height = 480

# 创建一个空白的视频容器
new_video = mp.VideoClip(lambda x: x, duration=video.duration)

# 遍历视频的每一帧
for t in range(int(video.duration * video.fps)):
    # 获取当前时间的视频帧
    frame = video.get_frame(t / video.fps)

    # 调整帧的大小
    resized_frame = cv2.resize(frame, (target_width, target_height))

    # 将调整大小后的帧添加到新的视频容器中
    new_video = new_video.set_frame(t / video.fps, resized_frame)

# 保存调整大小后的视频
new_video.write_videofile("output.mp4")