如何在python中将视频分割成4个相等的部分？

pip install opencv-python

import cv2

def split_video(video_path, output_path):
    # 打开视频文件
    video = cv2.VideoCapture(video_path)
    
    # 获取视频的总帧数和帧率
    total_frames = int(video.get(cv2.CAP_PROP_FRAME_COUNT))
    fps = video.get(cv2.CAP_PROP_FPS)
    
    # 计算每个部分的帧数
    frames_per_part = total_frames // 4
    
    # 设置输出视频的编解码器和帧率
    fourcc = cv2.VideoWriter_fourcc(*'mp4v')
    out = cv2.VideoWriter(output_path, fourcc, fps, (int(video.get(cv2.CAP_PROP_FRAME_WIDTH)), int(video.get(cv2.CAP_PROP_FRAME_HEIGHT))))
    
    # 分割视频
    for i in range(4):
        start_frame = i * frames_per_part
        end_frame = (i + 1) * frames_per_part
        
        # 设置当前帧为起始帧
        video.set(cv2.CAP_PROP_POS_FRAMES, start_frame)
        
        # 逐帧写入输出视频
        while start_frame < end_frame:
            ret, frame = video.read()
            out.write(frame)
            start_frame += 1
    
    # 释放资源
    video.release()
    out.release()

split_video('input_video.mp4', 'output_video.mp4')