在python中不使用openCV读取视频文件

import subprocess

def read_video_file(file_path):
    command = ['ffmpeg', '-i', file_path, '-f', 'rawvideo', '-']
    process = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.DEVNULL)

    while True:
        # 读取视频帧数据
        frame_data = process.stdout.read(width * height * 3)

        if len(frame_data) != width * height * 3:
            break

        # 处理视频帧数据
        # ...

    process.stdout.close()
    process.wait()

# 调用示例
read_video_file('video.mp4')