python进程池 多进程共享类实例

目录

进程池进行读写视频

进程池使用例子：

python 进程池提取mp3音频

python 多进程共享类实例demo

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进程池进行读写视频

import cv2
import os
import multiprocessing as mp
import glob
from multiprocessing import Pool, Manager

def save_video(output_video_path, m_queue, frame_width, frame_height, fps):
    print(f"开始保存视频: {output_video_path}")
    fourcc = cv2.VideoWriter_fourcc(*'mp4v')
    out = cv2.VideoWriter(output_video_path, fourcc, fps, (frame_width, frame_height))

    if not out.isOpened():
        print("视频写入器初始化失败！")
        return

    while True:
        ret,frame = m_queue.get()
        if ret ==1:  # 检查结束标志
            break
        out.write(frame)

    out.release()
    print(f"视频保存完成: {output_video_path}")


def pro