在另一个线程上编写视频(Python OpenCV)

import cv2
import threading

def write_video():
    # 设置视频编写参数
    width = 640
    height = 480
    fps = 30.0
    output_file = 'output.mp4'

    # 创建VideoWriter对象
    fourcc = cv2.VideoWriter_fourcc(*'mp4v')
    out = cv2.VideoWriter(output_file, fourcc, fps, (width, height))

    # 逐帧写入视频
    while True:
        # 从摄像头获取图像帧
        ret, frame = cap.read()
        if not ret:
            break

        # 对图像帧进行处理（例如，进行滤波、边缘检测等）
        processed_frame = process_frame(frame)

        # 写入视频
        out.write(processed_frame)

    # 释放资源
    cap.release()
    out.release()

def process_frame(frame):
    # 在这里进行图像处理操作
    # 例如，可以对图像进行滤波、边缘检测等操作
    processed_frame = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
    return processed_frame

# 创建摄像头对象
cap = cv2.VideoCapture(0)

# 创建视频编写线程
video_thread = threading.Thread(target=write_video)
video_thread.start()

# 在主线程中进行其他操作
# ...

# 等待视频编写线程结束
video_thread.join()