批量抽取视频帧，制作数据集

import cv2
import os

class VideoFrameExtractor:
    def __init__(self, video_folder, output_folder, frame_interval):
        self.video_folder = video_folder
        self.output_folder = output_folder
        self.frame_interval = frame_interval
        self.save_nums = 0

    def extract_frames(self, video_path):
        cap = cv2.VideoCapture(video_path