单个的视频转换图片参看：
python opencv 把视频转为图片
对于多个视频，采用多线程处理方法
video_path为待转换视频的路径，pic_path为输出图像的路径，输出的图像统一保存在pic_path下面与相应视频名相同的文件夹下面。
代码如下：
# coding=utf-8 import cv2 import os import threading from threading import Lock, Thread video_path = "./video/" pic_path = "./pic/" filelist = os.listdir(video_path) def video2pic(filename): # print(filename) cnt = 0 dnt = 0 if os.path.exists(pic_path + str(filename)): pass else: os.mkdir(pic_path + str(filename)) cap = cv2.VideoCapture(video_path + str(filename)) # 读入视频 while True: # get a frame ret, image = cap.read() if image is None: break # show a frame w = image.shape[1] h = image.shape[0] if (cnt % 20) == 0: cv2.imencode('.jpg', image)[1].tofile(pic_path + str(filename) + '/' + str(dnt) + '.jpg') print(pic_path + str(filename) + '/' + str(dnt) + '.jpg') dnt = dnt + 1 cnt = cnt + 1 if cv2.waitKey(1) & 0xFF == ord('q'): break cap.release() if __name__ == '__main__': for filename in filelist: threading.Thread(target=video2pic, args=(filename, )).start()