,从0开始编号cap = cv2.VideoCapture(0)#从视频或摄像头中读取一帧(即一张图像),返回是否成功标识ret(True代表成功,False代表失败),img为读取的视频帧ret,frame...= cap.read()----#完整的读取视频流并播放视频流代码 # -*- coding:utf-8 -*-import cv2cap = cv2.VideoCapture("video.avi"...,VideoWriter_fourcc为视频编解码器,20为帧播放速率,(640,480)为视频帧大小videoWriter = cv2.VideoWriter('video.avi', cv2.VideoWriter_fourcc...('I', '4', '2', '0'), 20, (640,480))#向视频文件写入一帧videoWriter.write(frame)#详解cv2.VideoWriter_fourcc对象(摘自Learning...)),int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT)))videoWriter = cv2.VideoWriter('video.avi', cv2.VideoWriter_fourcc