目前接觸到的視頻保存方法有兩種，一種是cv2.VideoWriter，另一種是imageio，對比下來imageio保存的錄像文件要比opencv保存的小很多，具體原因暫時不清楚。
存在的問題：
imageio保存的視頻不能獲得視頻總幀數這個屬性

import imageio import cv2 from tqdm import tqdmclass MyVideoWriter:def __init__(self, save_path, height=None, width=None, fps=25):self.save_path = save_pathself.height = heightself.width = widthself.fourcc = cv2.VideoWriter_fourcc(*'mp4v')self.cur_frame_id = -1self.fps = fpsself.videoWriter = Nonedef save(self, frame):self.cur_frame_id += 1if self.cur_frame_id == 0:if self.height is None or self.width is None:self.height, self.width, _ = frame.shapeself.videoWriter = cv2.VideoWriter(self.save_path, self.fourcc, self.fps, (self.width, self.height))self.videoWriter.write(frame)def release(self):if self.videoWriter:self.videoWriter.release()self.videoWriter = Nonedef __del__(self):self.release()# reader = imageio.get_reader("io.mp4") # for frame in tqdm(reader): # print("xxxx")# print(imageio.get_reader("cv.mp4").get_meta_data()) # cv_reader = cv2.VideoCapture("cv.mp4") # print(cv_reader.get(5), cv_reader.get(7))fps = 10cv_writer = MyVideoWriter("cv.mp4",fps=fps) io_writer = imageio.get_writer("io.mp4", fps=fps)rtsp = "rtsp://xxxxxxxxxxxxxxxxxxxxxx"cap = cv2.VideoCapture(rtsp) # cap = imageio.get_reader(rtsp) # print(cap.get_meta_data())for _ in range(1000):ret, frame = cap.read()cv_writer.save(frame)io_writer.append_data(frame[...,::-1])cv_writer.release() io_writer.close() cap.release()

總結

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