如何从 python 上的 wifi 摄像头压缩格式：h.264 获取 http stream？

Question

Hy. I am working on a project for school using a HD-eyewear Wifi Camera that uses H.264 compressed format, I have read a lot of documentation about how to get the frames from the camera. but I shouldn't manage my problem: My code looks like this:

import cv2

while True:
    cap = cv2.VideoCapture('http://admin:@192.168.10.1/videostream.asf?user=admin&pwd=') 
    ret, frame = cap.read()
    print(frame) 

I only want to see that it gets correctly the frames, but it drops errors like this:

[h264 @ 0x1e0a100] non-existing PPS 0 referenced

[h264 @ 0x1e0a100] non-existing PPS 0 referenced

[h264 @ 0x1e0a100] decode_slice_header error

[h264 @ 0x1e0a100] no frame!

I really apreciate the help: Thanks! :D

Answer 1

With a little help from comments, I could solve my problem, and works, with some initial frame loss.

import cv2
from threading import Thread
import time




url = ('http://admin:@192.168.10.1/videostream.asf?user=admin&pwd=')


class VideoStream(object):
    def __init__(self,url = ('http://admin:@192.168.10.1/videostream.asf?user=admin&pwd=')):
            self.capture = cv2.VideoCapture(url)
            self.thread = Thread(target=self.update, args=())
            self.thread.daemon = True
            self.thread.start()

    def update(self):
            while True:
                    if self.capture.isOpened():
                            (self.status, self.frame) = self.capture.read()
                    time.sleep(.01)

    def show_frame(self):
            cv2.imshow('frame', self.frame)
            key = cv2.waitKey(1)
            if key == ord('q'):
                    self.capture.release()
                    cv2.destroyAllWindows()
                    exit(1)

if __name__ == '__main__':
    video_stream = VideoStream()
    while True:
            try:
                    video_stream.show_frame()
            except AttributeError:
                    pass

Copied from this link: Video Streaming from IP Camera in Python Using OpenCV cv2.VideoCapture