Speed up video playback on a client device

[shehzi-khan]

I'm trying to stream video from my raspberry pi using flask api in python by following your example code. So that I may process individual frames on my workstation. It is working fine as far as data delivery is concerned. However on client side the process of reading frames introduces a lag of 1-3 seconds that is undesirable in a real time application. I can view the video playback in my web browser without any latency that proves that my raspberry pi and network are innocent. The problem is with the method of reading individual frames from byte stream. Any thoughts about eliminating latency in such an application. Below is my code for client side application. Complete source to a sample application can be found here: https://github.com/shehzi-khan/video-streaming

import cv2
import urllib
import numpy as np

stream = urllib.urlopen('http://192.168.100.128:5000/video_feed')
bytes = ''
while True:
    bytes += stream.read(1024)
    a = bytes.find(b'\xff\xd8')
    b = bytes.find(b'\xff\xd9')
    if a != -1 and b != -1:
        jpg = bytes[a:b+2]
        bytes = bytes[b+2:]
        img = cv2.imdecode(np.fromstring(jpg, dtype=np.uint8), cv2.IMREAD_COLOR)
        cv2.imshow('Video', img)
        if cv2.waitKey(1) == 27:
            exit(0)