(Python2.7) OpenCV send frames through socket

I'm trying to send OpenCV frames through sockets, with the code below. The problem is that the video ends up splitting into several rows or columns.

I can only run with python2 (2.7)

obs: This code is not mine.

source: link

Client:

import socket
import numpy as np
import cv2


UDP_IP = "127.0.0.1"
UDP_PORT = 5005

cap = cv2.VideoCapture(0)
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
while 1:
    ret, frame = cap.read()
    cv2.imshow('frame', frame)

    d = frame.flatten()
    s = d.tostring()
    for i in range(20):
        sock.sendto(s[i*46080:(i+1)*46080], (UDP_IP, UDP_PORT))
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()

Server:

import socket
import numpy as np
import cv2


UDP_IP = "127.0.0.1"
UDP_PORT = 5005

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.bind((UDP_IP, UDP_PORT))
s = ""
while True:
    data, addr = sock.recvfrom(46080)
    s += data
    if len(s) == (46080*20):
        frame = np.fromstring(s, dtype='uint8')
        frame = frame.reshape(480, 640, 3)
        cv2.imshow('frame', frame)
        s = ""
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break