This is my code snippet that sends data over ethernet from one PC to another which is working fine.

import cv2, socket, pickle
import numpy as np
while True:
    ret, photo = cap.read()
    ret, buffer = cv2.imencode(".jpg",photo, [int(cv2.IMWRITE_JPEG_QUALITY),30])
    x_as_bytes = pickle.dumps(buffer)
    socket.sendto((x_as_bytes),(server_ip,server_port))

At the receiver end, I am not able to decode it. It says:

Traceback (most recent call last):
    File "receive.py", line 12, in <module>
       data=pickle.loads(data)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xff in position 0: ordinal not in range(128)

This is the snippet at the receiver end

while True:
    x=s.recvfrom(1000000)
    clientip = x[1][0]
    data=x[0]
    print(data)
    data=pickle.loads(data) #ERROR IN THIS LINE
    print(type(data))
    data = cv2.imdecode(data, cv2.IMREAD_COLOR)
    cv2.imshow('server', data)
    if cv2.waitKey(10) == 13:
        break

CodePudding user response：

Why are you even pickling the data? You can send binary data via UDP anyway:

# Synthetic image
im = np.random.randint(0, 256,(480, 640, 3), dtype=np.uint8)

# JPEG encode
ret, buffer = cv2.imencode(".jpg", im, [int(cv2.IMWRITE_JPEG_QUALITY),30])

# Send
socket.sendto(buffer.tobytes(), (server_ip,server_port))

Then at the receiving end:

JPEG = s.recvfrom(1000000)
im = cv2.imdecode(np.frombuffer(JPEG, dtype=np.uint8), cv2.IMREAD_UNCHANGED)