我正在尝试将树莓派中的帧发送到其他PC我遇到了一些python2代码,但我将其更改为python3。然后出现此错误。我只能用字节连接字符串。所以我试图将字节更改为字符串(utf-8)。但我说有些字符不在utf-8中...我该如何解决?错误似乎相互矛盾...我不应该将其转换为字符串吗?(请注意,我搜索了该错误,并说我正在尝试解码不存在的字符,但未给出答案。(原始代码:Sending live video frame over network in python opencv))
Server.py
PORT=8089
s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
print('Socket created')
s.bind((HOST,PORT))
print('Socket bind complete')
s.listen(10)
print('Socket now listening')
conn,addr=s.accept()
### new
data = ""
payload_size = struct.calcsize("H")
while True:
while len(data) < payload_size:
incomingData = conn.recv(4096)
data += incomingData.decode("utf-8")
packed_msg_size = data[:payload_size]
data = data[payload_size:]
msg_size = struct.unpack("L", packed_msg_size)[0]
while len(data) < msg_size:
data += conn.recv(4096)
frame_data = data[:msg_size]
data = data[msg_size:]
###
frame=pickle.loads(frame_data)
print(frame)
cv2.imshow('frame',frame)
Client.py
import cv2
import numpy as np
import socket
import sys
import pickle
import struct ### new code
cap=cv2.VideoCapture(0)
clientsocket=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
clientsocket.connect(('localhost',8089))
while True:
ret,frame=cap.read()
data = pickle.dumps(frame) ### new code
clientsocket.sendall(struct.pack("L", len(data))+data) ### new code
第一错误
File "Server.py", line 58, in <module>
data += conn.recv(4096)
TypeError: can only concatenate str (not "bytes") to str
第二错误
File "Server.py", line 60, in <module>
data += str(conn.recv(4096), "utf-8")
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xa4 in position 0: invalid start byte
对于第一个错误,您正在将data
定义为空文本字符串(data = ""
),然后尝试将其与字节连接。
相反,尝试将数据定义为空字节字符串(data = b""
),并从传入数据中删除所有.decode()
调用,以使所有数据以字节为单位。