TypeError：需要类似字节的对象，而不是'str'如何解决这个问题？从树莓派

Question

流媒体视频，使用此代码192.168.0.6:8081 ...

[编辑基于评论&丹尼尔]

import numpy as np 
import cv2 
import socket 


class VideoStreamingTest(object): 
def __init__(self): 

    #self.server_socket = socket.socket() 
    #self.server_socket.bind(('192.168.0.6', 8081)) 
    #self.server_socket.listen(0) 

    #self.connection, self.client_address = self.server_socket.accept() 
    #self.connection = self.connection.makefile('rb') 
    #self.streaming() 
    self.socket = socket.socket() 
    self.connection = self.socket.connect(('192.168.0.6', 8081)) 
    #self.socket.connect(('192.168.0.6', 8081)) 
    self.streaming() 

def streaming(self): 

    try: 
     #print ("Connection from: ", self.client_address) 
     print ("Streaming...") 
     print ("Press 'q' to exit") 

     stream_bytes = b' ' 
     while True: 

      stream_bytes += self.socket.recv(1024) 
      first = stream_bytes.find('\xff\xd8') 
      last = stream_bytes.find('\xff\xd9') 
      if first != -1 and last != -1: 
       jpg = stream_bytes[first:last + 2] 
       stream_bytes = stream_bytes[last + 2:] 
       #image = cv2.imdecode(np.fromstring(jpg, dtype=np.uint8), cv2.CV_LOAD_IMAGE_GRAYSCALE) 
       image = cv2.imdecode(np.fromstring(jpg, dtype=np.uint8), cv2.CV_LOAD_IMAGE_UNCHANGED) 
       cv2.imshow('image', image) 

       if cv2.waitKey(1) & 0xFF == ord('q'): 
        break 
    finally: 
     #self.connection.close() 
     self.socket.close() 

if __name__ == '__main__': 
    VideoStreamingTest() 

*但是我正在以下错误:(编辑）:(*

Streaming... 
Press 'q' to exit 
Traceback (most recent call last): 
    File "C:/Users/tiger/Desktop/take_the_stream_from_pi.py", line 48, in <module> 
VideoStreamingTest() 
    File "C:/Users/tiger/Desktop/take_the_stream_from_pi.py", line 19, in __init__ 
self.streaming() 
    File "C:/Users/tiger/Desktop/take_the_stream_from_pi.py", line 32, in streaming 
first = stream_bytes.find('\xff\xd8') 
TypeError: a bytes-like object is required, not 'str' 

我该如何解决这个问题？ （PS：试图打开从PI摄像头（这在我的网页浏览器上192.168.0.6:8081作品）流式窗口，我用这个程序PC）

Answer 1

connect_ex返回一个整数，这是一个错误代码或0，如果没有错误。您需要通过套接字本身读取，而不是通过该调用的结果。

另请注意，正如文档中提到的，没有read方法;它叫recv。

stream_bytes += self.socket.recv(1024) 

此外，如在评论中指出的那样，你不需要调用self.connection.close，出于同样的原因。