├── README.md
├── send.py
└── receive.py


/README.md:
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 1 | # Simple Webcam Streaming
 2 | 
 3 | OpenCV and UDP
 4 | 
 5 | Test with Python 3.7.3, OpenCV 4.1.0
 6 | 
 7 | I understand this is not the best way to do video streaming but it works for me.
 8 | 
 9 | There are still some issues:
10 | 
11 | 1. a flicker at second frame ???
12 | 2. flickering when draging the frame window for the first time???
13 | 3. not tolerable to data lost (should generate packet loss to simulate the test)
14 | 


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/send.py:
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 1 | import socket
 2 | import numpy as np
 3 | import cv2 as cv
 4 | 
 5 | 
 6 | addr = ("127.0.0.1", 65534)
 7 | buf = 512
 8 | width = 640
 9 | height = 480
10 | cap = cv.VideoCapture(0)
11 | cap.set(3, width)
12 | cap.set(4, height)
13 | code = 'start'
14 | code = ('start' + (buf - len(code)) * 'a').encode('utf-8')
15 | 
16 | 
17 | if __name__ == '__main__':
18 |     s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
19 |     while(cap.isOpened()):
20 |         ret, frame = cap.read()
21 |         if ret:
22 |             s.sendto(code, addr)
23 |             data = frame.tostring()
24 |             for i in range(0, len(data), buf):
25 |                 s.sendto(data[i:i+buf], addr)
26 |             # cv.imshow('send', frame)
27 |             # if cv.waitKey(1) & 0xFF == ord('q'):
28 |                 # break
29 |         else:
30 |             break
31 |     # s.close()
32 |     # cap.release()
33 |     # cv.destroyAllWindows()
34 | 


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/receive.py:
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 1 | import socket
 2 | import numpy as np
 3 | import cv2 as cv
 4 | 
 5 | 
 6 | addr = ("127.0.0.1", 65534)
 7 | buf = 512
 8 | width = 640
 9 | height = 480
10 | code = b'start'
11 | num_of_chunks = width * height * 3 / buf
12 | 
13 | if __name__ == '__main__':
14 |     s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
15 |     s.bind(addr)
16 |     while True:
17 |         chunks = []
18 |         start = False
19 |         while len(chunks) < num_of_chunks:
20 |             chunk, _ = s.recvfrom(buf)
21 |             if start:
22 |                 chunks.append(chunk)
23 |             elif chunk.startswith(code):
24 |                 start = True
25 | 
26 |         byte_frame = b''.join(chunks)
27 | 
28 |         frame = np.frombuffer(
29 |             byte_frame, dtype=np.uint8).reshape(height, width, 3)
30 | 
31 |         cv.imshow('recv', frame)
32 |         if cv.waitKey(1) & 0xFF == ord('q'):
33 |             break
34 | 
35 |     s.close()
36 |     cv.destroyAllWindows()
37 | 


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