Created
August 23, 2019 07:19
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send capture image over udp socket
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import cv2 | |
import socket | |
import struct | |
from datetime import datetime | |
cap = cv2.VideoCapture(1) | |
fps = cap.get(cv2.CAP_PROP_FPS) | |
font = cv2.FONT_HERSHEY_SIMPLEX | |
JPEG_QUALITY = 70 | |
encode_param = [int(cv2.IMWRITE_JPEG_QUALITY), JPEG_QUALITY] | |
white = (255,255,255) | |
black = (0, 0, 0) | |
FONT_SCALE = 0.5 | |
BUFFER_SIZE = 1024 | |
ADDR = ("127.0.0.1", 5252) | |
HEADER_START = b"START" | |
def build_header(size): | |
size = struct.pack("@I", size) | |
header = HEADER_START + size | |
return header | |
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) | |
while cap.isOpened(): | |
ret, frame = cap.read() | |
if not ret: | |
continue | |
frame = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY) | |
# frame = cv2.threshold(frame, 128, 255, cv2.THRESH_BINARY)[1] | |
result, enc_img = cv2.imencode('.jpg', frame, encode_param) | |
data = enc_img.tostring() | |
enc_size = len(data) | |
#send header | |
header = build_header(enc_size) | |
sock.sendto(header, ADDR) | |
#send data | |
counter = 0 | |
while counter < enc_size: | |
buf = data[counter: counter+BUFFER_SIZE] | |
sock.sendto(buf, ADDR) | |
counter += BUFFER_SIZE | |
cv2.putText(frame, str(enc_size), (10,15), | |
font, FONT_SCALE, black, 2, cv2.LINE_AA) | |
cv2.imshow("source", frame) | |
if cv2.waitKey(1)== 27: | |
break | |
cap.release() | |
cv2.destroyAllWindows() |
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