整體思路

server.py：用mss截圖，然後zlib壓縮後socket傳送

client：socket接收，zlib解壓縮，然後使用OpenCV播放

簡單介紹mss

An ultra fast cross-platform multiple screenshots module in pure Python using ctypes. 

具體去官網：https://github.com/BoboTiG/python-mss

直接上程式碼

server.py

from socket import socket
from threading import Thread
from zlib import compress
from mss import mss

# 截圖大小
WIDTH = int(1366 / 1)
HEIGHT = int(768 / 1)


def send_screenshot(conn):
    with mss() as sct:
        rect = {'top': 0, 'left': 0, 'width': WIDTH, 'height': HEIGHT}

        while 'recording':
            img = sct.grab(rect)
            # 壓縮等級 (0-9)
            # 並不一定是壓縮level越高越好，這裡要綜合考慮壓縮佔用時間和網路傳輸時間
            pixels = compress(img.bgra, 1)
            # 壓縮對比
            # level:0 size:4196683
            # level:1 size:248329
            # level:2 size:246512
            # level:9 size:196212
            size = len(pixels)
            size_len = (size.bit_length() + 7) // 8
            conn.send(bytes([size_len]))
            size_bytes = size.to_bytes(size_len, 'big')
            conn.send(size_bytes)
            conn.sendall(pixels)


def main(host='0.0.0.0', port=5000):
    sock = socket()
    sock.bind((host, port))
    try:
        sock.listen(5)
        print('Server started.')

        while 'connected':
            conn, addr = sock.accept()
            print('Client connected IP:', addr)
            thread = Thread(target=send_screenshot, args=(conn,))
            thread.start()
    finally:
        sock.close()


if __name__ == '__main__':
    main()
 

client.py

from socket import socket
from zlib import decompress
import cv2
import numpy
from PIL import Image

# 截圖大小
WIDTH = int(1366 / 1)
HEIGHT = int(768 / 1)


def recvall(conn, length):
    buf = b''
    while len(buf) < length:
        data = conn.recv(length - len(buf))
        if not data:
            return data
        buf += data
    return buf


# host為server的ip
def main(host='10.100.40.52', port=5000):
    watching = True

    sock = socket()
    sock.connect((host, port))
    try:
        while watching:
            size_len = int.from_bytes(sock.recv(1), byteorder='big')
            size = int.from_bytes(sock.recv(size_len), byteorder='big')
            # 解壓縮
            bgra = decompress(recvall(sock, size))
            img = Image.frombytes("RGB", (WIDTH, HEIGHT), bgra, "raw", "BGRX")
            np_ar = numpy.array(img, dtype=numpy.uint8)
            # 因為OpenCV模式色彩預設是BGR（紅色和藍色互換了）
            # 這裡就是把BGR改成RGB
            np_ar = numpy.flip(np_ar[:, :, :3], 2)
            cv2.imshow("OpenCV show", np_ar)

            if cv2.waitKey(25) & 0xFF == ord("q"):
                cv2.destroyAllWindows()
                break
    finally:
        sock.close()


if __name__ == '__main__':
    main()
 

截圖

程式碼同步到GITHUB

https://github.com/CrankZ/LAN-screen-sharing