sudo apt-get install libopencv-dev python3-opencv cat python3-opencv ——————————— import cv2 # 指定摄像头索引，0通常是内置摄像头，1是外接USB摄像头（如果有多个摄像头） cap = cv2.VideoCapture(2) # 检查摄像头是否成功打开 if not cap.isOpened(): print(“无法打开摄像头”) exit() # 捕获一帧图像 ret, frame = cap.read() # 如果帧被正确捕获，ret是True if ret: cv2.imwrite(‘captured_image.jpg’, frame) # 保存图像到文件 print(“图像已保存”) else: print(“无法捕获图像”) # 释放摄像头资源 cap.release() cv2.destroyAllWindows() ——————————— python3 python3-opencv
linux usb摄像头采集图像
sudo apt-get update sudo apt-get install v4l-utils root135@root135:~$ v4l2-ctl –list-devices Lenovo EasyCamera: Lenovo EasyC (usb-0000:00:14.0-4): /dev/video0 /dev/video1 /dev/media0 2K USB Camera: 2K USB Camera (usb-0000:00:1a.0-1.2.3): /dev/video2 /dev/video3 /dev/media1
php修改上传文件大小
在PHP中，可以通过修改配置文件或使用ini_set()函数来修改上传文件大小限制。 通过修改php.ini文件 找到php.ini文件，通常位于服务器的php安装目录下。 打开php.ini文件，找到”upload_max_filesize”和”post_max_size”两个配置项。 修改它们的值，例如将它们都设为”10M”，表示最大上传文件大小为10MB。 保存php.ini文件并重启服务器，使配置生效。 vim /usr/local/php/lib/php.ini ; Maximum allowed size for uploaded files. upload_max_filesize = 500M ; Maximum size of POST data that PHP will accept. post_max_size = 500M systemctl restart rc-local.service
mysql 远程端口3307
vim /etc/my.cnf [client] #password = your_password port = 3307 socket = /tmp/mysql.sock systemctl restart rc-local.service vim frpc.ini [mysql] type = tcp local_ip = 10.168.1.115 local_port = 3306 remote_port = 3307 custom_domains = 39.100.102.12 systemctl restart frpc.service root135@root135:~/Desktop$ mysql -u root -p -h 39.100.102.12 -P 3307 Enter password: Welcome to the MariaDB monitor. Commands end with… Continue reading mysql 远程端口3307
mysql update delete
mysql> update user set password=password(‘123456′) where user=’root’ and host=’root’ or host=’localhost’; Query OK, 2 rows affected (0.00 sec) Rows matched: 2 Changed: 2 Warnings: 0 mysql> flush privileges; Query OK, 0 rows affected (0.00 sec) mysql> update mysql.user set host=’10.168.1.115′ where user=’root’ and host=’localhost’; Query OK, 0 rows affected (0.00 sec) Rows matched: 0 Changed:… Continue reading mysql update delete