分类： 树莓派
light led
import RPi.GPIO as GPIO #导入树莓派提供的python模块
import time #导入时间包，用于控制闪烁
GPIO.setmode(GPIO.BCM) #设置GPIO模式，BCM模式在所有数码派通用
GPIO.setup(26, GPIO.OUT) #设置GPIO18为电流输出
while True:
GPIO.output(26, GPIO.HIGH) #GPIO18 输出3.3V
time.sleep(1) #程序控制流程睡眠0.05秒
GPIO.output(26, GPIO.LOW) #GPIO18 输出0V
time.sleep(1) #程序控制流程睡眠0.05秒npn switcher
0603switcher
城市之角
密码保护：利用expect和rsync以及python实现免密码输入实现自动远程备份
利用python将延时摄像图片自动合成为短视频
利用python实现延时摄像图片的视频化，也就是将图片合成为视频：
import cv2
import glob
def resize(img_array, align_mode):
_height = len(img_array[0])
_width = len(img_array[0][0])
for i in range(1, len(img_array)):
img = img_array[i]
height = len(img)
width = len(img[0])
if align_mode == 'smallest':
if height < _height:
_height = height
if width < _width:
_width = width
else:
if height > _height:
_height = height
if width > _width:
_width = width
for i in range(0, len(img_array)):
img1 = cv2.resize(img_array[i], (_width, _height), interpolation=cv2.INTER_CUBIC)
img_array[i] = img1
return img_array, (_width, _height)
def images_to_video(path):
img_array = []
for filename in glob.glob(path+'/*.jpg'):
img = cv2.imread(filename)
if img is None:
print(filename + " is error!")
continue
img_array.append(img)
# 图片的大小需要一致
img_array, size = resize(img_array, 'largest')
fps = 5
out = cv2.VideoWriter('/Users/Downloads/中转文件夹/2022-02-20-03.jpg/demo.avi', cv2.VideoWriter_fourcc(*'DIVX'), fps, size)
for i in range(len(img_array)):
out.write(img_array[i])
out.release()
def main():
path = "/Users/Downloads/中转文件夹/2022-02-20-03.jpg/"
images_to_video(path)
if __name__ == "__main__":
main()
以上代码可能会重复将jpg文件编入视频，改进如下：
import cv2
import glob
import re
def resize(img_array, align_mode):
_height = len(img_array[0])
_width = len(img_array[0][0])
for i in range(1, len(img_array)):
img = img_array[i]
height = len(img)
width = len(img[0])
if align_mode == 'smallest':
if height < _height:
_height = height
if width < _width:
_width = width
else:
if height > _height:
_height = height
if width > _width:
_width = width
for i in range(0, len(img_array)):
img1 = cv2.resize(img_array[i], (_width, _height), interpolation=cv2.INTER_CUBIC)
img_array[i] = img1
return img_array, (_width, _height)
def images_to_video(path):
img_array = []
jpgfile=glob.glob(path+'/*.jpg')
ordjpgfile=sorted(jpgfile,key = str .lower)
for filename in ordjpgfile:
img = cv2.imread(filename)
if img is None:
print(filename + " is error!")
continue
img_array.append(img)
# 图片的大小需要一致
img_array, size = resize(img_array, 'largest')
fps = 10
out = cv2.VideoWriter('/Users/Downloads/2022/demo.avi', cv2.VideoWriter_fourcc(*'DIVX'), fps, size)
for i in range(len(img_array)):
out.write(img_array[i])
out.release()
def main():
path = "/Users/Downloads/2022/"
images_to_video(path)
if __name__ == "__main__":
main()自动根据时间生成文件名
import cv2
import glob
import re
def resize(img_array, align_mode):
_height = len(img_array[0])
_width = len(img_array[0][0])
for i in range(1, len(img_array)):
img = img_array[i]
height = len(img)
width = len(img[0])
if align_mode == 'smallest':
if height < _height:
_height = height
if width < _width:
_width = width
else:
if height > _height:
_height = height
if width > _width:
_width = width
for i in range(0, len(img_array)):
img1 = cv2.resize(img_array[i], (_width, _height), interpolation=cv2.INTER_CUBIC)
img_array[i] = img1
return img_array, (_width, _height)
def images_to_video(path):
img_array = []
jpgfile=glob.glob(path+'/*.jpg')
ordjpgfile=sorted(jpgfile,key = str .lower)
for filename in ordjpgfile:
img = cv2.imread(filename)
if img is None:
print(filename + " is error!")
continue
img_array.append(img)
aviname=str(ordjpgfile[0])[-23:-13]+'.avi'
print(aviname)
# 图片的大小需要一致
img_array, size = resize(img_array, 'largest')
fps = 10
out = cv2.VideoWriter('/home/peter/2022/'+aviname, cv2.VideoWriter_fourcc(*'DIVX'), fps, size)
for i in range(len(img_array)):
out.write(img_array[i])
out.release()
def main():
path = "/home/peter/2022"
images_to_video(path)
if __name__ == "__main__":
main()
利用rsync远程同步文件
解决已存在文件等复杂问题
rsync [email protected]:/home/pi/2022/2022-03-31/ /home/peter/下载/2022/2022-03-31
对于非22端口，则需重新指定端口才能同步
rsync -aP "-e ssh -p 20123" [email protected]:/home/pi/ /Users/Downloads/如果需要复制特定文件组，也就是需要增加“*”等通配符，此时需要将“”才能正常同步，如下：
rsync -aP "-e ssh -p 20123" "[email protected]:/home/pi/2022-03-31*" /Users/Downloads/网站备份
rsync -aP [email protected]:/var/www/ /Users/Downloads/roown.com/需求：公司有两台备份服务器，一主一从，每天晚上8点开始从服务器就开始同步主服务上的一些数据，但是rsync总会断开连接，尝试了好多方法都没有用，写了个脚本临时解决这个问题，如下
#!/bin/bash
rsync -avzP --timeout=60 -e "ssh -p X" X.X.X.X:/kejiandata/streams/tarena/streams/* /h
zdata/streams/
while ((1 < 100));do
ps aux | grep /kejiandata/streams/tarena/ | grep rsync | grep timeout
if [ `echo $?` -eq 1 ];then
rsync -avzP --timeout=60 -e "ssh -p X" X.X.X.X:/kejiandata/streams/tarena/stre
ams/* /hzdata/streams/
fi
sleep 30
if [ `date +"%H%M"` -ge 0830 ];then
exit
fi
done
shell脚本批量生成目录
需要在Linux环境中定期批量生成年月日的日期目录，这样，相关的文件可以按照日期类别放到对应的目录中
脚本如下所示：
#!/bin/bash
images_path="/usr/local/images"
TDATE=$(date -d next-day +%Y-%m-%d)
Next_DATE=$(date -d next-month +%Y-%m-%d)
i=0
until [[ $day == $Next_DATE ]]
do
day=$(date -d "$TDATE $i days" +%Y-%m-%d)
mkdir -p ${images_path}/$(date +"%Y")/$day/
((i++))
done如果想指定创建日期目录可以如下所示：
创建2018-01-01到2018-02-15的日期目录：
#!/bin/bash
images_path=/wxdk_images
i=0
until [[ $day == "2018-02-15" ]]
do
day=$(date -d "2018-01-01 $i days" +%Y-%m-%d)
mkdir -p ${images_path}/$(date +"%Y")/$day/
((i++))
done