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

https://www.cnblogs.com/blogjun/articles/8251530.html

学习 linux shell脚本

长期以来一直是windows的忠实用户，但发现做嵌入式很难脱离linux，只能苦命学linux，最近被日期形式的文件名困扰，一直想实现通过日期形成抓拍图片文件名，磁盘满了自动按时间顺序清楚，也就是先进先出方式，终于通过shell的bash实现了这点。

#！/bin/bash
var1=$(date +'%Y-%m-%d')
var2=$(date +%Y%m%d)
var3=$[$var2-2]
echo $var1
echo $var2
echo $var3

参考https://www.cnblogs.com/wanng/p/14105935.html

#！/bin/bash
h="hello"
hw=${h}" world"
echo ${hw}
var1=$(date +'%Y-%m-%d')
var2=$(date +%Y%m%d)
var3=$[$var2-2]
var4=$[$var2+5]
var5="*"
echo $var1
echo $var2
echo $var3
echo $var4
var5=$(date +%d $date)
h1="*"
hw1=$var4${h1}
ls $hw1.jpg -l

向esp32、pico等单片机传输二进制文件

main.mpy_下载

对于一些特殊文件比如图片、二进制程序等等，无法通过thonny等开发环境传输到esp32、树莓派pico等单片机，但micropython官方提供了一种方案，具体如下：

在esp32中运行以下代码建立wifi热点并取esp32的ip地址

import network,time
wlan = network.WLAN(network.STA_IF) # 创建一个WLAN实例  create station interface
wlan.active(True)       # 激活实例 activate the interface
wlan.scan()             # 扫描WIFI  scan for access points
wlan.isconnected()      # 判断WIFI连接否, 返回布尔值  check if the station is connected to an AP
wlan.connect('HUAWEI-WULIAN', 'onlychina') # 连接WIFI  connect to an AP
wlan.config('mac')      # 获取实例的MAC地址 get the interface's MAC address
wlan.ifconfig()         # 获取实例的网络信息  get the interface's IP/netmask/gw/DNS addresses
ap = network.WLAN(network.AP_IF) # 创建一个AP实例 create access-point interface
ap.active(True)         # 激活实例 activate the interface
ap.config(max_clients=10) # 设定多少个客户端可以连接它 set how many clients can connect to the network
ap.config(essid='ESP-AP') #  配置实例的essid参数 set the ESSID of the access point
time.sleep(3)
import webrepl
webrepl.start()

输入

import webrepl_setup

配置好相关参数后，打开链接:http://micropython.org/webrepl/

(此时主机需要连接到热点：ESP-AP，或在同一无线局域网内使用webrepl分配的局域网地址)，此时就可以将相关文件传输给esp32了

sudo pip install esptool adafruit-ampy pyserial