月度归档： 2022 年 4 月

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

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()