Python绘制1000响大地红鞭炮动态效果

def video2Pic(vp):
    number = 0
    if vp.isOpened():
        r,frame = vp.read()
        if not os.path.exists('cachePic'):
            os.mkdir('cachePic')
        os.chdir('cachePic')
    else:
        r = False
    while r:
        number += 1
        cv2.imwrite(str(number)+'.jpg',frame)
        r,frame = vp.read()
    os.chdir("..")
    return number

def color2Char(r,g,b,alpha = 256):
    imgChar= list("#RMNHQODBWGPZ*@$C&98?32I1>!:-;. ")
    if alpha:
      gray = int(0.2126 * r + 0.7152 * g + 0.0722 * b)
      unit = 256 / len(imgChar)
      return imgChar[int(gray / unit)]
    else:
      return ''

img = Image.open(imagePath).convert('RGB').resize((imgWidth, imgHeight),Image.NEAREST)
    for i in range(imgHeight):
        for j in range(imgWidth):
            pixel = img.getpixel((j, i))
            color.append((pixel[0],pixel[1],pixel[2]))
            txt = txt + color2Char(pixel[0], pixel[1], pixel[2], pixel[3]) if len(pixel) == 4 else \
                  txt + color2Char(pixel[0], pixel[1], pixel[2]) 
        txt += '\n'
        color.append((255,255,255))

def img2Video(vp, number, savePath):
    videoFourcc = VideoWriter_fourcc(*"MP42")  # 设置视频编码器
    asciiImgPathList = ['cacheChar' + r'/{}.jpg'.format(i) for i in range(1, number + 1)]
    asciiImgTemp = Image.open(asciiImgPathList[1]).size
    videoWritter= VideoWriter(savePath, videoFourcc, vp.get(cv2.CAP_PROP_FPS), asciiImgTemp)
    for imagePath in asciiImgPathList:
        videoWritter.write(cv2.imread(imagePath))
    videoWritter.release()

import cv2 
from PIL import Image,ImageFont,ImageDraw
import os
from cv2 import VideoWriter, VideoWriter_fourcc
'''
* @breif: 将像素颜色转换为ASCII字符
* @param[in]: 像素RGBA值
* @retval: 字符
'''
def color2Char(r,g,b,alpha = 256):
    imgChar = list("#RMNHQODBWGPZ*@$C&98?32I1>!:-;. ")
    if alpha:
      gray = int(0.2126 * r + 0.7152 * g + 0.0722 * b)
      unit = 256 / len(imgChar)
      return imgChar[int(gray / unit)]
    else:
      return ''
'''
* @breif: 将视频逐帧转换为图片
* @param[in]: vp -> openCV视频句柄
* @retval: number -> 转换的图片数
'''
def video2Pic(vp):
    number = 0
    if vp.isOpened():
        r,frame = vp.read()
        if not os.path.exists('cachePic'):
            os.mkdir('cachePic')
        os.chdir('cachePic')
    else:
        r = False
    while r:
        number += 1
        cv2.imwrite(str(number)+'.jpg',frame)
        r,frame = vp.read()
    os.chdir("..")
    return number
'''
* @breif: 将图片逐像素转换为ASCII字符
* @param[in]: imagePath -> 图片路径
* @param[in]: index -> 图片索引
* @retval: None
'''
def img2Char(imagePath, index):
    # 初始化
    txt, color, font = '', [], ImageFont.load_default().font
    imgWidth, imgHeight = Image.open(imagePath).size
    asciiImg = Image.new("RGB",(imgWidth, imgHeight), (255,255,255))
    drawPtr = ImageDraw.Draw(asciiImg)
    imgWidth, imgHeight = int(imgWidth / 6), int(imgHeight / 15)
    # 对图像帧逐像素转化为ASCII字符并记录RGB值
    img = Image.open(imagePath).convert('RGB').resize((imgWidth, imgHeight),Image.NEAREST)
    for i in range(imgHeight):
        for j in range(imgWidth):
            pixel = img.getpixel((j, i))
            color.append((pixel[0],pixel[1],pixel[2]))
            txt = txt + color2Char(pixel[0], pixel[1], pixel[2], pixel[3]) if len(pixel) == 4 else \
                  txt + color2Char(pixel[0], pixel[1], pixel[2]) 
        txt += '\n'
        color.append((255,255,255))
    # 绘制ASCII字符画并保存
    x, y = 0,0
    fontW, fontH = font.getsize(txt[1])
    fontH *= 1.37
    for i in range(len(txt)):
        if(txt[i]=='\n'):
            x += fontH
            y = -fontW
        drawPtr.text((y,x), txt[i], fill=color[i])
        y += fontW
    os.chdir('cacheChar')
    asciiImg.save(str(index)+'.jpg')
    os.chdir("..")
'''
* @breif: 将视频转换为ASCII图像集
* @param[in]: number -> 帧数
* @retval: None
''' 
def video2Char(number):
    if not os.path.exists('cacheChar'):
        os.mkdir('cacheChar')
    img_path_list = ['cachePic' + r'/{}.jpg'.format(i) for i in range(1, number + 1)] 
    task = 0
    for imagePath in img_path_list:
        task += 1
        img2Char(imagePath, task)
'''
* @breif: 将图像合成视频
* @param[in]: vp -> openCV视频句柄
* @param[in]: number -> 帧数
* @param[in]: savePath -> 视频保存路径
* @retval: None
'''  
def img2Video(vp, number, savePath):
    videoFourcc = VideoWriter_fourcc(*"MP42")  # 设置视频编码器
    asciiImgPathList = ['cacheChar' + r'/{}.jpg'.format(i) for i in range(1, number + 1)]
    asciiImgTemp = Image.open(asciiImgPathList[1]).size
    videoWritter= VideoWriter(savePath, videoFourcc, vp.get(cv2.CAP_PROP_FPS), asciiImgTemp)
    for imagePath in asciiImgPathList:
        videoWritter.write(cv2.imread(imagePath))
    videoWritter.release()
if __name__ == '__main__': 
  videoPath = 'test.mp4'
  savePath = 'new.avi'
  vp = cv2.VideoCapture(videoPath)
  number = video2Pic(vp)
  video2Char(number)
  img2Video(vp, number, savePath)
  vp.release()