如何利用python将视频转成字符画视频

​ 博主最近做了个跟科研无关的东西-视频转字符画视频，额，略显无聊哈。咱直接切入正题，这玩意到底咋实现呢？不急听我娓娓道来。其实很简单，将视频分解成一帧帧图片，再将图片转成字符图片，再将字符图片合成视频。对的，就是这样，下面放上博主写的源代码。这里多嘴一句哈，我觉得学习编程，理清思路是非常重要的，我的思路都反映在源码上了，这也是每次说一下思路就直接上菜的原因，我个人水平有限，相信大家都能看懂。啧啧啧，又开始话痨了。

import cv2
import numpy as np
import os
import threading
import re
from PIL import Image, ImageDraw, ImageFont
import time


class video_chr_figure():

    def __init__(self, video_adr):
        self.txt = ''
        self.video_adr = video_adr
        self.pix_weight = 0
        self.pix_height = 0
        print('即将载入的视频是%s' % re.search(r'(.*)\..*', video_adr).group(1))
        self.ascii_char = list("$@B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft/\\|()1{}[]?-_+~<>i!lI;:,\"^`'. ")
        self.chr_l = len(self.ascii_char)

    # 将视频转化为图片
    def video_fig(self):
        cap = cv2.VideoCapture(self.video_adr)
        i = 0
        try:
            while cap.isOpened():
                ret, frame = cap.read()
                fig_gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
                if not ret:
                    print('视频读取错误，请检查视频格式')
                    break
                self.pix_weight = int(np.size(np.array(fig_gray), 1) / 6)
                self.pix_height = int(np.size(np.array(fig_gray), 0) / 6)
                img = Image.fromarray(fig_gray)
                img.save('C:/Users/yplit/Documents/python projects/ceshi/' + 'img_' + str(i) + '.jpg')
                i += 1
        except:
            return i

# 将图片转化为字符画
    def fig_ch(self, num):

        img = cv2.imread('C:/Users/yplit/Documents/python projects/ceshi/' + 'img_' + str(num) + '.jpg', 0)
        im_g = cv2.resize(img, (self.pix_weight, self.pix_height), interpolation = cv2.INTER_AREA)
        print(self.pix_height, self.pix_weight)
        for k in range(self.pix_height):
            for j in range(self.pix_weight):
                pix_ch = self.ascii_char[int(im_g[k][j] / 256 * self.chr_l)]

                self.txt += pix_ch
            self.txt += '\r\n'
        # print(self.txt)
        im = Image.new('L', (self.pix_weight *3, self.pix_height*9), 255)
        dr = ImageDraw.Draw(im)
        font = ImageFont.truetype(os.path.join("fonts", "simsun.ttc"), 5)
        dr.text((0, 0), self.txt, font=font, fill="#000000")
        img = im.resize((self.pix_weight *6, self.pix_height*6))
        img.save('C:/Users/yplit/Documents/python projects/ceshi/' + 'img_' + str(num) + '.jpg')
        del dr
        im.close()

# 将字符画转变为视频
    def fig_vid(self, i):

        fps = 25
        size = (self.pix_weight * 6, self.pix_height * 6)
        videowriter = cv2.VideoWriter('C:/Users/yplit/Documents/python projects/ceshi/2/ceshi.avi',
                                      cv2.VideoWriter_fourcc('M', 'J', 'P','G'), fps, size)

        for k in range(i):
            frame = cv2.imread('C:/Users/yplit/Documents/python projects/ceshi/2/' + 'img_' + str(k) + '.jpg')
            videowriter.write(frame)
        videowriter.release()


if __name__ == '__main__':
    vcf = video_chr_figure('C:/Users/yplit/Documents/WeChat Files/wxid_vh6shev3b8lj22/FileStorage/Video/2020-08/ceshi.mp4')
    i = vcf.video_fig()
    a = []
    for num in range(207, i):
        t = threading.Thread(target=vcf.fig_ch, args=(num,))
        t.start()
        a.append(t)
        time.sleep(1)
    for t in a:
        t.join()
    vcf.fig_vid(i)

代码还可进一步优化，如果视频大并且电脑配置低的建议优化一下代码再运行，效果图如下。