用 Python 把坤坤动起来

rgba(255, 255, 255) -> 0
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0 -> $
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brew install ffmpeg
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ffmpeg -i res/cxk-video.mov res/image_frames/%d.jpg
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pip3 install Pillow
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sudo python3 -m pip install --upgrade pip
sudo python3 -m pip install --upgrade Pillow
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from os import listdir
from os.path import isfile, join
image_frames_dir = 'res/image_frames'
txt_frames_dir = 'res/txt_frames'
def prepare(width, height):
    for file_name in listdir(image_frames_dir):
        print("正在处理 " + file_name)
        image_path = join(image_frames_dir, file_name) // 获取图片地址
        txt_path = join(txt_frames_dir, file_name.split('.')[0] + '.txt') // 获取 txt 文件地址
        if not isfile(image_path):
            continue
        image = Image.open(image_path) // 获取图片
        image = image.resize((width, height), Image.NEAREST)  # NEAREST 低质量图
        txt = to_string(image, width, height) // 生成字符文本
        with open(txt_path, 'w') as txt_file: // 保存字符文本
            txt_file.write(txt)
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ascii_char = list("$@B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft/\|()1{}[]?-_+~<>i!lI;:,\"^`'. ")
def get_char(r, g, b, alpha=256):
    if alpha == 0:
        return ' '
    length = len(ascii_char)
    gray = int(0.2126 * r + 0.7152 * g + 0.0722 * b) // 生成灰度值
    unit = (256.0 + 1) / length
    return ascii_char[int(gray / unit)] // 映射到字符
def to_string(image, width, height):
    txt = ""
    for h in range(height):
        for w in range(width):
            txt += get_char(*image.getpixel((w, h)))  # 获取 pixel 的颜色数值
        txt += '\n' # 记得最后要换行
    return txt
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import os
from time import sleep
def display(speed):
    def compare_file_name(file_name1, file_name2):
        index1 = int(file_name1.split('.')[0])
        index2 = int(file_name2.split('.')[0])
        return index1 - index2 # 以文件名来作对比
    # 获取所有 txt 文件，并排好序
    for file_name in sorted(listdir(txt_frames_dir), key=cmp_to_key(compare_file_name)):
        txt_path = join(txt_frames_dir, file_name)
        os.system('cat ' + txt_path) # cat 出来
        sleep(speed)
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from os import listdir
def is_ready():
    return len(listdir(txt_frames_dir)) != 0
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import glob
import os
def clear():
    files = glob.glob(join(txt_frames_dir, '*'))
    for f in files:
        os.remove(f)
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#!/usr/local/bin/python3
import argparse
from procedure import prepare, display, is_ready, clear
# 获取参数
def get_args():
    parser = argparse.ArgumentParser()
    parser.add_argument('command', type=str, default='run')
    parser.add_argument('--width', type=int, default=240)
    parser.add_argument('--height', type=int, default=100)
    parser.add_argument('--speed', type=float, default=0.02)
    return parser.parse_args()
if __name__ == '__main__':
    args = get_args()
    # 参数
    command = args.command
    width = args.width
    height = args.height
    speed = args.speed
    if command == 'clear':
        clear()
    if command == 'compile':
        prepare(width, height)
    if command == 'run':
        if not is_ready():
            print('运行 python3 main.py compile 来编译')
        else:
            display(speed) # 输出字符视频
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./main.py run --speed 0.02 # 控制速度，单位为 seconds，这里数值为默认值
./main.py run --width 240 --height 100 # 控制宽高，这里数值为默认值
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