使用ffmpeg生成抖音中的像素视频(视频转字符动画)

生成抖音中的像素视频(视频转字符动画)

以下还需要需要ffmpeg视频处理工具合成音频 安装ffmpeg |
ffmpeg基本用法

引用类
pip3.7 install numpy opencv-python Pillow

代码实现

# -*- coding:utf-8 -*-
import os, cv2, subprocess, argparse
from PIL import Image, ImageFont, ImageDraw

# pip3.7 install numpy opencv-python Pillow

# 命令行输入参数处理
parser = argparse.ArgumentParser()
parser.add_argument('file')
parser.add_argument('-o', '--output')
parser.add_argument('-f', '--fps', type=float, default=24)  # 帧
parser.add_argument('-s', '--save', type=bool, nargs='?', default=False, const=True)  # 是否保留Cache文件,默认不保存


# 获取参数
args = parser.parse_args()
INPUT = args.file
OUTPUT = args.output
FPS = args.fps
SAVE = args.save


# 像素对应ascii码
ascii_char = list("$@B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft/\|()1{}[]?-_+~<>i!lI;:oa+>!:+. ")
# ascii_char = list("MNHQ$OC67+>!:-. ")
# ascii_char = list("MNHQ$OC67)oa+>!:+. ")


# 将像素转换为ascii码
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)
    unit = (256.0 + 1) / length
    return ascii_char[int(gray / unit)]


# 将视频拆分成图片
def videoSplitJpg(file_name):
    vc = cv2.VideoCapture(file_name)
    c = 1
    if vc.isOpened():
        r, frame = vc.read()
        if not os.path.exists('Cache'):
            os.mkdir('Cache')
        os.chdir('Cache')
    else:
        r = False

    while r:
        cv2.imwrite(str(c) + '.jpg', frame)
        # 将txt转换为图片
        txtToImage(str(c) + '.jpg')
        r, frame = vc.read()
        c += 1

    os.chdir('..')
    return vc


# 将txt转换为图片(换为ascii图)
def txtToImage(file_name):
    im = Image.open(file_name).convert('RGB')
    # gif拆分后的图像,需要转换,否则报错,由于gif分割后保存的是索引颜色
    raw_width = im.width
    raw_height = im.height
    width = int(raw_width / 6)
    height = int(raw_height / 15)
    im = im.resize((width, height), Image.NEAREST)

    txt = ""
    colors = []
    for i in range(height):
        for j in range(width):
            pixel = im.getpixel((j, i))
            colors.append((pixel[0], pixel[1], pixel[2]))
            if (len(pixel) == 4):
                txt += get_char(pixel[0], pixel[1], pixel[2], pixel[3])
            else:
                txt += get_char(pixel[0], pixel[1], pixel[2])
        txt += '\n'
        colors.append((255, 255, 255))

    im_txt = Image.new("RGB", (raw_width, raw_height), (255, 255, 255))
    dr = ImageDraw.Draw(im_txt)
    # font = ImageFont.truetype(os.path.join("fonts","汉仪楷体简.ttf"),18)
    font = ImageFont.load_default().font

    x = y = 0
    # 获取字体的宽高
    font_w, font_h = font.getsize(txt[1]) or (6, 11)
    font_h *= 1.37  # 调整后更佳
    # ImageDraw为每个ascii码进行上色
    for i in range(len(txt)):
        if (txt[i] == '\n'):
            x += font_h
            y = -font_w
        dr.text((y, x), txt[i], fill=colors[i])
        y += font_w

    name = file_name
    print(name + ' changed')
    im_txt.save(name)


# 将图片合成视频
def jpgToVideo(outfile_name, fps):
    fourcc = cv2.VideoWriter_fourcc(*"MJPG")

    images = os.listdir('Cache')
    im = Image.open('Cache/' + images[0])
    vw = cv2.VideoWriter(outfile_name + '.avi', fourcc, fps, im.size)

    os.chdir('Cache')
    for image in range(len(images)):
        # Image.open(str(image)+'.jpg').convert("RGB").save(str(image)+'.jpg')
        frame = cv2.imread(str(image + 1) + '.jpg')
        vw.write(frame)
        print(str(image + 1) + '.jpg' + ' finished')
    os.chdir('..')
    vw.release()


# 调用ffmpeg获取mp3音频文件
def videoGetVoice(file_name, voice_file):
    # ffmpeg -i 'file_name' -vn -y -acodec copy 'voice_file'     获取视频中的音频文件
    subprocess.call('ffmpeg -i ' + file_name + ' -vn -y -acodec copy ' + voice_file, shell=True)


# 合成音频和视频文件
def video_add_mp3(file_name, voice_file):
    outfile_name = file_name.split('.')[0] + '-txt.mp4'
    # ffmpeg -i 'file_name' -i 'voice_file'  -strict -2 -f mp4  'outfile_name'   合并avi和aac音频生成mp4文件
    subprocess.call('ffmpeg -i ' + file_name + ' -i ' + voice_file + ' -strict -2 -f mp4 ' + outfile_name, shell=True)



# 递归删除目录
def remove_dir(path):
    if os.path.exists(path):
        if os.path.isdir(path):
            dirs = os.listdir(path)
            for d in dirs:
                if os.path.isdir(path + '/' + d):
                    remove_dir(path + '/' + d)
                elif os.path.isfile(path + '/' + d):
                    os.remove(path + '/' + d)
            os.rmdir(path)
            return
        elif os.path.isfile(path):
            os.remove(path)
        return

if __name__ == '__main__':
    # 将视频拆分成图片
    print('--------将视频拆分成图片------------------')
    vc = videoSplitJpg(INPUT)
    FPS = vc.get(cv2.CAP_PROP_FPS)  # 获取帧率
    vc.release()

    # 将图片合成视频
    print('--------将图片合成视频------------------')
    jpgToVideo(INPUT.split('.')[0], FPS)

    # 音频文件名
    voice_file = INPUT.split('.')[0] + '.aac'

    # 调用ffmpeg获取mp3音频文件
    print('--------调用ffmpeg获取mp3音频文件------------------')
    videoGetVoice(INPUT, voice_file)

    # 合成音频和视频文件
    print('--------合成音频和视频文件------------------')
    video_add_mp3(INPUT.split('.')[0] + '.avi', voice_file)

    if (not SAVE):
        print('--------删除生成的音频视频文件,和cache文件------------------')
        remove_dir("Cache")
        os.remove(voice_file)
        os.remove(INPUT.split('.')[0] + '.avi')
        print('--------删除成功------------------')
Last modification:September 19th, 2019 at 02:01 pm
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