Free learning recommendation: python video tutorial
First the effect, here’s the video:
Character dance:
Code dance
Source code:
video_2_code_video.py
import argparseimport osimport cv2import subprocessfrom cv2 import VideoWriter_fourccfrom PIL import Image, ImageFont, ImageDraw# 命令行输入参数处理# aparser = argparse.ArgumentParser()# aparser.add_argument('file')# aparser.add_argument('-o','--output')# aparser.add_argument('-f','--fps',type = float, default = 24)#帧# aparser.add_argument('-s','--save',type = bool, nargs='?', default = False, const = True)# 是否保留Cache文件，默认不保存class Video2CodeVideo:
def __init__(self):
self.config_dict = {
# 原视频文件
"input_file": "video/test.mp4",
# 中间文件存放目录
"cache_dir": "cache",
# 是否保留过程文件。True--保留，False--不保留
"save_cache_flag": False,
# 使用使用的字符集
"ascii_char_list": list("01B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft/\|()1{}[]?-_+~<>i!lI;:oa+>!:+. "),
}
# 第一步从函数，将像素转换为字符
# 调用栈：video_2_txt_jpg -> txt_2_image -> rgb_2_char
def rgb_2_char(self, r, g, b, alpha=256):
if alpha == 0:
return ''
length = len(self.config_dict["ascii_char_list"])
gray = int(0.2126 * r + 0.7152 * g + 0.0722 * b)
unit = (256.0 + 1) / length return self.config_dict["ascii_char_list"][int(gray / unit)]
# 第一步从函数，将txt转换为图片
# 调用栈：video_2_txt_jpg -> txt_2_image -> rgb_2_char
def txt_2_image(self, 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 += self.rgb_2_char(pixel[0], pixel[1], pixel[2], pixel[3])
else:
txt += self.rgb_2_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])
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 # self, xy, text, fill = None, font = None, anchor = None,
# *args, ** kwargs
dr.text((y, x), txt[i], fill=colors[i])
# dr.text((y, x), txt[i], font=font, fill=colors[i])
y += font_w
name = file_name # print(name + ' changed')
im_txt.save(name)
# 第一步，将原视频转成字符图片
# 调用栈：video_2_txt_jpg -> txt_2_image -> rgb_2_char
def video_2_txt_jpg(self, file_name):
vc = cv2.VideoCapture(file_name)
c = 1
if vc.isOpened():
r, frame = vc.read()
if not os.path.exists(self.config_dict["cache_dir"]):
os.mkdir(self.config_dict["cache_dir"])
os.chdir(self.config_dict["cache_dir"])
else:
r = False
while r:
cv2.imwrite(str(c) + '.jpg', frame)
self.txt_2_image(str(c) + '.jpg') # 同时转换为ascii图
r, frame = vc.read()
c += 1
os.chdir('..')
return vc # 第二步，将字符图片合成新视频
def txt_jpg_2_video(self, outfile_name, fps):
fourcc = VideoWriter_fourcc(*"MJPG")
images = os.listdir(self.config_dict["cache_dir"])
im = Image.open(self.config_dict["cache_dir"] + '/' + images[0])
vw = cv2.VideoWriter(outfile_name + '.avi', fourcc, fps, im.size)
os.chdir(self.config_dict["cache_dir"])
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()
# 第三步，从原视频中提取出背景音乐
def video_extract_mp3(self, file_name):
outfile_name = file_name.split('.')[0] + '.mp3'
subprocess.call('ffmpeg -i ' + file_name + ' -f mp3 -y ' + outfile_name, shell=True)
# 第四步，将背景音乐添加到新视频中
def video_add_mp3(self, file_name, mp3_file):
outfile_name = file_name.split('.')[0] + '-txt.mp4'
subprocess.call('ffmpeg -i ' + file_name + ' -i ' + mp3_file + ' -strict -2 -f mp4 -y ' + outfile_name, shell=True)
# 第五步，如果没配置保留则清除过程文件
def clean_cache_while_need(self):
# 为了清晰+代码比较短，直接写成内部函数
def remove_cache_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_cache_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
# 为了清晰+代码比较短，直接写成内部函数
def delete_middle_media_file():
os.remove(self.config_dict["input_file"].split('.')[0] + '.mp3')
os.remove(self.config_dict["input_file"].split('.')[0] + '.avi')
# 如果没配置保留则清除过程文件
if not self.config_dict["save_cache_flag"]:
remove_cache_dir(self.config_dict["cache_dir"])
delete_middle_media_file()
# 程序主要逻辑
def main_logic(self):
# 第一步，将原视频转成字符图片
vc = self.video_2_txt_jpg(self.config_dict["input_file"])
# 获取原视频帧率
fps = vc.get(cv2.CAP_PROP_FPS)
# print(fps)
vc.release()
# 第二步，将字符图片合成新视频
self.txt_jpg_2_video(self.config_dict["input_file"].split('.')[0], fps)
print(self.config_dict["input_file"], self.config_dict["input_file"].split('.')[0] + '.mp3')
# 第三步，从原视频中提取出背景音乐
self.video_extract_mp3(self.config_dict["input_file"])
# 第四步，将背景音乐添加到新视频中
self.video_add_mp3(self.config_dict["input_file"].split('.')[0] + '.avi', self.config_dict["input_file"].split('.')[0] + '.mp3')
# 第五步，如果没配置保留则清除过程文件
self.clean_cache_while_need()if __name__ == '__main__':
obj = Video2CodeVideo()
obj.main_logic()Running environment:
Operating system: win10
Version: Python 3.8.4
Dependent library: pip install opencv-python pillow
Installed with administrator rights, mine has been installed, the display is like this: 
Dependent application: ffpmeg (download and unzip directly, add the bin directory to the PATH environment variable)
Novice-style operation (big guys, please pretend to be blind):
Name the above source code video_2_code_video.py and create a new file in the same directory Clip video: 
Put the original video to be converted in the video and name it test.mp4: 
Open Python3.8
Run video_2_code_video.py, as shown below, it is running: 
will generate some intermediate files such as: 
After a long wait, finally Get what you want: 
test-txt.mp4 is the code dance you want: 
Lots of free learning recommendations, so please Visit python tutorial(video)
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