python如何实现视频转代码视频

Python  /  管理员 发布于 7年前   201

本文实例为大家分享了python如何实现视频转代码视频的具体代码，供大家参考，具体内容如下

# -*- coding:utf-8 -*-#coding:utf-8import argparseimport osimport cv2import subprocessfrom cv2 import VideoWriter, VideoWriter_fourcc, imread, resizefrom 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 # 获取参数# args = parser.parse_args()# INPUT = args.file# OUTPUT = args.output# SAVE = args.save# FPS = args.fps# 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txt转换为图片def txt2image(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])  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)  # 将视频拆分成图片def video2txt_jpg(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)    txt2image(str(c) + '.jpg') # 同时转换为ascii图    r, frame = vc.read()    c += 1  os.chdir('..')  return vc  # 将图片合成视频def jpg2video(outfile_name, fps):  fourcc = 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()  # 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  # 调用ffmpeg获取mp3音频文件def video2mp3(file_name):  outfile_name = file_name.split('.')[0] + '.mp3'  subprocess.call('ffmpeg -i ' + file_name + ' -f mp3 ' + outfile_name, shell=True)  # 合成音频和视频文件def video_add_mp3(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 ' + outfile_name, shell=True)  if __name__ == '__main__':  INPUT = r"G:\py\学习python\视频到代码\video39.mp4"  OUTPUT = r"G:\py\学习python\视频到代码\video39_2.mp4"  SAVE = r"G:\py\学习python\视频到代码\\video39_3"  FPS = "24"  vc = video2txt_jpg(INPUT)  FPS = vc.get(cv2.CAP_PROP_FPS) # 获取帧率  print(FPS)   vc.release()   jpg2video(INPUT.split('.')[0], FPS)  print(INPUT, INPUT.split('.')[0] + '.mp3')  video2mp3(INPUT)  video_add_mp3(INPUT.split('.')[0] + '.avi', INPUT.split('.')[0] + '.mp3')   if (not SAVE):    remove_dir("Cache")    os.remove(INPUT.split('.')[0] + '.mp3')    os.remove(INPUT.split('.')[0] + '.avi')

流程图：

这次python编程的流程图如下： 

注意事项：

在编程的过程中有需要注意的几点：

• 这次编程使用到了opencv库，需要安装
• 帧率的获取可以通过这个函数――FPS = vc.get(cv2.CAP_PROP_FPS)
• 合成后的视频是没有声音的,我们使用ffmpeg进行合成
  

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。