關於vtt 與 srt 字幕 的相互轉換

我在下載的udacity中教程時,字幕和視頻是分離的,對於英文還無法完全聽懂的我來說,字幕還是比較重要.不想看解釋的可直接跳到最后復制代碼運行即可.

 

查看了vtt和srt的區別,使用記事本打開vtt和srt,發現主要有兩個

 

1. 首行多了 WEBVTT\n\n 標識符
2. 標點格式區別,vtt內部的"."在srt中為","

流程圖:

 

 

基於python寫了一個簡單的腳本對其進行批量修改

 

• 1 引入依賴

1. 1. os獲取文件信息
   2. sys獲取命令行輸入args
   3. re對獲取的文件內容進行匹配或更換

import os
import sys
import re

• 2 定義主函數　

• if __name__ == '__main__':
      args = sys.argv
      print(args)
  
      if os.path.isdir(args[1]):
          file_list = get_file_name(args[1], ".vtt")
          for file in file_list:
              vtt2srt(file)
  
      elif os.path.isfile(args[1]):
          vtt2srt(args[1])
      else:
          print("arg[0] should be file name or dir")

   

• 3 定義獲取文件名稱函數get_file_name

• def get_file_name(dir, file_extension):
      f_list = os.listdir(dir)
  
      result_list = []
  
      for file_name in f_list:
          if os.path.splitext(file_name)[1] == file_extension:
              result_list.append(os.path.join(dir, file_name))
      return result_list

   

• 4 定義轉換邏輯

• def vtt2srt(file_name):
      content = open(file_name, "r", encoding="utf-8").read()
      # 刪除WEBVTT行
      
      content = re.sub("WEBVTT\n\n",'',content)
      # 替換“.”為“,”
      content = re.sub("(\d{2}:\d{2}:\d{2}).(\d{3})", lambda m: m.group(1) + ',' + m.group(2), content)
  
      output_file = os.path.splitext(file_name)[0] + '.srt'
      open(output_file, "w", encoding="utf-8").write(content)
  
  def srt2vtt(file_name):
      content = open(file_name, "r", encoding="utf-8").read()
      # 添加WEBVTT行
      
      content = "WEBVTT\n\n" + content
      # 替換“,”為“.”
      content = re.sub("(\d{2}:\d{2}:\d{2}),(\d{3})", lambda m: m.group(1) + '.' + m.group(2), content)
  
      output_file = os.path.splitext(file_name)[0] + '.vtt'
      open(output_file, "w", encoding="utf-8").write(content)

   

• 5 完整代碼

• import os
  import sys
  import re
  
  
  def get_file_name(dir, file_extension):
      f_list = os.listdir(dir)
  
      result_list = []
  
      for file_name in f_list:
          if os.path.splitext(file_name)[1] == file_extension:
              result_list.append(os.path.join(dir, file_name))
      return result_list
  
  
  def vtt2srt(file_name):
      content = open(file_name, "r", encoding="utf-8").read()
      # 刪除WEBVTT行
      
      content = re.sub("WEBVTT\n\n",'',content)
      # 替換“.”為“,”
      content = re.sub("(\d{2}:\d{2}:\d{2}).(\d{3})", lambda m: m.group(1) + ',' + m.group(2), content)
  
      output_file = os.path.splitext(file_name)[0] + '.srt'
      open(output_file, "w", encoding="utf-8").write(content)
  
  def srt2vtt(file_name):
      content = open(file_name, "r", encoding="utf-8").read()
      # 添加WEBVTT行
      
      content = "WEBVTT\n\n" + content
      # 替換“,”為“.”
      content = re.sub("(\d{2}:\d{2}:\d{2}),(\d{3})", lambda m: m.group(1) + '.' + m.group(2), content)
  
      output_file = os.path.splitext(file_name)[0] + '.vtt'
      open(output_file, "w", encoding="utf-8").write(content)
  
      
  if __name__ == '__main__':
      args = sys.argv
  
      if os.path.isdir(args[1]):
          file_list = get_file_name(args[1], ".vtt")
          for file in file_list:
              vtt2srt(file)
  
      elif os.path.isfile(args[1]):
          vtt2srt(args[1])
          print('done')
      else:
          print("arg[0] should be file name or dir")

  注意:

  • 1 為避免路徑錯誤,請使用文件夾的絕對路徑

  • 代碼基於python3.x