如何利用Python实现字幕挂载

# 使用RealizeAddSubtitles类的方法
from core.RealizeAddSubtitles import RealizeAddSubtitles

if __name__ == '__main__':
 '''调用方法示例'''
 addSubtitles = RealizeAddSubtitles('d:/python/DownLoadVideo/Fong.mp4', 'd:/python/DownLoadVideo/Love.txt')

from os.path import splitext, isfile

from moviepy.editor import (VideoFileClip,
       TextClip,
       CompositeVideoClip)


class RealizeAddSubtitles():
 '''
 合成字幕与视频
 '''
 def __init__(self, videoFile, txtFile):
  self.src_video = videoFile
  self.sentences = txtFile
  # src_video = input('请输入视频文件路径')
  # sentences = input('请输入字幕文件路径')
  if not (isfile(self.src_video) and self.src_video.endswith(('.avi', '.mp4')) and isfile(
    self.sentences) and self.sentences.endswith(
    '.txt')):
   print('视频仅支持avi以及mp4，字幕仅支持txt格式')
  else:
   video = VideoFileClip(self.src_video)
   # 获取视频的宽度和高度
   w, h = video.w, video.h
   # 所有字幕剪辑
   txts = []
   with open(self.sentences, encoding='utf-8') as fp:
    for line in fp:
     sentences, start, span = line.split(': ')
     start, span = map(float, (start, span))
     txt = (TextClip(sentences, fontsize=40,
         font='SimHei', size=(w - 20, 40),
         align='center', color='white')
       .set_position((10, h - 150))
       .set_duration(span).set_start(start))
     txts.append(txt)
   # 合成视频，写入文件
   video = CompositeVideoClip([video, *txts])
   fn, ext = splitext(self.src_video)
   video.write_videofile(f'{fn}_带字幕{ext}')