python合并大量ts文件成mp4格式（ps：上限是450，亲测）

 import os
 #exec_str = r'copy /b  ts/c9645620628078.ts+ts/c9645620628079.ts  ts/1.ts'
 #os.system(exec_str)
 f = open('index.m3u8', 'r', encoding='utf-8')
 text_list = f.readlines()
 files = []
 for i in text_list:
     if i.find('#EX')==-1:
         files.append(i)

 f.close()

 tmp = []
 for file in files[0:450]:
     tmp.append(file.replace("\n",""))
     # 合并ts文件
 os.chdir("ts/")
 shell_str = '+'.join(tmp)
 #print(shell_str)
 shell_str = 'copy /b '+ shell_str + ' 5.mp4'

 os.system(shell_str)
 print(shell_str)