将下载的字幕里的语言部分的中文，替换成英文，避免部分盒子/播放器不能自动加载字幕。替换和被替换的字符串，须成对填写到replace里。

subtitle_rename.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

# 用法：
# python subtitle_rename.py [字幕所在目录] [要被替换的文件名] [替换之后的文件名]
# 备注：[字幕所在目录]：可选。会替换该目录下的所有srt和ass文件，如果为空则为当前目录
# [要被替换的文件名]：可选。如果需要替换文件名，则提供前缀部分文件名
# [替换之后的文件名]：可选，如果添加了 [要被替换的文件名]，则为必选。

# 示例：python subtitle_rename.py subs/The.Expanse.S03E01.1080p.WEB.H264-DEFLATE The.Expanse.S03E01.1080p.WEB.H264-DEFLATE Yellowstone.2018.S01E01.Daybreak.1080p.AMZN.WEB-DL.DDP2.0.H.264-NTb
# 把 subs/The.Expanse.S03E01.1080p.WEB.H264-DEFLATE 目录的
# The.Expanse.S03E01.1080p.WEB.H264-DEFLATE(.+)(srt|ass) 重命名为
# Yellowstone.2018.S01E01.Daybreak.1080p.AMZN.WEB-DL.DDP2.0.H.264-NTb(替换后的英文名称)$2

# current version: 1.0.3
# change: 
# 1.0.0: 替换后缀的语言，把中文替换成英文。因为部分设备不支持搜索含有中文后缀的字幕文件
# 1.0.3: 增加替换文件名的功能

from sys import argv
from os import path, rename, listdir

replace_word = [
    '简体中文', 'chs',
    '繁体中文', 'cht',
    '間體中文', 'chs',
    '繁體中文', 'cht',
    '简体', 'chs',
    '繁体', 'cht',
    '間體', 'chs',
    '繁體', 'cht',
    '中文', 'chs',
    '英文', 'eng',
    '英语', 'eng',
    'english', 'eng'
    ]
# 替换和被替换的字符串，须成对填写到replace_word里
length = int(len(replace_word) / 2) * 2


def sub_rename(filename, abs_path):
    filename_new = str(filename)
    for i in range(0, length, 2):
        filename_new = filename_new.replace(replace_word[i], replace_word[i + 1])
    if rename_mode is True and filename_new.startswith(name_org):
        filename_new = filename_new.replace(name_org, name_new)
    if filename != filename_new:
        print('Rename %s to %s.' % (filename, filename_new))
        rename(path.join(abs_path, filename), path.join(abs_path, filename_new))
    else:
        print('No need to rename %s.' % filename)


def replace_file(abs_path):
    file_list = listdir(abs_path)
    for f in file_list:
        if rename_mode is True:
            if f.startswith(name_org) and f.endswith(('.srt', '.ass')):
                sub_rename(f, abs_path)
            else:
                pass
        elif f.endswith(('.srt', '.ass')):
            sub_rename(f, abs_path)
        else:
            pass


if __name__ == '__main__':
    name_org, name_new = '', ''
    rename_mode = False
    if len(argv) <= 1:
        abs_path = path.abspath('.')
    elif len(argv) >= 4:
        abs_path = path.abspath(argv[1])
        name_org = argv[2]
        name_new = argv[3]
        rename_mode = name_org != name_new
    else:
        abs_path = path.abspath(argv[1])
    replace_file(abs_path)