python处理mp3音频文件:搜索静音(空白)时间

最近在做英语单词的lrc字幕文件时，有个需求：需要找出mp3中的静默起始时间,网上搜索了相关资料，搞了个python实现如下：

其中 detect_silence(sound,300,-35,1)中的两个参数300，-35分别对应搜索最小时间长度和静音阈值，需根据音频文件选取。

from pydub import AudioSegment
from pydub.silence import detect_silence
import re

sound = AudioSegment.from_file("P1.mp3", format="mp3")

start_end = detect_silence(sound,300,-35,1)

str1 = "\n".join('%s' %id for id in start_end)

str2 = re.findall(r" (.+?)]",str1)

str3 = "\n".join('%s' %id for id in str2)
str4 = []
idd = 0
for sss in str3.split():
    idd = int(sss) - idd
    m,ms = divmod(float(sss),60000)
    s,ms = divmod(float(ms),1000)
    ts="%02d:%02d.%03d" % (m,s,ms)
    if(idd>1100):
       str4.append(ts)
    idd = int(sss)

#print(str4)

str5 = "\n".join('[%s]' %id for id in str4)

with open('Q2lrc.txt', 'w') as f:
        f.write(str5)