python获取音频的长度ffmpeg或ffprobe

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解决问题：获取音频长度，并生成固定的时间格式。

遇到问题

  • 需要获取将一段音频的长度，按照一定的格式进行输出。

    解决思路

  • 根据ffmpeg或ffrpobe进行音频长度获取
  • 根据时间参数进行格式化数据

安装插件

组织代码

  • 懒虫测试文件下,得到时间格式是00:00:20.000000
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    # -*- coding: utf-8 -*-
    import subprocess
    import json
    def main():
        mp3ss=getLenTime("03.wav")
        print(mp3ss)
        mp3ss,mp3ms=mp3ss.split(".")
        m, s = divmod(int(mp3ss), 60)
        h, m = divmod(m, 60)
        hmsms="%02d:%02d:%02d" % (h, m, s) + "." + mp3ms
        print (hmsms)

    def getLength(filename):
        command = ["ffprobe.exe","-loglevel","quiet","-print_format","json","-show_format","-show_streams","-i",filename]
        result = subprocess.Popen(command,shell=True,stdout = subprocess.PIPE, stderr = subprocess.STDOUT)
        out = result.stdout.read()
        #print(str(out))
        temp = str(out.decode('utf-8'))
        try:
            data = json.loads(temp)['streams'][1]['width']
        except:
            data = json.loads(temp)['streams'][0]['width']
        return data

    def getLenTime(filename):
        command = ["ffprobe.exe","-loglevel","quiet","-print_format","json","-show_format","-show_streams","-i",filename]
        result = subprocess.Popen(command,shell=True,stdout = subprocess.PIPE, stderr = subprocess.STDOUT)
        out = result.stdout.read()
        #print(str(out))
        temp = str(out.decode('utf-8'))
        data = json.loads(temp)["format"]['duration']
        return data
    if __name__ == '__main__':
        main()

运用python获取mp3音频时间长度函数

  • 函数如下，可以调用getMp3Len("03.wav"),得到的是0.000S`的格式
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    def getMp3Len(filename):
        #mp3时间长度
        #print('获取音频文件长度'+ filename)
        command = ["ffprobe.exe","-loglevel","quiet","-print_format","json","-show_format","-show_streams","-i",filename]
        result = subprocess.Popen(command,shell=True,stdout = subprocess.PIPE, stderr = subprocess.STDOUT)
        out = result.stdout.read()
        #print(str(out))
        temp = str(out.decode('utf-8'))
        data = json.loads(temp)["format"]['duration']
        return float(data)