python调用ffmpeg批量转换音频flac、mp3、m4a

ffmpeg 使用说明

查看使用说明：ffmpeg -h。

# usage: 
ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

# options:
-ab:   -ab bitrate         audio bitrate (please use -b:a)
-y:    overwrite output files

转换命令如下：

ffmpeg -i xxx.flac -ab 320k xxx.mp3 -y'

这次我们用到的主要是 -ab 命令，用来指定音频转换的比特率，常见的有: 192K， 320K 等。

遍历文件夹中的所有音频文件, 将 flac 转为 mp3 或 m4a

import os
import subprocess

path = '~/music/FLAC/'

str = 'ffmpeg -i "{}" -ab 320k "{}" -y'

for parent, dirnames, filenames in os.walk(path):
    for filename in filenames:
        old_dir = os.path.join(parent, filename)
        if old_dir[-4:] == 'flac':
            new_dir = old_dir.replace('.flac', '.mp3')
            new_dir = old_dir.replace('.flac', '.m4a')
            str_cmd = str.format(old_dir, new_dir)
            print(str_cmd)

            p = subprocess.Popen(str_cmd, shell=True, stdout=subprocess.PIPE)
            for line in iter(p.stdout.readline, b''):
                print(line.strip().decode('gbk'))

删除原有的 flac 文件

import os
import subprocess

path = '~/music/FLAC/'

for parent, dirnames, filenames in os.walk(path):
    for filename in filenames:
        old_dir = os.path.join(parent, filename)

        if old_dir[-4:] == 'flac':
            print(old_dir)
            os.remove(old_dir)