使用Python中的ffmpeg即时将mp3转换为wav [英] Convert mp3 to wav on the fly using ffmpeg in Python

问题描述

我正在使用ffmpeg将Python中的MP3文件转换成wav文件。

I'm trying to convert a mp3 file on the fly in Python to wav file using ffmpeg.

我使用子进程调用它，我如何得到它的输出把它当作wav在飞行中没有保存它作为文件（或播放它，而它的转换）然后播放它？

I call it using subprocess, how can I get it's output to play it as wav on the fly wthout saving it as the file (or playing it while its converting) and then playing it?

这是我迄今为止所做的：

This is what I have so far:

我正在使用aplay举个例子。

I'm using aplay just for a example.

FileLocation = "/home/file.mp3"

subprocess.call(["ffmpeg", "-i", FileLocation etc etc "newfail.wav"])
os.system("aplay ... ") #play it on the fly here

据我所知，如果我把 - 作为文件名，它会输出到stdout，但是我不知道如何读取stdout。

As far as I understand, if I put "-" as file name, it will output it instead to stdout, but I don't know how to read stdout...

推荐答案

模拟 source arg1 arg2 | sink 没有shell的shell命令：

To emulate source arg1 arg2 | sink shell command without the shell:

from subprocess import Popen, PIPE

source = Popen(['source', 'arg1', 'arg2'], stdout=PIPE)
sink = Popen(['sink'], stdin=source.stdout)
source.stdout.close()
source.wait()
sink.wait()

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