如何从python传递命令到应用程序 [英] How to pass commands to an application from python

问题描述

我试图从python运行ffmpeg应用程序。我使用以下代码执行应用程序

I am trying to run ffmpeg application from python.I am using the following code to execute the application

import subprocess

subprocess.call（['C：/ffmpeg/bin/ffmpeg.exe']）

import subprocess
subprocess.call(['C:/ffmpeg/bin/ffmpeg.exe'])

应用程序正在执行。可以有人告诉我如何传递命令到应用程序，我尝试

by this command the application is getting executed. could somebody tell me how can i pass commands to the application, i tried

subprocess.call（['C：/ ffmpeg / bin / ffmpeg.exe'，'ffmpeg -i 2.mp4 -vn -ab 128 outputaudio.mp3']）

subprocess.call(['C:/ffmpeg/bin/ffmpeg.exe','ffmpeg -i 2.mp4 -vn -ab 128 outputaudio.mp3'])

。

推荐答案

它们需要是单独的参数：

They need to be individual args:

subprocess.check_call(['C:/ffmpeg/bin/ffmpeg.exe','ffmpeg','-i',"2.mp4","-vn", "-ab", "128", "outputaudio.mp3"])

也可以使用 check_call 而不是调用， check_call 将引发CalledProcessError，如果命令返回非零退出状态。
我不确定'ffmpeg'应该在那里。

Also use check_call instead of call, check_call will raise a CalledProcessError if the command returns a non-zero exit status. I am not sure the 'ffmpeg' should be there.

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