os错误.系统在python脚本

Question

我正在创建一个python脚本，将使用ffmpeg和unoconv转换文件。但是，当我运行该程序时，程序并没有得到转换后的文件，而是简单地显示文本:

sh: 1: unoconv -f: not found

下面是我的程序脚本:

    path = raw_input("Please drag and drop the directory in which the file is stored into the terminal:")
    os.chdir(path[1:-2])
    filename = raw_input("Please enter the name of the file you would like to convert, including the file-type. e.g. test.txt, however please do make sure that the file-name does not have any spaces:")
    Fileextension = raw_input("What filetype would you like the program to convert your file to. E.g. .mp3: ")
    body, ext = os.path.splitext("filename")
    os.system("'ffmpeg -i ' + filename + body + Fileextension ")

你知道为什么会这样吗?

Answer 1

看看你的命令:

os.system("'ffmpeg -i ' + filename + body + Fileextension ")

你尝试执行这个字符串。

试题:

os.system('ffmpeg -i ' + filename + body + Fileextension)

同时，建议使用subprocess代替os.system

Answer 2

您应该使用子流程模块，特别是子流程。Check_call传递参数列表:

from subprocess import check_call
check_call(["ffmpeg" ,"-i",filename + body + Fileextension])

任何非零退出码都会引发CalledProcessError