从Python运行`sox.exe`

Question

I run this command from Windows cmd line successfully:

c:\\cygwin\\bin\\sox.exe -r 16000 -c 1 c:/work/out/in_fixed.s32 c:/work/out/out_float.f32

However, I fail to run it from Python:

import subprocess

if __name__ == "__main__":

    sox = 'c:/cygwin/bin/sox.exe'
    in_fixed = 'c:/work/out/in_fixed.s32'
    out_float = 'c:/work/out/out_fixed.f32'

    cmnd = '-r 16000 -c 1 ' + in_fixed + ' ' + out_float

    subprocess.call([sox, cmnd])

Ther error is:

/usr/bin/sox FAIL sox: Rate value ` 16000 -c 1 c:/work/out/in_fixed.s32 c:/work/out/out_fixed.f32' is not a positive number. 

How to launch this command from python properly?

Answer 1

Try separating your arguments

subprocess.call([sox, '-r', str(16000), '-c', str(1), in_fixed, out_float])

If that doesn't work, you can force CMD usage with shell=True .