使用python 2.7执行mplayer bash命令

Question

如何使用Python

执行以下linux命令行命令

mplayer -identify -frames 0 -vo null -nosound metallica.mp4 2>&1 | awk -F= '/LENGTH/{print $2}'

我试过

p1 = subprocess.Popen(["mplayer","-identify","-frames","0","-vo","null","-nosound","test1.mp4","2>&1"], stdout=subprocess.PIPE)
p2 = subprocess.Popen(["awk","-F","'/LENGTH/{print $2}'"], stdin=p1.stdout, stdout=subprocess.PIPE)
p2.communicate()

上面的

我收到以下错误

  

mplayer：无法连接到套接字mplayer：没有这样的文件或   目录无法打开LIRC支持。你将无法使用   你的遥控器。

请帮助

Answer 1

import subprocess

cmdline = "mplayer -identify -frames 0 -vo null -nosound metallica.mp4 2>&1 | awk -F= '/LENGTH/{print $2}'"
p1 = subprocess.Popen(cmdline, shell=True, stdout=subprocess.PIPE)
print(p1.communicate())