On Tue, 19 Apr 2011 00:07:46 +0100, goldtech <goldt...@worldpost.com>
wrote:
Trying to learn how to run a linux command and get the stdout and
stderr. I'm trying the following:
cmd3 = r'ffmpeg -i /home/giga/Desktop/Guitar1.flv'
p = Popen(cmd3, stdout=PIPE, stderr=PIPE)
Traceback (most recent call last):
File "<pyshell#73>", line 1, in <module>
p = Popen(cmd3, stdout=PIPE, stderr=PIPE)
File "/usr/lib/python2.6/subprocess.py", line 623, in __init__
errread, errwrite)
File "/usr/lib/python2.6/subprocess.py", line 1141, in
_execute_child
raise child_exception
OSError: [Errno 2] No such file or directory
This is something that catches everyone! From the Fine Manual
(http://docs.python.org/library/subprocess.html#using-the-subprocess-module):
On Unix, with shell=False (default): In this case, the Popen class
uses os.execvp() to execute the child program. args should normally
be a sequence. If a string is specified for args, it will be used
as the name or path of the program to execute; this will only work
if the program is being given no arguments.
What you actually want is more like:
p = Popen(('ffmpeg', '-i', '/home/giga/Desktop/Guitar1.flv'),
stdout=PIPE, stderr=PIPE)
The manual gives you an example of using shlex to split a string
into tokens if you'd rather do it that way.
--
Rhodri James *-* Wildebeest Herder to the Masses
--
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