python subprocess store each line of output in a list

Question

I'm trying to store the dimensions of video files in a folder into a list.

#!/usr/bin/env python

# src_dimensions.py

# requires mediainfo package

import subprocess

proc = subprocess.Popen('mediainfo --Inform="Video;%Width%x%Height%\n" /home/saad/Videos/*.*', shell=True, stdout=subprocess.PIPE)

for line in iter(proc.stdout.readline,''):
   print line

The resulting output of this program is:

384x288640x480480x350352x162480x360640x360480x360384x288240x180320x240480x360384x288346x26

When I run the mediainfo command in the terminal, each video dimension is on a newline:

I want each dimension stored as a seperate item in a list. I'm trying to iterate over stdout but it doesn't work.

UPDATE #1

import subprocess
dim = []
proc = subprocess.Popen('mediainfo --Inform="Video;%Width%x%Height%\\n" /home/saad/Videos/*.*', shell=True, stdout=subprocess.PIPE)
for line in iter(proc.stdout.readline, ''):
   dim.append(line.rstrip('\n'))
print dim

This seems to give me the list, thanks to @Chakib's suggestion.

['440x360', '320x240', '480x360', '320x240', '480x360', '320x240', '320x240', '400x224', '']

works with \\n but output has an extra newline between items e.g. 340X480 \n 480X240 — koogee
– koogee, Commented Apr 3, 2013 at 13:40
How would I do it if my command looked like itemsListEXT = subprocess.check_output(cmd, shell=True,executable="/bin/bash").splitlines() return itemsListEXT — Jonathan Komar
– Jonathan Komar, Commented Aug 1, 2014 at 22:28
answered my own question. it is easy (just change splitlines() to split(): itemsListEXT = subprocess.check_output(cmd,shell=True,executable="/bin/bash").split() return itemsListEXT — Jonathan Komar
– Jonathan Komar, Commented Aug 1, 2014 at 23:14

Hal Canary · Accepted Answer · 2013-04-03 13:56:13Z

3

\Is this what you want?

#!/usr/bin/env python
# src_dimensions.py
# requires mediainfo package
import subprocess, glob
globpattern = 'path/to/*.*'
cmd = ['mediainfo', '--Inform=Video;%Width%x%Height%\\n']
cmd.extend(glob.glob(globpattern))
proc = subprocess.Popen(cmd,stdout=subprocess.PIPE)
outputlines = filter(lambda x:len(x)>0,(line.strip() for line in proc.stdout))
print outputlines

edited Apr 3, 2013 at 13:56

answered Apr 3, 2013 at 13:38

Hal Canary

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2 Comments

koogee Over a year ago

Returns: ['480x360480x350320x240384x288640x4801280x720450x360480x3601280x720']. I want ['480x360', '480x350'...]

Hal Canary Over a year ago

sounds like a problem in the cmdline arguments.

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