Getting the dimensions of a video file in Python

There might be a better way to do this, but in a pinch, it works, as long as you have ffmpeg installed:

import subprocess, re
pattern = re.compile(r'Stream.*Video.*([0-9]{3,})x([0-9]{3,})')

def get_size(pathtovideo):
    p = subprocess.Popen(['ffmpeg', '-i', pathtovideo],
                         stdout=subprocess.PIPE,
                         stderr=subprocess.PIPE)
    stdout, stderr = p.communicate()
    match = pattern.search(stderr)
    if match:
        x, y = map(int, match.groups()[0:1])
    else:
        x = y = 0
    return x, y

Remember it's stderr, not stdout, because ffmpeg fails if you don't provide an output file. We don't really care, though, because it still prints out the stats of the infile.