Sacar imagenes de un video con ffmpeg

1. import commands
2. import os
4. def execute():
5.         cmd = ‘c:/ffmpeg/ffmpeg.exe -y -itsoffset -4 -i c:/input.mpg -vframes 1 -s 100×90 -f image2 c:/uploads/img_gen.jpg’
6.         #c = commands.getoutput(cmd) # linux
7.         c = os.system(self.cmd) #windows
8.         return c

Note