> Read The Fine Manual:http://docs.python.org/library/subprocess.html#subprocess.Popen: snip... >> Try instead: > cmd3 = ['ffmpeg', '-i', '/home/giga/Desktop/Guitar1.flv'] >> Cheers, > Chris > --http://blog.rebertia.com No doubt, I should RTFM...you're right! Yes, works like a charm now. Thanks so much for the help. I really appreciate it!