""" Returns the version of the specified executable,
or False if the executable is not present """
try:
+ # STDIN should be redirected too. On UNIX-like systems, ffmpeg triggers
+ # SIGTTOU if youtube-dl is run in the background.
+ # See https://github.com/rg3/youtube-dl/issues/955#issuecomment-209789656
out, _ = subprocess.Popen(
[encodeArgument(exe)] + args,
stdin=subprocess.PIPE,