[utils] Clarify for redirecting STDIN in get_exe_version()

This commit is contained in:
Yen Chi Hsuan 2016-10-22 13:04:05 +08:00
parent 00ca755231
commit b64d04c119
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@ -1818,6 +1818,9 @@ def get_exe_version(exe, args=['--version'],
""" 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,