[README.md] Fix a typo

[youtube-dl] / youtube_dl / utils.py

diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index 04452003766130996feb47ed9826463bb5024cf4..2770c5f1c5ee55ea4708ce8cbfc3a0e249a2b23d 100644 (file)
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python
-# -*- coding: utf-8 -*-
+# coding: utf-8
 
 from __future__ import unicode_literals
 
@@ -165,6 +165,8 @@ DATE_FORMATS_MONTH_FIRST.extend([
     '%m/%d/%Y %H:%M:%S',
 ])
 
+PACKED_CODES_RE = r"}\('(.+)',(\d+),(\d+),'([^']+)'\.split\('\|'\)"
+
 
 def preferredencoding():
     """Get preferred encoding.
@@ -1816,8 +1818,12 @@ 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,
             stdout=subprocess.PIPE, stderr=subprocess.STDOUT).communicate()
     except OSError:
         return False
@@ -3017,9 +3023,7 @@ def encode_base_n(num, n, table=None):
 
 
 def decode_packed_codes(code):
-    mobj = re.search(
-        r"}\('(.+)',(\d+),(\d+),'([^']+)'\.split\('\|'\)",
-        code)
+    mobj = re.search(PACKED_CODES_RE, code)
     obfucasted_code, base, count, symbols = mobj.groups()
     base = int(base)
     count = int(count)