Fix #32: ffmpeg interference with stdin stream

README.rst

@@ -65,6 +65,10 @@ convert compressed audio files to WAV files.
 Version History
 ---------------
 
+2.1.4
+  Fix a bug in the FFmpeg backend where, after closing a file, the program's
+  standard input stream would be "broken" and wouldn't receive any input.
+
 2.1.3
   Avoid some warnings in the GStreamer backend when using modern versions of
   GLib. We now require at least GLib 2.32.

audioread/ffdec.py

@@ -21,6 +21,7 @@
 import re
 import threading
 import time
+import os
 try:
     import queue
 except ImportError:
@@ -117,10 +118,13 @@ def __init__(self, filename, block_size=4096):
             )
 
         try:
+            self.devnull = open(os.devnull)
             self.proc = popen_multiple(
                 COMMANDS,
                 ['-i', filename, '-f', 's16le', '-'],
-                stdout=subprocess.PIPE, stderr=subprocess.PIPE,
+                stdout=subprocess.PIPE,
+                stderr=subprocess.PIPE,
+                stdin=self.devnull,
             )
 
         except OSError:
@@ -258,6 +262,7 @@ def close(self):
         if hasattr(self, 'proc') and self.proc.returncode is None:
             self.proc.kill()
             self.proc.wait()
+            self.devnull.close()
 
     def __del__(self):
         self.close()

setup.py

@@ -22,7 +22,7 @@ def _read(fn):
 
 
 setup(name='audioread',
-      version='2.1.3',
+      version='2.1.4',
       description='multi-library, cross-platform audio decoding',
       author='Adrian Sampson',
       author_email='adrian@radbox.org',