Redirect stderr to nul on windows

Author: alastair

src/AudioStreamInput.h

@@ -14,6 +14,9 @@
 #include "File.h"
 #if defined(_WIN32) && !defined(__MINGW32__)
 #define snprintf _snprintf
+#define DEVNULL "nul"
+#else
+#define DEVNULL "/dev/null"
 #endif
 
 class AudioStreamInput {
@@ -59,11 +62,11 @@ class FfmpegStreamInput : public AudioStreamInput {
         // TODO: Windows
         char message[4096] = {0};
         if (_Offset_s == 0 && _Seconds == 0)
-            snprintf(message, NELEM(message), "ffmpeg -i \"%s\"  -ac %d -ar %d -f s16le - 2>/dev/null",
-                    filename, Params::AudioStreamInput::Channels, (uint) Params::AudioStreamInput::SamplingRate);
+            snprintf(message, NELEM(message), "ffmpeg -i \"%s\"  -ac %d -ar %d -f s16le - 2>%s",
+                    filename, Params::AudioStreamInput::Channels, (uint) Params::AudioStreamInput::SamplingRate, DEVNULL);
         else
-            snprintf(message, NELEM(message), "ffmpeg -i \"%s\"  -ac %d -ar %d -f s16le -t %d -ss %d - 2>/dev/null",
-                    filename, Params::AudioStreamInput::Channels, (uint) Params::AudioStreamInput::SamplingRate, _Seconds, _Offset_s);
+            snprintf(message, NELEM(message), "ffmpeg -i \"%s\"  -ac %d -ar %d -f s16le -t %d -ss %d - 2>%s",
+                    filename, Params::AudioStreamInput::Channels, (uint) Params::AudioStreamInput::SamplingRate, _Seconds, _Offset_s, DEVNULL);
 
         return std::string(message);
     }