diff -uNrp src/src/core/ffms.cpp src.new/src/core/ffms.cpp
--- src/src/core/ffms.cpp	2016-01-18 22:02:19 +0300
+++ src.new/src/core/ffms.cpp	2016-01-18 22:05:02 +0300
@@ -29,7 +29,6 @@ extern "C" {
 #include <libavutil/pixdesc.h>
 }
 
-#include <mutex>
 #include <sstream>
 #include <iomanip>
 
@@ -37,7 +36,6 @@ extern "C" {
 #	include <windows.h>
 #endif
 
-static std::once_flag FFmpegOnce;
 static bool FFmpegInited = false;
 
 #ifdef FFMS_WIN_DEBUG
@@ -77,7 +75,7 @@ void av_log_windebug_callback(void* ptr,
 #endif
 
 FFMS_API(void) FFMS_Init(int, int) {
-	std::call_once(FFmpegOnce, []() {
+       if (!FFmpegInited) {
 		av_register_all();
 		avformat_network_init();
 		RegisterCustomParsers();
@@ -88,7 +86,7 @@ FFMS_API(void) FFMS_Init(int, int) {
 		av_log_set_level(AV_LOG_QUIET);
 #endif
 		FFmpegInited = true;
-	});
+	}
 }
 
 FFMS_API(int) FFMS_GetVersion() {