diff --git a/src/global.cpp b/src/global.cpp
index 3091ee6..8aebb58 100644
--- a/src/global.cpp
+++ b/src/global.cpp
@@ -1448,23 +1448,30 @@ bool x264_suspendProcess(const QProcess *proc, const bool suspend)
 /*
  * Convert path to short/ANSI path
  */
-QString x264_path2ansi(const QString &longPath)
+QString x264_path2ansi(const QString &longPath, bool makeLowercase)
 {
 	QString shortPath = longPath;
 	
-	DWORD buffSize = GetShortPathNameW(reinterpret_cast<const wchar_t*>(longPath.utf16()), NULL, NULL);
+	const QString longPathNative = QDir::toNativeSeparators(longPath);
+	DWORD buffSize = GetShortPathNameW(QWCHAR(longPathNative), NULL, NULL);
 	
 	if(buffSize > 0)
 	{
-		wchar_t *buffer = new wchar_t[buffSize];
-		DWORD result = GetShortPathNameW(reinterpret_cast<const wchar_t*>(longPath.utf16()), buffer, buffSize);
+		wchar_t *buffer = (wchar_t*) _malloca(sizeof(wchar_t) * buffSize);
+		DWORD result = GetShortPathNameW(QWCHAR(longPathNative), buffer, buffSize);
 
 		if((result > 0) && (result < buffSize))
 		{
-			shortPath = QString::fromUtf16(reinterpret_cast<const unsigned short*>(buffer), result);
+			shortPath = QDir::fromNativeSeparators(QString::fromUtf16(reinterpret_cast<const unsigned short*>(buffer), result));
+
+			if(makeLowercase)
+			{
+				QFileInfo info(shortPath);
+				shortPath = QString("%1/%2").arg(info.absolutePath(), info.fileName().toLower());
+			}
 		}
 
-		delete[] buffer;
+		_freea(buffer);
 		buffer = NULL;
 	}
 
diff --git a/src/global.h b/src/global.h
index f0786f0..6c477e8 100644
--- a/src/global.h
+++ b/src/global.h
@@ -116,7 +116,7 @@ bool x264_init_qt(int argc, char* argv[]);
 bool x264_is_executable(const QString &path);
 bool x264_is_prerelease(void);
 void x264_message_handler(QtMsgType type, const char *msg);
-QString x264_path2ansi(const QString &longPath);
+QString x264_path2ansi(const QString &longPath, bool makeLowercase = false);
 bool x264_play_sound(const unsigned short uiSoundIdx, const bool bAsync, const wchar_t *alias = NULL);
 bool x264_portable(void);
 unsigned int x264_process_id(void);
diff --git a/src/thread_encode.cpp b/src/thread_encode.cpp
index 0c6ba4e..6b967ef 100644
--- a/src/thread_encode.cpp
+++ b/src/thread_encode.cpp
@@ -364,7 +364,7 @@ bool EncodeThread::runEncodingPass(bool x264_x64, bool x264_10bit, bool avs2yuv_
 			{
 				cmdLine_Input.append(splitParams(m_options->customAvs2YUV()));
 			}
-			cmdLine_Input << x264_path2ansi(QDir::toNativeSeparators(m_sourceFileName));
+			cmdLine_Input << QDir::toNativeSeparators(x264_path2ansi(m_sourceFileName, true));
 			cmdLine_Input << "-";
 			log("Creating Avisynth process:");
 			if(!startProcess(processInput, AVS2_BINARY(m_binDir, avs2yuv_x64), cmdLine_Input, false))
@@ -373,7 +373,7 @@ bool EncodeThread::runEncodingPass(bool x264_x64, bool x264_10bit, bool avs2yuv_
 			}
 			break;
 		case INPUT_VAPOUR:
-			cmdLine_Input << x264_path2ansi(QDir::toNativeSeparators(m_sourceFileName));
+			cmdLine_Input << QDir::toNativeSeparators(x264_path2ansi(m_sourceFileName, true));
 			cmdLine_Input << "-" << "-y4m";
 			log("Creating Vapoursynth process:");
 			if(!startProcess(processInput, VPSP_BINARY(m_vpsDir), cmdLine_Input, false))
@@ -990,7 +990,7 @@ bool EncodeThread::checkPropertiesAvisynth(bool x64, unsigned int &frames)
 	}
 
 	cmdLine << "-frames" << "1";
-	cmdLine << x264_path2ansi(QDir::toNativeSeparators(m_sourceFileName)) << "NUL";
+	cmdLine << QDir::toNativeSeparators(x264_path2ansi(m_sourceFileName, true)) << "NUL";
 
 	log("Creating process:");
 	if(!startProcess(process, AVS2_BINARY(m_binDir, x64), cmdLine))
@@ -1150,7 +1150,7 @@ bool EncodeThread::checkPropertiesVapoursynth(/*const QString &vspipePath,*/ uns
 	QProcess process;
 	QStringList cmdLine;
 
-	cmdLine << x264_path2ansi(QDir::toNativeSeparators(m_sourceFileName));
+	cmdLine << QDir::toNativeSeparators(x264_path2ansi(m_sourceFileName, true));
 	cmdLine << "-" << "-info";
 
 	log("Creating process:");
diff --git a/src/version.h b/src/version.h
index 28afd21..62bd77c 100644
--- a/src/version.h
+++ b/src/version.h
@@ -26,7 +26,7 @@
 #define VER_X264_MAJOR 2
 #define VER_X264_MINOR 2
 #define VER_X264_PATCH 5
-#define VER_X264_BUILD 610
+#define VER_X264_BUILD 612
 
 #define VER_X264_MINIMUM_REV 2363
 #define VER_X264_CURRENT_API 140