diff --git a/aconfigure b/aconfigure
index 0fa15238c..9dd490fa2 100755
--- a/aconfigure
+++ b/aconfigure
@@ -681,6 +681,9 @@ ac_darwin_cflags
 ac_pjmedia_video_has_ios_opengl
 ac_pjmedia_video_has_vtoolbox
 ac_pjmedia_video_has_darwin
+ac_dshow_ldflags
+ac_dshow_cflags
+ac_pjmedia_video_dev_has_dshow
 ac_android_cflags
 ac_pjmedia_video_has_android
 ac_pjmedia_video
@@ -6481,10 +6484,12 @@ fi
 
 
 
-# Disable video on mingw
+# Disable video on mingw by default (but respect --enable-video=yes)
 case $target in
  *mingw*)
+	if test ! "$enable_video" = "yes"; then
 	enable_video="no"
+	fi
 	;;
 esac
 
@@ -6556,6 +6561,18 @@ $as_echo "Checking if OpenGL ES 2 is available... no" >&6; }
 	fi
 	ac_android_cflags="$ac_android_cflags -DPJMEDIA_VIDEO_DEV_HAS_ANDROID=1"
 	;;
+  *mingw*)
+	if test "$enable_video" = "yes"; then
+	  ac_pjmedia_video=windows_os
+
+	  ac_pjmedia_video_dev_has_dshow=yes
+
+	  ac_dshow_cflags="-DPJMEDIA_HAS_VIDEO=1 -DPJMEDIA_VIDEO_DEV_HAS_DSHOW=1"
+
+	  ac_dshow_ldflags=" -lstdc++ -lquartz -lole32 -loleaut32 -lrpcrt4 -lwinmm -luuid -lmingwex -lstrmiids "
+	  LIBS="$LIBS -lstdc++ -lquartz -lole32 -loleaut32 -lrpcrt4 -lwinmm -luuid -lmingwex -lstrmiids "
+	fi
+	;;
   *darwin*)
 	ac_pjmedia_video=darwin_os
 
@@ -7064,6 +7081,7 @@ $as_echo "not found" >&6; }
 			ac_sdl_cflags=`$SDL_CONFIG --cflags`
 			ac_sdl_cflags="-DPJMEDIA_VIDEO_DEV_HAS_SDL=1 $ac_sdl_cflags"
 			ac_sdl_ldflags=`$SDL_CONFIG --libs`
+			ac_sdl_ldflags=${ac_sdl_ldflags//-mwindows/}
 			LIBS="$LIBS $ac_sdl_ldflags"
 		  else
 			{ $as_echo "$as_me:${as_lineno-$LINENO}: result: Unsupported SDL version" >&5
diff --git a/aconfigure.ac b/aconfigure.ac
index d24f1431e..a72215b36 100644
--- a/aconfigure.ac
+++ b/aconfigure.ac
@@ -772,10 +772,12 @@ fi
 
 AC_SUBST(ac_pjmedia_video)
 
-# Disable video on mingw
+# Disable video on mingw by default (but respect --enable-video=yes)
 case $target in
  *mingw*)
+	if test ! "$enable_video" = "yes"; then
 	enable_video="no"
+	fi
 	;;
 esac
 
@@ -828,6 +830,18 @@ else
 	fi
 	ac_android_cflags="$ac_android_cflags -DPJMEDIA_VIDEO_DEV_HAS_ANDROID=1"
 	;;
+  *mingw*)
+	if test "$enable_video" = "yes"; then
+	  ac_pjmedia_video=windows_os
+	  AC_SUBST(ac_pjmedia_video_dev_has_dshow)
+	  ac_pjmedia_video_dev_has_dshow=yes
+	  AC_SUBST(ac_dshow_cflags)
+	  ac_dshow_cflags="-DPJMEDIA_HAS_VIDEO=1 -DPJMEDIA_VIDEO_DEV_HAS_DSHOW=1"
+	  AC_SUBST(ac_dshow_ldflags)
+	  ac_dshow_ldflags=" -lstdc++ -lquartz -lole32 -loleaut32 -lrpcrt4 -lwinmm -luuid -lmingwex -lstrmiids "
+	  LIBS="$LIBS -lstdc++ -lquartz -lole32 -loleaut32 -lrpcrt4 -lwinmm -luuid -lmingwex -lstrmiids "
+	fi
+	;;
   *darwin*)
 	ac_pjmedia_video=darwin_os
 	AC_SUBST(ac_pjmedia_video_has_darwin)
@@ -1082,6 +1096,7 @@ AC_ARG_ENABLE(sdl,
 			ac_sdl_cflags=`$SDL_CONFIG --cflags`
 			ac_sdl_cflags="-DPJMEDIA_VIDEO_DEV_HAS_SDL=1 $ac_sdl_cflags"
 			ac_sdl_ldflags=`$SDL_CONFIG --libs`
+			ac_sdl_ldflags=${ac_sdl_ldflags//-mwindows/}
 			LIBS="$LIBS $ac_sdl_ldflags"
 		  else
 			AC_MSG_RESULT([Unsupported SDL version])
diff --git a/build.mak.in b/build.mak.in
index 1a18a8513..28e31386e 100644
--- a/build.mak.in
+++ b/build.mak.in
@@ -187,13 +187,22 @@ AC_PJMEDIA_VIDEO_HAS_VTOOLBOX = @ac_pjmedia_video_has_vtoolbox@
 AC_PJMEDIA_VIDEO_HAS_IOS_OPENGL = @ac_pjmedia_video_has_ios_opengl@
 DARWIN_CFLAGS = @ac_darwin_cflags@
 
+# mingw
+AC_PJMEDIA_VIDEO_DEV_HAS_DSHOW = @ac_pjmedia_video_dev_has_dshow@
+ifeq (@ac_pjmedia_video_dev_has_dshow@,yes)
+DSHOW_CFLAGS = @ac_dshow_cflags@
+DSHOW_LDFLAGS = @ac_dshow_ldflags@
+APP_THIRD_PARTY_LIB_FILES += $(PJ_DIR)/third_party/lib/libbaseclasses-$(LIB_SUFFIX)
+APP_THIRD_PARTY_LIBS += -lbaseclasses-$(TARGET_NAME)
+endif
+
 # Android
 ANDROID_CFLAGS = @ac_android_cflags@
 
 # PJMEDIA features exclusion
-PJ_VIDEO_CFLAGS += $(SDL_CFLAGS) $(FFMPEG_CFLAGS) $(V4L2_CFLAGS) $(QT_CFLAGS) \
+PJ_VIDEO_CFLAGS += $(SDL_CFLAGS) $(FFMPEG_CFLAGS) $(V4L2_CFLAGS) $(DSHOW_CFLAGS) $(QT_CFLAGS) \
 		   $(OPENH264_CFLAGS) $(VPX_CFLAGS) $(DARWIN_CFLAGS)
-PJ_VIDEO_LDFLAGS += $(SDL_LDFLAGS) $(FFMPEG_LDFLAGS) $(V4L2_LDFLAGS) \
+PJ_VIDEO_LDFLAGS += $(SDL_LDFLAGS) $(FFMPEG_LDFLAGS) $(V4L2_LDFLAGS) $(DSHOW_LDFLAGS) \
                    $(OPENH264_LDFLAGS) $(VPX_LDFLAGS)
 
 # CFLAGS, LDFLAGS, and LIBS to be used by applications
diff --git a/build/rules.mak b/build/rules.mak
index 912199c41..f2ef26b4a 100644
--- a/build/rules.mak
+++ b/build/rules.mak
@@ -169,6 +169,11 @@ $(OBJDIR)/%$(OBJEXT): $(SRCDIR)/%.S | $(OBJDIRS)
 		$(CC_OUT)$(subst /,$(HOST_PSEP),$@) \
 		$(subst /,$(HOST_PSEP),$<) 
 
+$(OBJDIR)/dshowclasses.o: $(SRCDIR)/dshowclasses.cpp | $(OBJDIRS)
+	$(CXX) $($(APP)_CXXFLAGS) -I$(SRCDIR)/../../../third_party/BaseClasses -fpermissive \
+		$(CC_OUT)$(subst /,$(HOST_PSEP),$@) \
+		$(subst /,$(HOST_PSEP),$<)
+
 $(OBJDIR)/%$(OBJEXT): $(SRCDIR)/%.cpp | $(OBJDIRS)
 	$(CXX) $($(APP)_CXXFLAGS) \
 		$(CC_OUT)$(subst /,$(HOST_PSEP),$@) \
diff --git a/pjmedia/build/os-auto.mak.in b/pjmedia/build/os-auto.mak.in
index 4c8b4d3fb..fc2f8432b 100644
--- a/pjmedia/build/os-auto.mak.in
+++ b/pjmedia/build/os-auto.mak.in
@@ -18,6 +18,10 @@ FFMPEG_LDFLAGS =  @ac_ffmpeg_ldflags@
 V4L2_CFLAGS = @ac_v4l2_cflags@
 V4L2_LDFLAGS = @ac_v4l2_ldflags@
 
+# Directshow
+DSHOW_CFLAGS = @ac_dshow_cflags@
+DSHOW_LDFLAGS = @ac_dshow_ldflags@
+
 # QT
 AC_PJMEDIA_VIDEO_HAS_QT = @ac_pjmedia_video_has_qt@
 # QT_CFLAGS = @ac_qt_cflags@
@@ -39,10 +43,10 @@ VPX_LDFLAGS = @ac_vpx_ldflags@
 
 # PJMEDIA features exclusion
 export CFLAGS += @ac_no_small_filter@ @ac_no_large_filter@ @ac_no_speex_aec@ \
-		 $(SDL_CFLAGS) $(FFMPEG_CFLAGS) $(V4L2_CFLAGS) $(QT_CFLAGS) \
+		 $(SDL_CFLAGS) $(FFMPEG_CFLAGS) $(V4L2_CFLAGS) $(DSHOW_CFLAGS) $(QT_CFLAGS) \
 		 $(DARWIN_CFLAGS) $(ANDROID_CFLAGS) \
 		 $(OPENH264_CFLAGS) $(VPX_CFLAGS)
-export LDFLAGS += $(SDL_LDFLAGS) $(FFMPEG_LDFLAGS) $(V4L2_LDFLAGS) \
+export LDFLAGS += $(SDL_LDFLAGS) $(FFMPEG_LDFLAGS) $(V4L2_LDFLAGS) $(DSHOW_LDFLAGS) \
 		  $(OPENH264_LDFLAGS) $(VPX_LDFLAGS)
 
 # Define the desired sound device backend
@@ -289,6 +293,14 @@ ifeq ($(AC_PJMEDIA_VIDEO_HAS_IOS_OPENGL),yes)
 export PJMEDIA_VIDEODEV_OBJS += ios_opengl_dev.o
 endif
 
+#
+# Directshow video device
+#
+ifeq ($(AC_PJMEDIA_VIDEO_DEV_HAS_DSHOW),yes)
+export PJMEDIA_VIDEODEV_OBJS += dshow_dev.o dshowclasses.o
+export CFLAGS += -I$(THIRD_PARTY)/BaseClasses
+endif
+
 #
 # Android video device
 #
diff --git a/pjmedia/src/pjmedia-videodev/dshow_dev.c b/pjmedia/src/pjmedia-videodev/dshow_dev.c
index b28ef718d..c963014da 100644
--- a/pjmedia/src/pjmedia-videodev/dshow_dev.c
+++ b/pjmedia/src/pjmedia-videodev/dshow_dev.c
@@ -38,6 +38,8 @@
 
 #ifdef _MSC_VER
 #   pragma warning(pop)
+#else
+#include <amvideo2.h>
 #endif
 
 #pragma comment(lib, "Strmiids.lib")
diff --git a/pjsip-apps/build/Samples.mak b/pjsip-apps/build/Samples.mak
index 3857a33d0..35da66007 100644
--- a/pjsip-apps/build/Samples.mak
+++ b/pjsip-apps/build/Samples.mak
@@ -7,8 +7,8 @@ RULES_MAK := $(PJDIR)/build/rules.mak
 ###############################################################################
 # Gather all flags.
 #
-export _CFLAGS 	:= $(PJ_CFLAGS) $(CFLAGS)
-export _CXXFLAGS:= $(PJ_CXXFLAGS) $(CFLAGS)
+export _CFLAGS 	:= $(PJ_CFLAGS) $(CFLAGS) $(PJ_VIDEO_CFLAGS)
+export _CXXFLAGS:= $(PJ_CXXFLAGS) $(CFLAGS) $(PJ_VIDEO_CFLAGS)
 export _LDFLAGS := $(PJ_LDFLAGS) $(PJ_LDLIBS) $(LDFLAGS)
 export _LDXXFLAGS := $(PJ_LDXXFLAGS) $(PJ_LDXXLIBS) $(LDFLAGS)
 
diff --git a/pjsip-apps/src/samples/pjsua2_demo.cpp b/pjsip-apps/src/samples/pjsua2_demo.cpp
index f7784e9a4..05082db00 100644
--- a/pjsip-apps/src/samples/pjsua2_demo.cpp
+++ b/pjsip-apps/src/samples/pjsua2_demo.cpp
@@ -429,6 +429,7 @@ static void mainProg4(Endpoint &ep)
 #endif
 
 
+extern "C"
 int main()
 {
     int ret = 0;
diff --git a/pjsip/build/Makefile b/pjsip/build/Makefile
index c92ccc372..a434bfa45 100644
--- a/pjsip/build/Makefile
+++ b/pjsip/build/Makefile
@@ -163,7 +163,7 @@ export PJSUA2_TEST_SRCDIR = ../src/pjsua2-test
 export PJSUA2_TEST_OBJS += $(OS_OBJS) $(M_OBJS) $(CC_OBJS) $(HOST_OBJS) \
 			   main.o
 export PJSUA2_TEST_CFLAGS += $(_CFLAGS) $(PJ_VIDEO_CFLAGS)
-export PJSUA2_TEST_CXXFLAGS = $(_CXXFLAGS) $(PJSUA2_LIB_CFLAGS) 
+export PJSUA2_TEST_CXXFLAGS = $(_CXXFLAGS) $(PJSUA2_LIB_CFLAGS) $(PJ_VIDEO_CFLAGS)
 export PJSUA2_TEST_LDFLAGS += $(PJ_LDXXFLAGS) $(PJ_LDXXLIBS) $(LDFLAGS)
 ifeq ($(EXCLUDE_APP),0)
 export PJSUA2_TEST_EXE := pjsua2-test-$(TARGET_NAME)$(HOST_EXE)
@@ -182,7 +182,7 @@ export TEST_OBJS += dlg_core_test.o dns_test.o msg_err_test.o \
 		    tsx_basic_test.o tsx_bench.o tsx_uac_test.o \
 		    tsx_uas_test.o txdata_test.o uri_test.o \
 		    inv_offer_answer_test.o
-export TEST_CFLAGS += $(_CFLAGS)
+export TEST_CFLAGS += $(_CFLAGS) $(PJ_VIDEO_CFLAGS)
 export TEST_CXXFLAGS += $(_CXXFLAGS)
 export TEST_LDFLAGS += $(PJSIP_LDLIB) \
 		       $(PJSIP_UA_LDLIB) \
diff --git a/pjsip/src/pjsua2-test/main.cpp b/pjsip/src/pjsua2-test/main.cpp
index acd4de11d..46581a3c8 100644
--- a/pjsip/src/pjsua2-test/main.cpp
+++ b/pjsip/src/pjsua2-test/main.cpp
@@ -20,6 +20,7 @@
 
 using namespace pj;
 
+extern "C"
 int main(int argc, char *argv[])
 {
     Endpoint ep;
diff --git a/third_party/BaseClasses/amvideo2.h b/third_party/BaseClasses/amvideo2.h
new file mode 100644
index 000000000..6fda7f5a9
--- /dev/null
+++ b/third_party/BaseClasses/amvideo2.h
@@ -0,0 +1,26 @@
+/*
+  Some necessary macros are missing from mingw version. They are here.
+  See https://github.com/ofTheo/videoInput/blob/master/videoInputSrcAndDemos/libs/DShow/Include/amvideo.h
+*/
+//------------------------------------------------------------------------------
+// File: AMVideo.h
+//
+// Desc: Video related definitions and interfaces for ActiveMovie.
+//
+// Copyright (c) 1992 - 2001, Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------------------------
+
+#define TRUECOLOR(pbmi)  ((TRUECOLORINFO *)(((LPBYTE)&((pbmi)->bmiHeader)) \
+					+ (pbmi)->bmiHeader.biSize))
+#define COLORS(pbmi)	((RGBQUAD *)(((LPBYTE)&((pbmi)->bmiHeader)) 	\
+					+ (pbmi)->bmiHeader.biSize))
+
+#define SIZE_MASKS (iMASK_COLORS * sizeof(DWORD))
+#define SIZE_PREHEADER (FIELD_OFFSET(VIDEOINFOHEADER,bmiHeader))
+
+#define WIDTHBYTES(bits) ((DWORD)(((bits)+31) & (~31)) / 8)
+#define DIBWIDTHBYTES(bi) (DWORD)WIDTHBYTES((DWORD)(bi).biWidth * (DWORD)(bi).biBitCount)
+#define _DIBSIZE(bi) (DIBWIDTHBYTES(bi) * (DWORD)(bi).biHeight)
+#define DIBSIZE(bi) ((bi).biHeight < 0 ? (-1)*(_DIBSIZE(bi)) : _DIBSIZE(bi))
+
+#define PALETTISED(pbmi) ((pbmi)->bmiHeader.biBitCount <= iPALETTE)
diff --git a/third_party/BaseClasses/arithutil.cpp b/third_party/BaseClasses/arithutil.cpp
index 9600e5f3f..121094fc9 100644
--- a/third_party/BaseClasses/arithutil.cpp
+++ b/third_party/BaseClasses/arithutil.cpp
@@ -21,7 +21,7 @@
 // Enlarged integer divide - 64-bits / 32-bits > 32-bits
 //
 
-#ifndef _X86_
+#if !defined(_X86_) || !defined(_MSC_VER)
 
 #define LLtoU64(x) (*(unsigned __int64*)(void*)(&(x)))
 
diff --git a/third_party/BaseClasses/sal2.h b/third_party/BaseClasses/sal2.h
new file mode 100644
index 000000000..e59f760b7
--- /dev/null
+++ b/third_party/BaseClasses/sal2.h
@@ -0,0 +1,19 @@
+/*
+  See https://github.com/RobertBeckebans/RBDOOM-3-BFG/blob/master/neo/libs/mingw-hacks/sal.h
+*/
+/* From PortAudio, which is under MIT license:
+ * https://www.assembla.com/code/portaudio/subversion/nodes/portaudio/trunk/src/hostapi/wasapi/mingw-include/sal.h
+ */
+#pragma once
+
+#if __GNUC__ >=3
+#pragma GCC system_header
+#endif
+
+#define __in
+#define __out
+#define __deref_in
+#define __deref_inout_opt
+#define __field_ecount_opt(x)
+#define __in_bcount_opt(size)
+
diff --git a/third_party/BaseClasses/streams.h b/third_party/BaseClasses/streams.h
index 63f33dfe0..c8dcdb007 100644
--- a/third_party/BaseClasses/streams.h
+++ b/third_party/BaseClasses/streams.h
@@ -23,6 +23,11 @@
 #else
 #define AM_NOVTABLE
 #endif
+#else
+  #include <sal.h>
+  #include <sal2.h>
+  #define AM_NOVTABLE
+  #pragma GCC diagnostic ignored "-Wwrite-strings"
 #endif	// MSC_VER
 
 
@@ -193,6 +198,13 @@ const LONGLONG MAX_TIME = 0x7FFFFFFFFFFFFFFF;   /* Maximum LONGLONG value */
 //#include <edevdefs.h>   // External device control interface defines
 //#include <audevcod.h>   // audio filter device error event codes
 
+#ifndef	_MSC_VER
+
+#define min(a,b) ({ __typeof__ (a) _a = (a); __typeof__ (b) _b = (b); _a < _b ? _a : _b; })
+#include <amvideo2.h>
+
+#endif
+
 
 #else
     #ifdef DEBUG
diff --git a/third_party/BaseClasses/wxutil.cpp b/third_party/BaseClasses/wxutil.cpp
index 59474ed06..235d9fc0d 100644
--- a/third_party/BaseClasses/wxutil.cpp
+++ b/third_party/BaseClasses/wxutil.cpp
@@ -384,7 +384,7 @@ void * __stdcall memmoveInternal(void * dst, const void * src, size_t count)
 {
     void * ret = dst;
 
-#ifdef _X86_
+#if defined(_X86_) && defined(_MSC_VER)
     if (dst <= src || (char *)dst >= ((char *)src + count)) {
 
         /*
@@ -432,6 +432,7 @@ memmove_done:
     return ret;
 }
 
+#ifdef _MSC_VER
 HRESULT AMSafeMemMoveOffset(
     __in_bcount(dst_size) void * dst,
     __in size_t dst_size,
@@ -458,6 +459,7 @@ HRESULT AMSafeMemMoveOffset(
     memmoveInternal( (BYTE *)dst+cb_dst_offset, (BYTE *)src+cb_src_offset, count);
     return S_OK;
 }
+#endif
 
 
 #ifdef DEBUG
diff --git a/third_party/BaseClasses/wxutil.h b/third_party/BaseClasses/wxutil.h
index 305974a5f..9a35b6c19 100644
--- a/third_party/BaseClasses/wxutil.h
+++ b/third_party/BaseClasses/wxutil.h
@@ -337,6 +337,7 @@ public:
     }
 };
 
+#ifdef _MSC_VER
 // Ensures that memory is not read past the length source buffer
 // and that memory is not written past the length of the dst buffer
 //   dst - buffer to copy to
@@ -358,13 +359,14 @@ HRESULT AMSafeMemMoveOffset(
     __in size_t src_size,
     __in DWORD cb_src_offset,
     __in size_t count);
+#endif
 
 extern "C"
 void * __stdcall memmoveInternal(void *, const void *, size_t);
 
 inline void * __cdecl memchrInternal(const void *buf, int chr, size_t cnt)
 {
-#ifdef _X86_
+#if defined(_X86_) && defined(_MSC_VER)
     void *pRet = NULL;
 
     _asm {
diff --git a/third_party/build/baseclasses/Makefile b/third_party/build/baseclasses/Makefile
new file mode 100644
index 000000000..f0b817cc9
--- /dev/null
+++ b/third_party/build/baseclasses/Makefile
@@ -0,0 +1,72 @@
+include ../../../build.mak
+include ../../../build/common.mak
+
+export LIBDIR := ../../lib
+
+RULES_MAK := $(PJDIR)/build/rules.mak
+
+export BASECLASSES_LIB := libbaseclasses-$(TARGET_NAME)$(LIBEXT)
+
+ifeq ($(PJ_SHARED_LIBRARIES),)
+else
+export BASECLASSES_SONAME := libbaseclasses.$(SHLIB_SUFFIX)
+export BASECLASSES_SHLIB := $(BASECLASSES_SONAME).$(PJ_VERSION_MAJOR)
+endif
+
+###############################################################################
+# Gather all flags.
+#
+export _CFLAGS 	:= $(CC_CFLAGS) $(OS_CFLAGS) $(HOST_CFLAGS) $(M_CFLAGS) \
+		   $(CFLAGS) $(CC_INC)../../BaseClasses \
+		   $(CC_INC)../../../pjmedia/include $(CC_INC)../../../pjlib/include
+export _CXXFLAGS:= $(_CFLAGS) $(CC_CXXFLAGS) $(OS_CXXFLAGS) $(M_CXXFLAGS) \
+		   $(HOST_CXXFLAGS) $(CXXFLAGS)
+export _LDFLAGS := $(CC_LDFLAGS) $(OS_LDFLAGS) $(M_LDFLAGS) $(HOST_LDFLAGS) \
+		   $(LDFLAGS) 
+
+export BASECLASSES_SRCDIR = ../../BaseClasses
+export BASECLASSES_OBJS = amfilter.o amvideo.o arithutil.o combase.o ctlutil.o \
+                          mtype.o renbase.o wxdebug.o wxlist.o \
+                          wxutil.o 
+
+export BASECLASSES_CFLAGS = $(_CFLAGS)
+export BASECLASSES_CXXFLAGS = -fpermissive -D__STRSAFE__NO_INLINE=1 -DPJMEDIA_VIDEO_DEV_HAS_DSHOW=1 $(_CFLAGS)
+
+
+export CC_OUT CC AR RANLIB HOST_MV HOST_RM HOST_RMDIR HOST_MKDIR OBJEXT LD LDOUT 
+###############################################################################
+# Main entry
+#
+# $(TARGET) is defined in os-$(OS_NAME).mak file in current directory.
+#
+TARGETS := $(BASECLASSES_LIB) $(BASECLASSES_SONAME)
+
+all: $(TARGETS)
+
+doc:
+	cd .. && doxygen docs/doxygen.cfg
+
+dep: depend
+distclean: realclean
+
+.PHONY: all dep depend clean realclean distclean
+.PHONY: $(TARGETS)
+.PHONY: $(BASECLASSES_LIB) $(BASECLASSES_SONAME)
+
+libbaseclasses: $(BASECLASSES_LIB)
+$(BASECLASSES_SONAME): $(BASECLASSES_LIB)
+$(BASECLASSES_LIB) $(BASECLASSES_SONAME):
+	$(MAKE) -f $(RULES_MAK) APP=BASECLASSES app=baseclasses $(subst /,$(HOST_PSEP),$(LIBDIR)/$@)
+
+clean print_lib:
+	$(MAKE) -f $(RULES_MAK) APP=BASECLASSES app=baseclasses $@
+
+realclean:
+	$(subst @@,$(subst /,$(HOST_PSEP),.ilbc-$(TARGET_NAME).depend),$(HOST_RMR))
+	
+	$(MAKE) -f $(RULES_MAK) APP=BASECLASSES app=baseclasses $@
+
+depend:
+	$(MAKE) -f $(RULES_MAK) APP=BASECLASSES app=baseclasses $@
+
+
diff --git a/third_party/build/os-auto.mak.in b/third_party/build/os-auto.mak.in
index 22defec2c..b2f4ffb7a 100644
--- a/third_party/build/os-auto.mak.in
+++ b/third_party/build/os-auto.mak.in
@@ -39,6 +39,10 @@ else
 endif
 endif
 
+ifneq ($(findstring windows_os,@ac_pjmedia_video@),)
+DIRS += baseclasses
+endif
+
 ifneq (@ac_external_srtp@,0)
 # External SRTP
 else