diff --git a/.gitignore b/.gitignore
index 8a0b303..f178bea 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@
 3rdparty/pittpatt*
 3rdparty/cvmatio
 3rdparty/dlib*
+3rdparty/libav*
 data/*/img
 data/*/vid
 data/PCSO/*
diff --git a/openbr/plugins/cmake/libav.cmake b/openbr/plugins/cmake/libav.cmake
index c5cd622..bdd7c7f 100644
--- a/openbr/plugins/cmake/libav.cmake
+++ b/openbr/plugins/cmake/libav.cmake
@@ -1,7 +1,25 @@
 set(BR_WITH_LIBAV OFF CACHE BOOL "Build with LibAV")
 
 if(${BR_WITH_LIBAV})
-  find_package(LibAV REQUIRED)
+  if(WIN32 AND NOT LIBAV_ROOT_DIR)
+    ExternalProject_Add(libav
+                        URL http://builds.libav.org/windows/release-lgpl/libav-x86_64-w64-mingw32-11.2.7z
+                        URL_MD5 902abcf8d1562adcc367424889a81b36
+                        SOURCE_DIR "${PROJECT_SOURCE_DIR}/3rdparty/libav"
+                        CONFIGURE_COMMAND ""
+                        BUILD_COMMAND ""
+                        INSTALL_COMMAND "")
+    set(LIBAV_ROOT_DIR "${PROJECT_SOURCE_DIR}/3rdparty/libav/usr")
+    set(LIBAV_INCLUDE_DIR "${PROJECT_SOURCE_DIR}/3rdparty/libav/usr/include")
+    list(APPEND LIBAV_LIBRARIES "${PROJECT_SOURCE_DIR}/3rdparty/libav/usr/bin/avcodec.lib"
+                                "${PROJECT_SOURCE_DIR}/3rdparty/libav/usr/bin/avdevice.lib"
+                                "${PROJECT_SOURCE_DIR}/3rdparty/libav/usr/bin/avformat.lib"
+                                "${PROJECT_SOURCE_DIR}/3rdparty/libav/usr/bin/avutil.lib"
+                                "${PROJECT_SOURCE_DIR}/3rdparty/libav/usr/bin/swscale.lib")
+  else()
+    find_package(LibAV REQUIRED)
+  endif()
+
   include_directories(${LIBAV_INCLUDE_DIR})
   set(BR_THIRDPARTY_LIBS ${BR_THIRDPARTY_LIBS} ${LIBAV_LIBRARIES})