diff --git a/src/main_window.cpp b/src/main_window.cpp
index 7ed2481..2cab9a4 100644
--- a/src/main_window.cpp
+++ b/src/main_window.cpp
@@ -1501,6 +1501,8 @@ void AC_MainWindow::setFade() {
     playback->setFadeFilter(fc);
 }
 
+std::mutex mutex_lock_;
+
 void AC_MainWindow::frameInc() {
     frame_index++;
     QString frame_string;
diff --git a/src/playback_thread.cpp b/src/playback_thread.cpp
index 8b99d2a..459f31a 100644
--- a/src/playback_thread.cpp
+++ b/src/playback_thread.cpp
@@ -70,7 +70,11 @@ bool Playback::setVideoCamera(std::string name, int type, int device, int res, c
     device_num = device;
     mutex.lock();
 //#if defined(__linux__) || defined(__APPLE__)
+#ifdef _WIN32
+    capture.open(cv::CAP_DSHOW+device);
+#else
     capture.open(device);
+#endif
     if(!capture.isOpened()) {
         mutex.unlock();
         return false;