v3.1.t1

-Fixed the compile error for older versions of QT.

src/camera.cpp

@@ -317,7 +317,7 @@ bool EventLoop::exec()
 
     for (auto i : rmIndx)
     {
-        shared->recList.remove(i);
+        shared->recList.removeAt(i);
     }
 
     shared->recMutex.unlock();