diff --git a/Mixer.cpp b/Mixer.cpp
index 091d0a2..9cc456c 100644
--- a/Mixer.cpp
+++ b/Mixer.cpp
@@ -109,8 +109,7 @@ static void saveSession(const std::string& filename, Session *session)
     session->unlock();
 }
 
-Mixer::Mixer() : session_(nullptr), back_session_(nullptr), current_view_(nullptr),
-                 /*update_time_(GST_CLOCK_TIME_NONE),*/ dt_(0.f), fps_(59.f)
+Mixer::Mixer() : session_(nullptr), back_session_(nullptr), current_view_(nullptr), dt_(0.f), dt__(0.f)
 {
     // unsused initial empty session
     session_ = new Session;
@@ -203,9 +202,8 @@ void Mixer::update()
     dt_ = g_timer_elapsed (timer, NULL) * 1000.0;
     g_timer_start(timer);
 
-    // compute fps
-    if (dt_ > 1.f)
-        fps_ = 1.f / (dt_+1.f) + 0.999f * fps_;
+    // compute stabilized dt__
+    dt__ = 0.05f * dt_ + 0.95f * dt__;
 
     // update session and associated sources
     session_->update(dt_);
diff --git a/Mixer.h b/Mixer.h
index f7160d6..2f0623e 100644
--- a/Mixer.h
+++ b/Mixer.h
@@ -33,7 +33,7 @@ public:
     // update session and all views
     void update();
     inline float dt() const { return dt_;}
-    inline float fps() const { return fps_;}
+    inline int fps() const { return int(roundf(1000.f/dt__));}
 
     // draw session and current view
     void draw();
@@ -129,7 +129,7 @@ protected:
     TransitionView transition_;
 
     float dt_;
-    float fps_;
+    float dt__;
 };
 
 #endif // MIXER_H