diff --git a/FrameGrabber.h b/FrameGrabber.h
index 2f967c8..4d2caec 100644
--- a/FrameGrabber.h
+++ b/FrameGrabber.h
@@ -6,6 +6,8 @@
 
 #include <gst/gst.h>
 
+#include "GlmToolkit.h"
+
 class FrameBuffer;
 /**
  * @brief The FrameGrabber class defines the base class for all recorders
@@ -15,14 +17,27 @@ class FrameBuffer;
  */
 class FrameGrabber
 {
+    uint64_t id_;
+
 public:
     FrameGrabber(): finished_(false), pbo_index_(0), pbo_next_index_(0), size_(0)
     {
+        id_ = GlmToolkit::uniqueId();
         pbo_[0] = pbo_[1] = 0;
     }
-
     virtual ~FrameGrabber() {}
 
+    inline uint64_t id() const { return id_; }
+    struct hasId: public std::unary_function<FrameGrabber*, bool>
+    {
+        inline bool operator()(const FrameGrabber* elem) const {
+           return (elem && elem->id() == _id);
+        }
+        hasId(uint64_t id) : _id(id) { }
+    private:
+        uint64_t _id;
+    };
+
     virtual void addFrame(FrameBuffer *frame_buffer, float dt) = 0;
     virtual void stop() { }
     virtual std::string info() { return ""; }
@@ -31,6 +46,7 @@ public:
     inline bool finished() const { return finished_; }
 
 protected:
+
     // thread-safe testing termination
     std::atomic<bool> finished_;
 
diff --git a/Session.cpp b/Session.cpp
index a72fc71..4646ac4 100644
--- a/Session.cpp
+++ b/Session.cpp
@@ -297,7 +297,8 @@ int Session::index(SourceList::iterator it) const
 
 void Session::addFrameGrabber(FrameGrabber *rec)
 {
-    grabbers_.push_back(rec);
+    if (rec != nullptr)
+        grabbers_.push_back(rec);
 }
 
 
@@ -309,6 +310,18 @@ FrameGrabber *Session::frontFrameGrabber()
         return grabbers_.front();
 }
 
+FrameGrabber *Session::getFrameGrabber(uint64_t id)
+{
+    if (!grabbers_.empty())
+    {
+        std::list<FrameGrabber *>::iterator iter = std::find_if(grabbers_.begin(), grabbers_.end(), FrameGrabber::hasId(id));
+        if (iter != grabbers_.end())
+            return (*iter);
+    }
+
+    return nullptr;
+}
+
 void Session::stopAllFrameGrabbers()
 {
     std::list<FrameGrabber *>::iterator iter;
diff --git a/Session.h b/Session.h
index 26a9664..13d66de 100644
--- a/Session.h
+++ b/Session.h
@@ -61,6 +61,7 @@ public:
     // Recorders
     void addFrameGrabber(FrameGrabber *rec);
     FrameGrabber *frontFrameGrabber();
+    FrameGrabber *getFrameGrabber(uint64_t id);
     void stopAllFrameGrabbers();
     void clearAllFrameGrabbers();
     void transferFrameGrabber(Session *dest);
diff --git a/UserInterfaceManager.cpp b/UserInterfaceManager.cpp
index ad24e39..0626193 100644
--- a/UserInterfaceManager.cpp
+++ b/UserInterfaceManager.cpp
@@ -151,12 +151,18 @@ static std::string FolderDialog(const std::string &path)
 
 UserInterface::UserInterface()
 {
+    ctrl_modifier_active = false;
+    alt_modifier_active = false;
+    shift_modifier_active = false;
     show_vimix_config = false;
     show_imgui_about = false;
     show_gst_about = false;
     show_opengl_about = false;
     currentTextEdit = "";
     screenshot_step = 0;
+
+    video_recorder_ = 0;
+    video_streamer_ = 0;
 }
 
 bool UserInterface::Init()
@@ -294,11 +300,16 @@ void UserInterface::handleKeyboard()
         }
         else if (ImGui::IsKeyPressed( GLFW_KEY_R )) {
             // toggle recording
-            FrameGrabber *rec = Mixer::manager().session()->frontFrameGrabber();
-            if (rec)
+            FrameGrabber *rec = Mixer::manager().session()->getFrameGrabber(video_recorder_);
+            if (rec) {
                 rec->stop();
-            else
-                Mixer::manager().session()->addFrameGrabber(new VideoRecorder);
+                video_recorder_ = 0;
+            }
+            else {
+                FrameGrabber *fg = new VideoRecorder;
+                video_recorder_ = fg->id();
+                Mixer::manager().session()->addFrameGrabber(fg);
+            }
         }
         else if (ImGui::IsKeyPressed( GLFW_KEY_Z )) {
             if (shift_modifier_active)
@@ -773,10 +784,11 @@ void UserInterface::Render()
     if (Settings::application.widget.stats)
         ImGuiToolkit::ShowStats(&Settings::application.widget.stats, &Settings::application.widget.stats_corner);
 
-    // TODO: better management of main_video_recorder
-    FrameGrabber *rec = Mixer::manager().session()->frontFrameGrabber();
+    // management of video_recorder
+    FrameGrabber *rec = Mixer::manager().session()->getFrameGrabber(video_recorder_);
     if (rec && rec->duration() > Settings::application.record.timeout ){
         rec->stop();
+        video_recorder_ = 0;
     }
 
     // all IMGUI Rendering
@@ -1089,7 +1101,7 @@ void UserInterface::RenderPreview()
 
         }
 
-        FrameGrabber *rec = Mixer::manager().session()->frontFrameGrabber();
+        FrameGrabber *rec = Mixer::manager().session()->getFrameGrabber(video_recorder_);
 
         // return from thread for folder openning
         if ( !recordFolderFileDialogs.empty() ) {
@@ -1128,12 +1140,15 @@ void UserInterface::RenderPreview()
                 if (rec) {
                     if ( ImGui::MenuItem( ICON_FA_SQUARE "  Stop Record", CTRL_MOD "R") ) {
                         rec->stop();
+                        video_recorder_ = 0;
                     }
                 }
                 // start recording
                 else {
                     if ( ImGui::MenuItem( ICON_FA_CIRCLE "  Record", CTRL_MOD "R") ) {
-                        Mixer::manager().session()->addFrameGrabber(new VideoRecorder);
+                        FrameGrabber *fg = new VideoRecorder;
+                        video_recorder_ = fg->id();
+                        Mixer::manager().session()->addFrameGrabber(fg);
                     }
                     // select profile
                     ImGui::SetNextItemWidth(300);
diff --git a/UserInterfaceManager.h b/UserInterfaceManager.h
index 2cbe355..429f023 100644
--- a/UserInterfaceManager.h
+++ b/UserInterfaceManager.h
@@ -115,6 +115,10 @@ class UserInterface
     bool show_opengl_about;
     unsigned int screenshot_step;
 
+    // frame grabbers
+    uint64_t video_recorder_;
+    uint64_t video_streamer_;
+
     // Private Constructor
     UserInterface();
     UserInterface(UserInterface const& copy);            // Not Implemented