diff --git a/plugins/channeltx/modatv/atvmod.cpp b/plugins/channeltx/modatv/atvmod.cpp
index 84070a4af..73e4ece88 100644
--- a/plugins/channeltx/modatv/atvmod.cpp
+++ b/plugins/channeltx/modatv/atvmod.cpp
@@ -15,6 +15,7 @@
 ///////////////////////////////////////////////////////////////////////////////////
 
 #include <QDebug>
+#include <time.h>
 
 #include "opencv2/imgproc/imgproc.hpp"
 
@@ -282,6 +283,44 @@ void ATVMod::pullVideo(Real& sample)
             else if ((m_running.m_atvModInput == ATVModInputCamera) && (m_running.m_cameraPlay))
             {
                 ATVCamera& camera = m_cameras[m_cameraIndex]; // currently selected canera
+
+                if (camera.m_videoFPS < 0.0f) // default frame rate when it could not be obtained via get
+                {
+                    time_t start, end;
+                    cv::Mat frame;
+
+                    MsgReportCameraData *report;
+                    report = MsgReportCameraData::create(
+                            camera.m_cameraNumber,
+                            0.0f,
+                            camera.m_videoWidth,
+                            camera.m_videoHeight,
+                            1); // open splash screen on GUI side
+                    getOutputMessageQueue()->push(report);
+
+                    time(&start);
+
+                    for (int i = 0; i < 120; i++) {
+                        camera.m_camera >> frame;
+                    }
+
+                    time(&end);
+
+                    double seconds = difftime (end, start);
+                    camera.m_videoFPS = (120 / seconds) * 0.95; // take a 5% guard
+                    camera.m_videoFPSq = camera.m_videoFPS / m_fps;
+                    camera.m_videoFPSCount = camera.m_videoFPSq;
+                    camera.m_videoPrevFPSCount = 0;
+
+                    report = MsgReportCameraData::create(
+                            camera.m_cameraNumber,
+                            camera.m_videoFPS,
+                            camera.m_videoWidth,
+                            camera.m_videoHeight,
+                            2); // close splash screen on GUI side
+                    getOutputMessageQueue()->push(report);
+                }
+
                 int grabOK;
                 int fpsIncrement = (int) camera.m_videoFPSCount - camera.m_videoPrevFPSCount;
 
@@ -445,7 +484,8 @@ bool ATVMod::handleMessage(const Message& cmd)
             		m_cameras[m_cameraIndex].m_cameraNumber,
     				m_cameras[m_cameraIndex].m_videoFPS,
     				m_cameras[m_cameraIndex].m_videoWidth,
-    				m_cameras[m_cameraIndex].m_videoHeight);
+    				m_cameras[m_cameraIndex].m_videoHeight,
+    				0);
             getOutputMessageQueue()->push(report);
     	}
     }
@@ -714,7 +754,7 @@ void ATVMod::scanCameras()
 			m_cameras.back().m_videoWidth = (int) m_cameras.back().m_camera.get(CV_CAP_PROP_FRAME_WIDTH);
 			m_cameras.back().m_videoHeight = (int) m_cameras.back().m_camera.get(CV_CAP_PROP_FRAME_HEIGHT);
 
-			m_cameras.back().m_videoFPS = m_cameras.back().m_videoFPS < 0 ? 25.0f : m_cameras.back().m_videoFPS;
+			//m_cameras.back().m_videoFPS = m_cameras.back().m_videoFPS < 0 ? 16.3f : m_cameras.back().m_videoFPS;
 
 			qDebug("ATVMod::scanCameras: [%d] FPS: %f %dx%d",
 			        i,
@@ -757,7 +797,8 @@ void ATVMod::getCameraNumbers(std::vector<int>& numbers)
                 m_cameras[0].m_cameraNumber,
                 m_cameras[0].m_videoFPS,
                 m_cameras[0].m_videoWidth,
-                m_cameras[0].m_videoHeight);
+                m_cameras[0].m_videoHeight,
+                0);
         getOutputMessageQueue()->push(report);
     }
 }
diff --git a/plugins/channeltx/modatv/atvmod.h b/plugins/channeltx/modatv/atvmod.h
index 0cae0b8ec..e775667e6 100644
--- a/plugins/channeltx/modatv/atvmod.h
+++ b/plugins/channeltx/modatv/atvmod.h
@@ -217,18 +217,21 @@ public:
         float getFPS() const { return m_fps; }
         int getWidth() const { return m_width; }
         int getHeight() const { return m_height; }
+        int getStatus() const { return m_status; }
 
         static MsgReportCameraData* create(
         		int deviceNumber,
-				int fps,
+				float fps,
 				int width,
-				int height)
+				int height,
+				int status)
         {
             return new MsgReportCameraData(
             		deviceNumber,
 					fps,
 					width,
-					height);
+					height,
+					status);
         }
 
     protected:
@@ -236,17 +239,20 @@ public:
         float m_fps;
         int m_width;
         int m_height;
+        int m_status;
 
         MsgReportCameraData(
         		int deviceNumber,
         		float fps,
 				int width,
-				int height) :
+				int height,
+				int status) :
             Message(),
 			m_deviceNumber(deviceNumber),
 			m_fps(fps),
 			m_width(width),
-			m_height(height)
+			m_height(height),
+			m_status(status)
         { }
     };
 
diff --git a/plugins/channeltx/modatv/atvmodgui.cpp b/plugins/channeltx/modatv/atvmodgui.cpp
index 31641e325..b128c8f2c 100644
--- a/plugins/channeltx/modatv/atvmodgui.cpp
+++ b/plugins/channeltx/modatv/atvmodgui.cpp
@@ -19,6 +19,7 @@
 #include <QFileDialog>
 #include <QTime>
 #include <QDebug>
+#include <QMessageBox>
 
 #include "device/devicesinkapi.h"
 #include "dsp/upchannelizer.h"
@@ -168,6 +169,23 @@ bool ATVModGUI::handleMessage(const Message& message)
         ui->cameraDeviceNumber->setText(tr("#%1").arg(rpt.getdeviceNumber()));
         ui->camerFPS->setText(tr("%1 FPS").arg(rpt.getFPS(), 0, 'f', 2));
         ui->cameraImageSize->setText(tr("%1x%2").arg(rpt.getWidth()).arg(rpt.getHeight()));
+
+        int status = rpt.getStatus();
+
+        if (status == 1) // camera FPS scan is startng
+        {
+            m_camBusyFPSMessageBox = new QMessageBox();
+            m_camBusyFPSMessageBox->setText("Computing camera FPS. Please wait…");
+            m_camBusyFPSMessageBox->setStandardButtons(0);
+            m_camBusyFPSMessageBox->show();
+        }
+        else if (status == 2) // camera FPS scan is finished
+        {
+            m_camBusyFPSMessageBox->close();
+            if (m_camBusyFPSMessageBox) delete m_camBusyFPSMessageBox;
+            m_camBusyFPSMessageBox = 0;
+        }
+
     	return true;
     }
     else
@@ -346,7 +364,8 @@ ATVModGUI::ATVModGUI(PluginAPI* pluginAPI, DeviceSinkAPI *deviceAPI, QWidget* pa
     m_videoFrameRate(48000),
     m_frameCount(0),
     m_tickCount(0),
-    m_enableNavTime(false)
+    m_enableNavTime(false),
+    m_camBusyFPSMessageBox(0)
 {
 	ui->setupUi(this);
 	setAttribute(Qt::WA_DeleteOnClose, true);
diff --git a/plugins/channeltx/modatv/atvmodgui.h b/plugins/channeltx/modatv/atvmodgui.h
index abf6c325c..bb541825c 100644
--- a/plugins/channeltx/modatv/atvmodgui.h
+++ b/plugins/channeltx/modatv/atvmodgui.h
@@ -29,6 +29,7 @@ class DeviceSinkAPI;
 class ThreadedBasebandSampleSource;
 class UpChannelizer;
 class ATVMod;
+class QMessageBox;
 
 namespace Ui {
     class ATVModGUI;
@@ -103,6 +104,7 @@ private:
     int m_frameCount;
     std::size_t m_tickCount;
     bool m_enableNavTime;
+    QMessageBox *m_camBusyFPSMessageBox;
 
     explicit ATVModGUI(PluginAPI* pluginAPI, DeviceSinkAPI *deviceAPI, QWidget* parent = NULL);
     virtual ~ATVModGUI();