diff --git a/run b/run
new file mode 100755
index 0000000..b9c3d45
--- /dev/null
+++ b/run
@@ -0,0 +1,23 @@
+#!/bin/bash
+# WF 2017-05-21
+jar=target/androidscreencast-0.0.11s-SNAPSHOT-executable.jar
+if [ ! -f $jar ]
+then
+  mvn package
+fi
+adb=`which adb`
+if [ $? -ne 0 ]
+then
+  echo "adb not on path "
+  echo "you might want to check your app.properties"
+  grep adb app.properties
+  exit 1
+fi
+grep $adb app.properties 
+if [  $? -ne 0 ]
+then
+  mv app.properties app.org
+  echo "adb=$adb" > app.properties
+  grep -v adb app.org >> app.properties
+fi
+java -jar $jar
diff --git a/src/main/java/com/github/xsavikx/androidscreencast/api/injector/ScreenCaptureRunnable.java b/src/main/java/com/github/xsavikx/androidscreencast/api/injector/ScreenCaptureRunnable.java
index 1f452f2..4a12906 100644
--- a/src/main/java/com/github/xsavikx/androidscreencast/api/injector/ScreenCaptureRunnable.java
+++ b/src/main/java/com/github/xsavikx/androidscreencast/api/injector/ScreenCaptureRunnable.java
@@ -37,6 +37,9 @@ public final class ScreenCaptureRunnable implements Runnable {
     private ScreenCaptureListener listener = null;
     private long currentAdbCommandTimeout;
     private boolean isStopped = false;
+    private double fps;
+    private long starttime;
+    private int frames;
 
     @Inject
     public ScreenCaptureRunnable(final IDevice device, @Named(ADB_COMMAND_TIMEOUT_KEY) long adbCommandTimeout) {
@@ -50,10 +53,14 @@ public ScreenCaptureRunnable(final IDevice device, @Named(ADB_COMMAND_TIMEOUT_KE
     public void run() {
         log().info("Starting screen capturing.");
         while (!isStopped) {
+            // prepare timing calculation
+            starttime=System.nanoTime();
+            frames=0;
             try {
                 final RawImage screenshot = getScreenshot();
                 if (screenshot != null) {
                     display(screenshot);
+                    calcfps();
                 } else {
                     log().info("Failed to get device screenshot.");
                 }
@@ -68,6 +75,23 @@ public void run() {
         log().info("Stopping screen capturing.");
     }
 
+    /**
+     * calculate the frames per second
+     */
+    private void calcfps() {
+      frames++;
+      long time = System.nanoTime();
+      long millis = (time-starttime)/1000000;
+      fps=(1000.0*frames)/millis;
+      LOGGER.info(String.format("%4.2f fps %4d msecs/frame",fps,millis/frames));
+    }
+
+    /**
+     * get a screen shot from the device via adb
+     * @return a raw image
+     * @throws InterruptedException
+     * @throws ClosedByInterruptException
+     */
     private RawImage getScreenshot() throws InterruptedException, ClosedByInterruptException {
         RawImage rawImage = null;
         try {
@@ -90,6 +114,10 @@ private RawImage getScreenshot() throws InterruptedException, ClosedByInterruptE
         return rawImage;
     }
 
+    /**
+     * display the given rawImage
+     * @param rawImage
+     */
     private void display(final RawImage rawImage) {
         final RawImage imageToProcess = landscape ? rawImage.getRotated() : rawImage;
         final BufferedImage image = ImageUtils.convertImage(imageToProcess);
diff --git a/src/test/java/com/github/xsavikx/androidscreencast/TestMain.java b/src/test/java/com/github/xsavikx/androidscreencast/TestMain.java
new file mode 100644
index 0000000..4690188
--- /dev/null
+++ b/src/test/java/com/github/xsavikx/androidscreencast/TestMain.java
@@ -0,0 +1,18 @@
+package com.github.xsavikx.androidscreencast;
+
+import org.junit.Test;
+
+/**
+ * test running main program
+ * @author wf
+ *
+ */
+public class TestMain {
+
+  @Test
+  public void testMain() {
+    String args[]={};
+    Main.main(args);
+  }
+
+}