diff --git a/src/net/java/sip/communicator/impl/neomedia/codec/video/h264/JNIEncoder.java b/src/net/java/sip/communicator/impl/neomedia/codec/video/h264/JNIEncoder.java
index 7fbd517ff..e6f2de30d 100644
--- a/src/net/java/sip/communicator/impl/neomedia/codec/video/h264/JNIEncoder.java
+++ b/src/net/java/sip/communicator/impl/neomedia/codec/video/h264/JNIEncoder.java
@@ -288,7 +288,7 @@ public synchronized void open() throws ResourceUnavailableException
         FFMPEG.avcodeccontext_set_scenechange_threshold(avcontext, 40);
         // Constant quality mode (also known as constant ratefactor)
         FFMPEG.avcodeccontext_set_crf(avcontext, 0);
-        FFMPEG.avcodeccontext_set_rc_buffer_size(avcontext, 10000000);
+        FFMPEG.avcodeccontext_set_rc_buffer_size(avcontext, 0);
         FFMPEG.avcodeccontext_set_gop_size(avcontext, IFRAME_INTERVAL);
         FFMPEG.avcodeccontext_set_i_quant_factor(avcontext, 1f / 1.4f);
 
diff --git a/src/net/java/sip/communicator/impl/neomedia/jmfext/media/protocol/imgstreaming/ImageStream.java b/src/net/java/sip/communicator/impl/neomedia/jmfext/media/protocol/imgstreaming/ImageStream.java
index 978b59595..820b7d0a6 100644
--- a/src/net/java/sip/communicator/impl/neomedia/jmfext/media/protocol/imgstreaming/ImageStream.java
+++ b/src/net/java/sip/communicator/impl/neomedia/jmfext/media/protocol/imgstreaming/ImageStream.java
@@ -302,8 +302,10 @@ public void run()
             byte data[] = null;
             BufferedImage scaledScreen = null;
             BufferedImage screen = null;
-
+            
+            /*
             long t = System.nanoTime();
+            */
 
             /* get desktop screen and resize it */
             screen = desktopInteract.captureScreen();
@@ -332,10 +334,12 @@ public void run()
             if(transferHandler != null)
             {
                 transferHandler.transferData(this);
+                Thread.yield();
             }
-
+            /*
             t = System.nanoTime() - t;
             logger.info("Desktop capture processing time: " + t);
+            */
 
             /* cleanup */
             screen = null;
@@ -344,8 +348,8 @@ public void run()
 
             try
             {
-                /* 500 ms */
-                Thread.sleep(500);
+                /* 100 ms */
+                Thread.sleep(100);
             }
             catch(InterruptedException e)
             {