fixed JaerAviWriter to ensure that active rendering (rather than requ…

…esting repaint) is on while writing a movie.

Otherwise frames can be dropped from output video.

src/net/sf/jaer/util/avioutput/JaerAviWriter.java

@@ -65,13 +65,19 @@ public void annotate(GLAutoDrawable drawable) {
         }
 
         if (isRecordingActive() && isWriteEnabled() && writeFrameNowFlag) {
+            if(!chip.getAeViewer().isActiveRenderingEnabled()){
+                chip.getAeViewer().setActiveRenderingEnabled(true);
+                showPlainMessageDialogInSwingThread("Set active rendering enabled (View/View/Filtering options) to ensure that each frame is painted", "Active rendering enabled");
+            }
             GL2 gl = drawable.getGL().getGL2();
             BufferedImage bi = toImage(gl, drawable.getNativeSurface().getSurfaceWidth(), drawable.getNativeSurface().getSurfaceHeight());
             int timecode = chip.getAeViewer().getAePlayer().getTime();
             writeFrame(bi, timecode);
             writeFrameNowFlag=false; // TODO move to super
         }
     }
+
+
 
     /**
      * @return the showTimeFactor