diff --git a/image_yolov4.sh b/image_yolov4.sh
new file mode 100755
index 00000000..be3fd104
--- /dev/null
+++ b/image_yolov4.sh
@@ -0,0 +1,6 @@
+
+
+./darknet detector test ./cfg/coco.data ./cfg/yolov4.cfg ./yolov4.weights data/dog.jpg -i 0 -thresh 0.25
+
+
+
diff --git a/include/darknet.h b/include/darknet.h
index b08ae708..c42cba10 100644
--- a/include/darknet.h
+++ b/include/darknet.h
@@ -985,6 +985,7 @@ LIB_API network *load_network(char *cfg, char *weights, int clear);
 LIB_API network *load_network_custom(char *cfg, char *weights, int clear, int batch);
 LIB_API network *load_network(char *cfg, char *weights, int clear);
 LIB_API void free_network(network net);
+LIB_API void free_network_ptr(network* net);
 
 // network.c
 LIB_API load_args get_base_args(network *net);
diff --git a/net_cam_v4.sh b/net_cam_v4.sh
new file mode 100755
index 00000000..5b7520e6
--- /dev/null
+++ b/net_cam_v4.sh
@@ -0,0 +1,6 @@
+#rm test_dnn_out.avi
+
+./darknet detector demo ./cfg/coco.data ./cfg/yolov4.cfg ./yolov4.weights rtsp://admin:admin12345@192.168.0.228:554 -i 0 -thresh 0.25
+
+
+
diff --git a/src/blas.c b/src/blas.c
index 7311875e..a21bca69 100644
--- a/src/blas.c
+++ b/src/blas.c
@@ -289,7 +289,7 @@ void normalize_cpu(float *x, float *mean, float *variance, int batch, int filter
         for(f = 0; f < filters; ++f){
             for(i = 0; i < spatial; ++i){
                 int index = b*filters*spatial + f*spatial + i;
-                x[index] = (x[index] - mean[f])/(sqrt(variance[f] + .000001f));
+                x[index] = (x[index] - mean[f])/(sqrt(variance[f] + .00001f));
             }
         }
     }
diff --git a/src/network.c b/src/network.c
index c3c08cee..a28a3429 100644
--- a/src/network.c
+++ b/src/network.c
@@ -1164,6 +1164,11 @@ float network_accuracy_multi(network net, data d, int n)
     return acc;
 }
 
+void free_network_ptr(network* net)
+{
+    free_network(*net);
+}
+
 void free_network(network net)
 {
     int i;
diff --git a/video_yolov4.sh b/video_yolov4.sh
new file mode 100755
index 00000000..159c8558
--- /dev/null
+++ b/video_yolov4.sh
@@ -0,0 +1,6 @@
+
+
+./darknet detector demo ./cfg/coco.data ./cfg/yolov4.cfg ./yolov4.weights test50.mp4 -i 0 -thresh 0.25
+
+
+