readme - Testing section before Using section

- more logical flow

README.md

@@ -70,6 +70,42 @@ cmake ..
 make
 ```
 
+## Testing
+
+Assuming:
+- you are using VAAPI device "/dev/dri/renderD128"
+- port is 9766
+- codec is h264
+
+### Receiving side
+
+```bash
+./nhvd-receive-example 9766 vaapi h264 /dev/dri/renderD128
+```
+
+### Sending side
+
+For a quick test you may use [NHVE](https://github.com/bmegli/network-hardware-video-encoder) procedurally generated H.264 video (recommended).
+
+```bash
+# assuming you build NHVE, in build directory
+./nhve-stream-h264 127.0.0.1 9766 10 /dev/dri/renderD128
+```
+
+If you have Realsense camera you may use [realsense-network-hardware-video-encoder](https://github.com/bmegli/realsense-network-hardware-video-encoder).
+
+```bash
+# assuming you build RNHVE, in build directory
+./realsense-nhve-h264 127.0.0.1 9766 color 640 360 30 10 /dev/dri/renderD128
+```
+
+If everything went well you will:
+- see hardware initialized
+- collected frames info
+- decoded frames size
+
+If you have multiple vaapi devices you may have to specify correct one e.g. "/dev/dri/renderD129"
+
 ## Using
 
 See [HVD](https://github.com/bmegli/hardware-video-decoder) docs for details about hardware configuration.
@@ -113,42 +149,6 @@ See examples directory for a more complete example.
 	nhvd_close(network_decoder);
 ```
 
-## Testing
-
-Assuming:
-- you are using VAAPI device "/dev/dri/renderD128"
-- port is 9766
-- codec is h264
-
-### Receiving side
-
-```bash
-./nhvd-receive-example 9766 vaapi h264 /dev/dri/renderD128
-```
-
-### Sending side
-
-For a quick test you may use [NHVE](https://github.com/bmegli/network-hardware-video-encoder) procedurally generated H.264 video (recommended).
-
-```bash
-# assuming you build NHVE, in build directory
-./nhve-stream-h264 127.0.0.1 9766 10 /dev/dri/renderD128
-```
-
-If you have Realsense camera you may use [realsense-network-hardware-video-encoder](https://github.com/bmegli/realsense-network-hardware-video-encoder).
-
-```bash
-# assuming you build RNHVE, in build directory
-./realsense-nhve-h264 127.0.0.1 9766 color 640 360 30 10 /dev/dri/renderD128
-```
-
-If everything went well you will:
-- see hardware initialized
-- collected frames info
-- decoded frames size
-
-If you have multiple vaapi devices you may have to specify correct one e.g. "/dev/dri/renderD129"
-
 ## License
 
 Library and my dependencies are licensed under Mozilla Public License, v. 2.0