From 14e7306992c36e26448586a4bf5c11384f5a037b Mon Sep 17 00:00:00 2001
From: Vasily Evseenko <svpcom@gmail.com>
Date: Mon, 23 Jan 2017 19:08:28 +0300
Subject: [PATCH] Add README

---
 LICENSE   |  2 +-
 README.md | 26 ++++++++++++++++++++++++++
 rx.sh     |  6 +++---
 3 files changed, 30 insertions(+), 4 deletions(-)
 create mode 100644 README.md

diff --git a/LICENSE b/LICENSE
index f85606e..d51fd40 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 	 wifibroadcast and its FEC code are free software
 
-				 you can redistribute wifibroadcast core functionality and/or
+         you can redistribute wifibroadcast core functionality and/or
 	 it them under the terms of the GNU General Public License as
 	 published by the Free Software Foundation; either version 2 of
 	 the License.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..d8d19e7
--- /dev/null
+++ b/README.md
@@ -0,0 +1,26 @@
+This is a completely rewrited from scratch version of https://befinitiv.wordpress.com/wifibroadcast-analog-like-transmission-of-live-video-data/
+The main modification is how to data are encapsulated into ieee80211 frames. The original wifibroadcast/wifibroadcast-ez accepts stream
+of bytes and split them into packets don't related to x264 stream structure. This can emit up to 100ms latencies.  In my case wifibroadcast accepts
+UDP stream (for example x264 encapsulated into RTP packets). This provides low latency streaming.
+
+Sample usage chain:
+```
+Camera -> gstreamer --[RTP stream (UDP)]--> wifibroadcast_tx --//--[ RADIO ]\
+  --//--> wifibroadcast_rx --[RTP stream (UDP)]--> gstreamer --> Display
+```
+
+For encode logitech c920 camera:
+```
+gst-launch-1.0 uvch264src device=/dev/video0 initial-bitrate=6000000 average-bitrate=6000000 iframe-period=1000 name=src auto-start=true \
+               src.vidsrc ! queue ! video/x-h264,width=1920,height=1080,framerate=30/1 ! h264parse ! rtph264pay ! udpsink host=localhost port=5600
+```
+
+To decode:
+```
+ gst-launch-1.0 udpsrc port=5600 caps='application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264' \
+               ! rtph264depay ! avdec_h264 ! clockoverlay valignment=bottom ! autovideosink fps-update-interval=1000 sync=false
+```
+
+
+Supported WiFi hardware:  Ralink RT2800. Was tested with ALPHA AWUS05NH v2 in 5GHz mode. To disable ieee80211 autospeed and maximize output power you
+need to apply kernel patches from ``patches`` directory. See https://github.com/bortek/EZ-WifiBroadcast/wiki for details.
\ No newline at end of file
diff --git a/rx.sh b/rx.sh
index 2f71e6b..4831db7 100755
--- a/rx.sh
+++ b/rx.sh
@@ -1,8 +1,8 @@
 #!/bin/bash
 
 WLANS=$@
-CHANNEL5G="6"
-#CHANNEL5G="149"
+#CHANNEL5G="6"
+CHANNEL5G="149"
 
 for WLAN in $WLANS
 do
@@ -14,5 +14,5 @@ ifconfig $WLAN up
 iwconfig $WLAN channel $CHANNEL5G
 done
 
-./rx -u 5601 $WLANS
+./rx -u 5600 $WLANS
 #tcpdump -i $WLAN 'ether[0x0a:4]==0x13223344'