diff --git a/README.md b/README.md
index 0316cdd..9bfa6e1 100644
--- a/README.md
+++ b/README.md
@@ -1,81 +1,40 @@
-![rpidatv banner](/doc/img/spectreiq.jpg)
-# rpidatv
-**rpidatv** is a digital television transmitter for Raspberry Pi (B,B+,PI2,PI3,Pizero) which output directly to GPIO. 
-*(Created by Evariste Courjaud F5OEO. Code is GPL)*
 
-# Installation
-Install a Raspbian Lite : ([Raspbian Lite](http://www.raspberrypi.org/downloads/raspbian/))
+# avc2ts
 
-```sh
-$ wget https://raw.githubusercontent.com/F5OEO/rpidatv/master/install.sh
-$ chmod +x install.sh
-$ ./install.sh
-```
+avc2ts is a video encoder for the Raspberry Pi that encodes the video into H.264
+and encapsulates it into a constant bitrate MPEG-TS trnamsport stream. The input
+source can be a Raspberry Pi camera, internal pattern, UVC webcam, Raspberry Pi
+display or a VNC client display.
 
-# Hardware
-Plug a wire on GPIO 12, means Pin 32 of the GPIO header : this act as the antenna. Length depend on transmit frequency, but with few centimeters it works for local testing.
+avc2ts was originally written by Evariste Courjaud F5OEO as part of the [rpidatv]
+(https://github.com/F5OEO/rpidatv) package.
 
-# Modulator
-**rpidatv** is located in rpidatv/bin folder
-```
-rpidatv -2.0.0
-Usage:
-rpidatv -i File Input -s Symbolrate -c Fec [-o OutputMode] [-f frequency output]  [-l] [-p Power] [-h] 
--i            path to Transport File Input 
--s            SymbolRate in KS (125-4000) 
--c            Fec : 1/2 or 3/4 or 5/6 or 7/8 
--m            OutputMode
-	      {RF(Modulate QSK in RF need -f option to set frequency)}
-              {IQ(Output QPSK I/Q}
-              {PARALLEL(Output parallel (DTX1,MINIMOD..)}
-       	      {IQWITHCLK(Output I/Q with CLK (F5LGJ)}
-	      {DIGITHIN (Output I/Q for Digithin)}
--f 	      Frequency to output in RF Mode in MHZ
--l            loop file input
--p 	      Power on output 1..7
--x 	      GPIO Pin output for I or RF {12,18,40}
--y	      GPIO Pin output for Q {13,19,41,45}
--h            help (print this help).
-Example : sudo ./rpidatv -i sample.ts -s 250 -c 1/2 -o RF -f 437.5 -l
-```
- # Transport stream
-**rpidatv** needs a DVB transport stream in input. In the past, ffmpeg was used to generate transport stream. Because ffmpeg is not completely DVB compliant and induces latency, an other tool is proposed : **avc2ts**
+This copy of avc2ts is modified for the specific needs of [Copenhagen Suborbitals]
+(https://copenhagensuborbitals.com/) rocket flights. For most other uses, in
+particular DATV, the original version is probably the better choice.
 
-# H264 encoder and transport stream encapsulator
-**avc2ts** is located in rpidatv/bin folder
-```
-avc2ts -1.0.0
-Usage:
-rpi-avc2ts  -o OutputFile -b BitrateVideo -m BitrateMux -x VideoWidth  -y VideoHeight -f Framerate -n MulticastGroup [-d PTS/PCR][-v][-h] 
--o            path to Transport File Output 
--b            VideoBitrate in bit/s 
--m            Multiplex Bitrate (should be around 1.4 VideoBitrate)
--x            VideoWidth (should be 16 pixel aligned)
--y 	      VideoHeight (should be 16 pixel aligned)
--f            Framerate (25 for example)
--n 	      Multicast group (optionnal) example 230.0.0.1:10000
--d 	      Delay PTS/PCR in ms
--v	      Enable Motion vectors
--i	      IDR Period
--t		TypeInput {0=Picamera,1=InternalPatern,2=USB Camera,3=Rpi Display,4=VNC}
--e 		Extra Arg:
-			- For usb camera name of device (/dev/video0)
-			- For VNC : IP address of VNC Server. Password must be datv
--p 		Set the PidStart: Set PMT=PIDStart,Pidvideo=PidStart+1,PidAudio=PidStart+2
--s 		Set Servicename : Typically CALL
--h            help (print this help).
-Example : ./rpi-avc2ts -o result.ts -b 1000000 -m 1400000 -x 640 -y 480 -f 25 -n 230.0.0.1:1000
-```
+# Usage
 
-# Console interface
-A console interface is provided under rpidatv/scripts
-```sh
-$ /home/pi/rpidatv/scripts/gbmenu.sh
-```
-# Touchscreen interface
-![Rpidatvgui](/doc/img/rpidatvgui.jpg)
-A graphical interface is provided under rpidatv/bin/ folder
-```sh
-$ /home/pi/rpidatv/bin/rpidatvgui
 ```
+  avc2ts -o file -b videorate -m muxrate -x width -y height -f fps -n MulticastGroup [-d PTS/PCR][-v][-h] 
+    -o      Path to Transport File Output 
+    -b      Video bitrate in bits/s 
+    -m      Multiplex bitrate in bits/s (should be around 1.4 of videorate)
+    -x      Image width (should be 16 pixel aligned)
+    -y      Image height (should be 16 pixel aligned)
+    -f      Frame rate
+    -n      Optional multicast group, e.g. 230.0.0.1:10000
+    -d      Delay PTS/PCR in ms
+    -v      Enable motion vectors
+    -i      IDR period
+    -t      Input type (0=Pi camera, 1=Pattern, 2=USB webcam, 3=Rpi display, 4=VNC)
+    -e      Extra arguments:
+              - For usb camera name of device (/dev/video0)
+              - For VNC, the IP address of the server. Password must be datv.
+    -p      Set the PidStart: Set PMT=PIDStart,Pidvideo=PidStart+1,PidAudio=PidStart+2
+    -s      Set service name; typically the callsign
+    -h      Help
 
+Example:
+  avc2ts -o result.ts -b 1000000 -m 1400000 -x 640 -y 480 -f 25 -n 230.0.0.1:1000
+```