kopia lustrzana https://github.com/F5OEO/rpidatv
82 wiersze
3.2 KiB
Markdown
82 wiersze
3.2 KiB
Markdown
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# rpidatv
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**rpidatv** is a digital television transmitter for Raspberry Pi (B,B+,PI2,PI3,Pizero) which output directly to GPIO.
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*(Created by Evariste Courjaud F5OEO. Code is GPL)*
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# Installation
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Install a Raspbian Lite : ([Raspbian Lite](http://www.raspberrypi.org/downloads/raspbian/))
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```sh
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$ wget https://raw.githubusercontent.com/F5OEO/rpidatv/master/install.sh
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$ chmod +x install.sh
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$ ./install.sh
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```
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# Hardware
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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.
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# Modulator
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**rpidatv** is located in rpidatv/bin folder
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```
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rpidatv -2.0.0
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Usage:
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rpidatv -i File Input -s Symbolrate -c Fec [-o OutputMode] [-f frequency output] [-l] [-p Power] [-h]
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-i path to Transport File Input
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-s SymbolRate in KS (125-4000)
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-c Fec : 1/2 or 3/4 or 5/6 or 7/8
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-m OutputMode
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{RF(Modulate QSK in RF need -f option to set frequency)}
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{IQ(Output QPSK I/Q}
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{PARALLEL(Output parallel (DTX1,MINIMOD..)}
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{IQWITHCLK(Output I/Q with CLK (F5LGJ)}
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{DIGITHIN (Output I/Q for Digithin)}
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-f Frequency to output in RF Mode in MHZ
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-l loop file input
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-p Power on output 1..7
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-x GPIO Pin output for I or RF {12,18,40}
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-y GPIO Pin output for Q {13,19,41,45}
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-h help (print this help).
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Example : sudo ./rpidatv -i sample.ts -s 250 -c 1/2 -o RF -f 437.5 -l
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```
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# Transport stream
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**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**
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# H264 encoder and transport stream encapsulator
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**avc2ts** is located in rpidatv/bin folder
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```
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avc2ts -1.0.0
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Usage:
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rpi-avc2ts -o OutputFile -b BitrateVideo -m BitrateMux -x VideoWidth -y VideoHeight -f Framerate -n MulticastGroup [-d PTS/PCR][-v][-h]
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-o path to Transport File Output
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-b VideoBitrate in bit/s
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-m Multiplex Bitrate (should be around 1.4 VideoBitrate)
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-x VideoWidth (should be 16 pixel aligned)
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-y VideoHeight (should be 16 pixel aligned)
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-f Framerate (25 for example)
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-n Multicast group (optionnal) example 230.0.0.1:10000
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-d Delay PTS/PCR in ms
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-v Enable Motion vectors
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-i IDR Period
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-t TypeInput {0=Picamera,1=InternalPatern,2=USB Camera,3=Rpi Display,4=VNC}
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-e Extra Arg:
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- For usb camera name of device (/dev/video0)
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- For VNC : IP address of VNC Server. Password must be datv
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-p Set the PidStart: Set PMT=PIDStart,Pidvideo=PidStart+1,PidAudio=PidStart+2
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-s Set Servicename : Typically CALL
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-h help (print this help).
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Example : ./rpi-avc2ts -o result.ts -b 1000000 -m 1400000 -x 640 -y 480 -f 25 -n 230.0.0.1:1000
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```
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# Console interface
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A console interface is provided under rpidatv/scripts
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```sh
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$ /home/pi/rpidatv/scripts/gbmenu.sh
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```
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# Touchscreen interface
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A graphical interface is provided under rpidatv/bin/ folder
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```sh
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$ /home/pi/rpidatv/bin/rpidatvgui
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```
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