DVB-T on a Jetson NANO

Discussion about the Knucker DVB-T Tuner DVB-T Receive Software. See also https://wiki.batc.org.uk/Knucker
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G4GUO
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Joined: Tue Feb 16, 2010 12:51 pm

DVB-T on a Jetson NANO

Post by G4GUO » Sun Jan 31, 2021 11:49 am

I thought I would relate my experiments using a Jetson NANO.
I am using the same software stack for transmit as the Portsdown uses.

I started by using the NGINX rtmp server but it consumes a huge amount of processing on the NANO.
So I have now swopped to using a a UDP (H.264) transport stream generated by OBS on my main PC.

On the NANO I use a version of FFmpeg that has support for hardware video encoding/decoding.
https://github.com/jocover/jetson-ffmpeg

This transcodes from h.264 to h.265 generates a transport stream which is then sends to the DVB-T stack.
Then using a LimeSDR I can get it to transmit up to a 6 MHz DVB-T signal. I would like to tweak the code to achieve
a full 8 MHz signal (just because I can).

I have not tried it yet but it should be possible to simply plug a webcam into the NANO and use that as a simple
video source for mobile operation.

I have used one of the LDMOS 60W brick amplifiers from G.H Engineering but only at about 5 watts output.

I am currently thinking about what would make the best mobile antenna setup. 1 antenna or 2 with power split
between them to give some diversity.

- Charles

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