Function to change test cards?

Discussion about this major DATV Project. See https://wiki.batc.org.uk/The_Portsdown_Transmitter
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VK3EHT
Posts: 7
Joined: Mon Jan 16, 2017 12:18 am

Function to change test cards?

Post by VK3EHT » Sat Apr 04, 2020 10:18 am

Hello,
Is there any possibility to add the ability to allow changing test cards through the menu? :D
:D

G8GKQ
Site Admin
Posts: 2928
Joined: Sun Mar 22, 2009 1:21 pm

Re: Function to change test cards?

Post by G8GKQ » Sat Apr 04, 2020 2:01 pm

Hi

If you want to make a one-off change, you can replace the file rpidatv/scripts/images/tcf.jpg with your chosen test card.

It's a lot of work to make the test card image changeable. I did it for the Comp Video output mode, because it has a genuine technical purpose there, but once you start transmitting a still digital image by DVB-S or DVB-S2, there is little to be gained by changing the image.

Dave, G8GKQ

VK3EHT
Posts: 7
Joined: Mon Jan 16, 2017 12:18 am

Re: Function to change test cards?

Post by VK3EHT » Tue Apr 07, 2020 12:25 am

Dave,

Thanks for the reply.

I've since had a poke around in the code on git and noticed there was a few references to the chart is the bash scripts.

All good. Thought others may have wanted to change charts.
I've recently created my own HD PM5544.png test chart complete with clock and audio using features of FFmpeg. I'm now streaming it as a test through BATC streaming services. Done plenty of reading these last few days. Really nothing else to do until the Pandemic blows over.

73's from down under.
:D

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