BATC Composite Video Source for pi Zero

[g6hfs]

Hi,

Following the instructions for the video source for a pi zero, after the software build on a pi 4 and an sd card I have a problem, on reboot I get a shutdown message and no display it should show the first testcard according to the article, any help please.

Brian
G6HFS

PS. using the jack video out

[G4EWJ]

I believe that the RPi4 doesn't support the openvg graphics used by the test card program. I'm just guessing, but it's possible that building it on an RPi4 doesn't install openvg correctly.

Try building it on something other than an RPi4.

Brian

[DL1BJV]

Hi Brian,

I am not quite sure, are you using a RPi 4?
You wrote, ' after the software build on a pi 4 and an sd card I have a problem, '
The software will not work on a RPi 4. It will only run on a RPi 1, 2 or 3, or a Pi Zero or a Pi Zero W.

There are three places where you can find information on the BATC Composite Video Source:

The BATC Video Source, based on a Raspberry Pi Zero or later models (but not the Raspberry Pi 4), was published in CQ-TV 270.

https://github.com/BritishAmateurTelevi ... /vidsource

https://wiki.batc.org.uk/BATC_Video_Source

A full system image, 'vidsource.zip' Version 202012150, is available on GitHub here:

https://github.com/BritishAmateurTelevi ... e/releases

Hope you will find a solution.

73 Wolfgang.

[g6hfs]

Hi,

Thanks for all the replies, have it working on the pi zero but on the video out (not hdmi) the testcards are shifted to the left, and are not centered can the position be moved?

Cheers

Brian

[DL1BJV]

Hi Brian,

it should work 'out of the box'.

I haven't come across any ways to move the picture nor have I needed to.

There could be several causes:

- if you have been doing some editing, use a true text editor. Microsoft Word and Wordpad introduce special characters that will cause the file to not work. Notepad++ is recommended,

- the composit output connections on the RPi Zero, the square hole is the video output, the round hole is ground,

- could be that the monitor settings are causing the issue. Sync problem?

- it could also be that the SD-Card is corrupted, perhaps worthwhile rebuilding it if all other measures fail.

Wolfgang.

[G4EWJ]

See https://wiki.batc.org.uk/BATC_Video_Sou ... New_Images

Each testcard is defined by a tcdata??.txt file. The 40 and 52 shown are the X and Y displacement of the images in pixels .

Brian

[g6hfs]

Hi,

Thanks for the info replies, will do some checking.

Brian