BATC Forum

Hello,
I redid the image/sound processing on our ATV repeater DB0OV.
Now a PC with HDMI input cards is running for it and we have to use the HDMI signal.

It works great on a TV, the Ryde HDMI signal is not recognized on the HDMI input cards.

When I switch to HDMI security output in the menu I see the Ryde start, but it stops at the input request.

Is there a way to switch the Ryde to a different resolution/refresh rate (e.g. 720 pixels)?

73 Thomas DL5BCA

Surely that is the job of the monitor of HDMI card to explain what resolution it wants from the PI? This is not part of Ryde, it is a set top box, not a repeater input device, but I know several are using it that way.

I have no idea if this will work for a Ryde with a dongle but in the later PI OS versions you might try specifying it in the kernel boot command line held in /boot/cmdline.txt

e.g.

video=HDMI-A-1:1280x720@50D

or whatever you want it to be. Breaking it down the first part is which one of the two HDMIs the above is for HDMI 1, the second part is the resolution, here to be set to 1280x720 and the final bits the refresh rate (50 Hz) and to and forced on (the D) so it will be on with a dongle.

Mike

Hello Mike,

thanks for the reply.

I also expected the grabber card to report to the Ryde what resolution is being used.
But with the Raspi it's probably a little different because the resolution is fixed there.
If this is not supported by the grabber card, it will not work.

Among other things, I had the phenomenon that the picture and sound played cleanly with a Raspi 4, but the sound stuttered with a Raspi 5.
Same resolution etc...
Not all HDMI is the same...

This afternoon I was playing around with /boot/config.txt and locked myself out.
Now I have to pick up the device from the repeater and investigate the problem.

I'm excited to see if I can integrate the Ryde into our repeater.

73 Thomas DL5BCA

Yes you can..

Raspberry is setting via /boot/config.txt the HDMI output to lots of different settings including force, hotplug and resolutions...

This is probably the page with most info. But you may find better on google..
https://github.com/tback/raspberrypi_do ... t/video.md

Be aware Ryde is running on Debian witch is several years old..

Benno

Thanks Benno,

I'll test that when the Ryde is back at the repeater location.

After I destroyed the config.yaml yesterday, I reinstalled the Raspi yesterday.
It's running again now.
However, I had the Ryde set to a fixed frequency of 70cm and had 2 bandwidths 333/1000 kb/s scanned alternately.

Of course I'm missing the settings now.

Can you give me a tip on how to set this up so that these settings are set again when the Ryde boots up?

Does section 8 help you perhaps?
https://wiki.batc.org.uk/Ryde_Software
Gareth

Hallo Gareth,

Great, I hadn't seen that.
Sometimes I have tomatoes on my eyes.

Thank you for the tip.

Unfortunately the problem is still there.
Ryde is at the location and is connected to the video mixing computer via HDMI.
The HDMI grabber card does not recognize an HDMI source in normal mode.
I tried all possible resolutions in the config.txt.

If I click on point 2: HDMI Safe Mode in the Video Output Menu, then the Raspi starts and I can see the startup process:
colorful start screen and the services starting on the image mixer.
Unfortunately the Raspberry stays at the command prompt.

Even if I go into HDMI secure mode and open the menu via SSH then click on "Receive" nothing changes. The display on the HDMI output remains at the display request.

Do I have to take the analog output and convert it to HDMI?

Or does anyone else know ADVICE?

73 Thomas DL5BCA

Thomas

Have you tried using an EDID dongle between the Ryde and the HDMI inputs on the PC?

Whilst developing the HDMI based GB3EY repeater, described in the last issue of CQ-TV, I found that the EDID device helped with some combinations of H.264/H.265 encoders and the Ryde.

In the end the Ryde accepted DDC information from the Porrta HDMI switches used in the repeater and the EDID dongle was not needed.

Have a look at https://en.wikipedia.org/wiki/Extended_ ... ation_Data to see what EDID is used for.

Clive G3GJA

Hi Thomas, just to be sure . Are you using the correct hdmi output. On ryde only the hdmi 1 out closest to the usb ç power input will work . The hdmi 2 witch is closer to the Jack out is not working for ryde but will show the rpi startup.

Benno