Generating 1920x1080 Images for Test Cards

[G8GKQ]

I am currently building an HDMI video source, and needed to export a 1920x1080 image from a PowerPoint presentation. However, whenever I tried to "Save As .jpg" I would get a 1280x720 file, losing the high resolution graticule that was an essential part of the test card. Copy and paste produced similar results.

I found a website that explained how to change the Windows PowerPoint "Save as" resolution, and have now reset it to 1920x1080, allowing me to export the test card image from PowerPoint in full resolution.

Essentially, for recent versions of PowerPoint, you need to creat a new registry DWORD (32-bit):

Code: Select all

HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\PowerPoint\Options\ExportBitmapResolution

with the decimal value 144.

Full details are here: https://learn.microsoft.com/en-us/offic ... resolution

Dave, G8GKQ

PS - Don't edit the Windows registry unless you are confident in what you are doing!

[EA7KIR]

Being on Mac, I use Apple's free KeyNote app - a less powerful PP. It allows me to set the Document Size to whatever I want. Doesn't PP offer the same? By the way, PNG and TIF use lossless compression.

[F1CJN_alain]

I have generated the Philips standard test card in HDMI 1920x1080 with a M5stack core2 (ESP32) and the M5stack "Display module 13.2".
This extension module plugs in directly in the M5stack and it has an HDMI output.
The test card software is written with C++ instructions (without any JPG or PGN image).

Unfortunately the output is at a fixed 24 frames per second and only my CAMLINK is able to use the signal for DATV (OBS)..
And also many video monitors do not accept 24 frames/sec.
Lower resolutions are possible at 60 frames/sec.

73's
Alain F1CJN

[VK3IE]

Alain

Looking good, quick Phone snap
Thanks
Robert

[F1CJN_alain]

Hello Bob
I have just read your private message
The black and white squares in the top line are drawned on my monitor.
It is not a software issue but a monitor issue or hdmi to transmitter issue.
In line 236 I correct the line with the variable call instead of the string "F1CJN".
You can download the test card software on GITHUB/F1CJN
For the image of the test card :
https://github.com/F1CJN/M5stack-1920x1 ... _Small.jpg
73's
Alain F1CJN