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PGenerator and Raspberry Pi 4 support?

 
Author rohirm
User - Mono 
#1 | Posted: 22 Oct 2019 16:22 
Hi,

What is the current state with the Raspberry Pi 4 support for PGenerator?

Author ConnecTED
User - Mono 
#2 | Posted: 22 Oct 2019 18:06 
Hi,

It requires a lot of development as the framework for Pi 3 was not compatible, so when the software will be ready first, then it will be tested to see if it can provide the same bit-perfect RGB output as Pi 3 etc.

Author Anthony99
User - Mono 
#3 | Posted: 12 May 2020 16:18 
Probably a stupid question but given that the Pi 4 supports HDMI 2.0 will this mean that we can manipulate the EDID and use it as a HDR pattern generator without requiring an HD Fury or similar?

Many thanks.

Author ConnecTED
User - Mono 
#4 | Posted: 12 May 2020 16:25 
Hi, I don't think it's available any API to control the metadata with Pi4.

PGenerator does not even support it as a Pi4 device.

If it is available a way to control metadata infoframe, then the developer will take a lot.

Author biasi
User - Mono 
#5 | Posted: 12 May 2020 16:28 
I think that it is not possibile and the rpi p4 is not compatibile with PGenerator software: I have to rewrite the code to use new functions

Author Anthony99
User - Mono 
#6 | Posted: 19 May 2020 02:42 
Thanks for the responses.

So essentially there is nothing to gain from waiting as an HDFury will still be needed for HDR. Presumably all that is needed aside from the Pi is a Dr HDMI 4k?

Anthony.

Author ConnecTED
User - Mono 
#7 | Posted: 19 May 2020 09:10 
The lowest cost HDFury is the Linker or the Integral 300 MHz: https://www.hdfury.com/product/integral-4k60-420-300mhz/

Dr. HDMI can't be used as it can't inject HDR10 metadata.

Author Anthony99
User - Mono 
#8 | Posted: 19 May 2020 11:50 
Thanks for the response. The Dr. HDMI specs were confusing as they seemed to imply that it could so thanks for stopping me from making a mistake. The Integral 300MHz seems to be discontinued and is at a nice price as a result so with a Pi should make a nice low cost HDR pattern generator.

Thanks all.

Anthony.

Author RollsRoyce
User - Mono 
#9 | Posted: 19 May 2020 21:32 
One caveat: it will be for RGB Full only. The Pi does not generate bit-accurate YCbCr for SDR, and neither it nor the HDFury boxes can produce the proper YCbCr for HDR - the mathematics involved are completely different. Generators that can produce the correct YCbCr output for HDR are still very scarce and very expensive.

Author Anthony99
User - Mono 
#10 | Posted: 20 May 2020 10:22 
Thanks for this. Now this is where my ignorance is probably going to get exposed.

I am looking at attempting the calibration of a few TVs, most of them Samsung. There will be no external hardware sources used and as such the only sources will be the internal steaming apps of the TVs. I am probably wrong but the output format of these apps will be RGB so assuming the HDMI port doesn't do anything funky all I need to do is have a bit perfect RGB pattern generator in order to be able to calibrate solely for these apps. I suspect I am probably incorrect about this in quite a few ways!

Anthony.

Author RollsRoyce
User - Mono 
#11 | Posted: 20 May 2020 13:26 | Edited by: RollsRoyce 
Samsung TVs maintain separate memories for HDMI inputs and USB/internal apps. So calibrating one HDMI input would only work for that input unless you choose "Apply to All Inputs" in Settings. This would copy the results to all HDMI inputs but not USB/Internal apps. However, you could copy the final settings and manually apply them while watching something via an internal app such as Netflix.

Author Anthony99
User - Mono 
#12 | Posted: 22 May 2020 07:30 
I had braced myself for such a step in my workflow. As long as the Pi is a suitable pattern generator for the internal apps then a little elbow grease to get things setup properly isn't going to hurt!

Thanks for the assistance.

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 PGenerator and Raspberry Pi 4 support?

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