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coolboy18  
#1 Posted : Friday, May 22, 2020 10:45:37 PM(UTC)
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Hi Guys,
Today I dealt again with the NDI monitor and the Raspberry PI.
Until now it was not possible because of the ARM CPU, but apparently the problem has now been solved.

I came across the following article
https://www.mgraves.org/...o-display-an-ndi-stream/

The developer website
https://dicaffeine.com

I tried it with a Raspberry PI 3B + and had to find out that it didn't really work. The CPU is fully utilized and there are always dropouts in the image. It was only when I activated the Low Resolution option that it worked but the picture was bad. The CPU load then went back to 600 MHz and remained stable there.

My vMix edition was goods 1280x720p by 30fps

Maybe someone can test it on a Raspberry PI 4, unfortunately I have none available.

I used Buster with desktop because a desktop icon is created which you have to click on.


mjgraves  
#2 Posted : Saturday, May 23, 2020 1:51:05 AM(UTC)
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That's my blog. I used Pi4. Was directly in touch with the Jiří Melnikov, author of Dicaffiene.

I'm looking for a Pi compatible platform that has more CPU grunt, so we can do 1080p30.

However, Jiří Melnikov is also working porting to Linux on Arm. That would open the door to various hardware. Maybe an Asus Tinker S would be better. Needs CPU to be under 80% to be stable.
coolboy18  
#3 Posted : Saturday, May 23, 2020 2:12:49 AM(UTC)
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Ah ok,
I am also looking for a small solution for a projector that is as free as possible from latency.
I am currently using an HP Prodesk that is relatively large, so a raspberry PI is the best.

1080p30 would of course be the best for me too. Which Raspberry PI 4 did you have for testing with 2 GB RAM or with 4 GB RAM?



Let's see how the project continues. Drivers will surely perform better.


What about the license? So how did I see it, how was it a device ID, when I have to reinstall the raspberry or do I want to use the license on another PI?
mjgraves  
#4 Posted : Saturday, May 23, 2020 5:36:00 AM(UTC)
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Yes, as the post described, in my last project I used Lenovo M73 Tiny for projectors. The i5-4790 was a good solution.

I have Pi4 with 2GB and 4GB. Both work fine. Dicaffeine uses very little memory.

I don't have a license yet, so I'm not sure how that works.
coolboy18  
#5 Posted : Saturday, May 23, 2020 6:45:50 PM(UTC)
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I only have an i3-4160t that works, but the load on the internal graphics card is very high, which leads to stutters. I have already considered swapping the CPU for an i5 4590t, I don't know if that will bring anything.


I will definitely keep an eye on that with dicaffeine, maybe the Raspberry PI will be a real alternative as an NDI monitor. I could imagine that the price is great.


xaver  
#6 Posted : Tuesday, May 26, 2020 1:54:30 AM(UTC)
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Originally Posted by: coolboy18 Go to Quoted Post


Maybe someone can test it on a Raspberry PI 4, unfortunately I have none available.

I used Buster with desktop because a desktop icon is created which you have to click on.




Here a PI4 2GB works very well with a 720p50 NDI Source
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