[mythtv-users] Mythtv-frontend memory usage?

[James Abernathy]

On 12/5/18 5:09 AM, John wrote:
> On 04/12/2018 20:43, James Abernathy wrote:
>> I’m trying to build a Raspberry PI 3 B+ dedicated to Mythth-frontend. 
>>  I’m close to where I need to be, but years of working on selling 
>> CPUs into GFX and Video applications makes me hyper sensitive to 
>> minor video issues. I think it’s a curse in this case.
>>
>> Giving 256MB of RAM to the GPU limits you some.  Things I noticed 
>> that surprised me a little.
>>
>> 1. If I have Raspbian Lite, Xserver, XFCE, and  lightdm  with 
>> Mythtv-frontend, Mybuntu 28.21 theme and an HDTV recording playing I 
>> have 35 MB of memory free with no Swap used. Here I launched 
>> mythfrontend after setting performance mode on scaling governor.
>>
>> 2. If I only install  xserver, matchbox window manager, lightdm with 
>> the Mythtv stuff as #1 I also have 35 MB free
>>
>> 3. Using Openbox instead of Matchbox the same 35 MB free.
>>
>> Both 2 and 3 autolaunch and autologin per the Mythtv RPI wiki
>>
>> 4. If I change the theme to the Default Mythtv 1.4/7 one,  then I 
>> have 122 MB free.
>>
>> 5. FE locked up if I tried to run the Xmas theme.  I imagine it has 
>> the largest memory load.
>>
>> In either case the video performance is the same. Basically the video 
>> is great if the motion is not too fast.  quick panning is jumpy.
>>
>> I basically followed the tips from the Mythtv Raspberry pi wiki.
>>
>> Anything else I can try?
>>
>> My goal is to use the RP3B+ as my frontend without having to use Kodi 
>> 18. The video performance of Kodi 18 on RP3 is very good compared to 
>> Mythtv FE, but the Kodi interface is not to my liking.
>>
>> I have a NUC Core i3 running Xubuntu with Mythtv FE on it and it 
>> works perfectly, but I need the NUC else where.
>>
>> BTW, I tested the Kodi 18rc on the NUC and it’s video is not as good 
>> as 17.6 and when it was installed it messed up the Mythtv FE. I had 
>> to uninstall Kodi 18rc to get Mythtv FE back to normal. The only way 
>> I could see the video issue was to watch a news crawl across the 
>> bottom of the screen.
>>
>> Jim A
>>
>>
>>
>>
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>
> I find the panning judder on the pi with myth 29 unacceptable at 
> 1280i. Version 30 pre is an improvement with the new sync mechanism 
> and I find 720i acceptable on a 32ins TV. Kodi gives perfect pictures 
> at 1280 if you are ok with the interface. Using Rasbian out of the box 
> with 256m screen memory and Steppes theme not suffering memory issues,
>
> The Firestick 4K is a game changer with picture quality as good as 
> Nvidia. It is not however currently reliable enough for production use,
>
> The Firestick 4K is much bett
>
>
Interesting feedback.  I have 3 questions:

1. Are we talking about this Firestick 4K? 
(https://www.amazon.com/Introducing-Fire-TV-Stick-4K-with-All-New-Alexa-Voice-Remote/dp/B079QHML21/ref=sr_1_3?ie=UTF8&qid=1544004803&sr=8-3&keywords=fire+stick+4k)

2. Will the ethernet adapter I use on my non-4k version of the Fire 
Stick work on the new 4K version?

3. Will Version 30 Pre Frontend on RP3 server video from my 29.1 backend?

Jim A


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