[mythtv-users] Mythtv-frontend memory usage?

John jksjdevelop at gmail.com
Wed Dec 5 10:27:15 UTC 2018

On 05/12/2018 10:19, James Abernathy wrote:
> 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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>>> MythTV Forums:https://forum.mythtv.org
>> 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
1/ Are we talking about this Firestick 4K? yes

2. Will the ethernet adapter I use on my non-4k version of the Fire 
Stick work on the new 4K version? I think so Amazon list. Yes according 
to "Amazon Ethernet Adaptor for Fire TV and Fire TV Stick with Alexa 
Voice Remote (2017 models), Fire TV Basic Edition and Fire TV Stick 4K ?"

3/ Will Version 30 Pre Frontend on RP3 server video from my 29.1 
backend? Yes amazingly so:-)

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