[mythtv-users] frontend video smoothness

[John Pilkington]

On 18/05/2020 16:50, Jim Abernathy wrote:
> I now have an easy way to test multiple frontends very quickly switching 
> between them to compare which is best.
> 
> And as all of you know the best can be different depending on which 
> video, which format, etc. I've found a short scene where the camera pans 
> past a number of people, and that motion makes the pan seem slightly 
> jerk, but not bad, certainly it doesn't prevent enjoyable viewing of the 
> program.
> 
> Hardware:
> 
> Backend common for all frontends. Core i7 Ubuntu 18.04 server Mythtv 
> v31. All video captured is MPEG2 USA OTA HD 1080i (1920x1080 at 30hz). 
> Average bit rate is 10Mb/s.
> 
> Frontends:
> 
> 1. Core i7 with Nvidia GT 1030 fanless GFX card
> 
> 2. Nvidia Shield TV running mythfrontend and leanfront.
> 
> 3. RP3B+ with MPEG2 license.
> 
> I would have guess before hand that the PC with the GT1030 would be the 
> best, but it wasn't.

Using DVB-T/T2 in the UK I find that the Leanfront on a 4K Firestick is 
excellent when it works, but it still seems to need purely progressive 
content and that often can't be guaranteed.  I have GT710s, which are 
less capable than your GT1030, and they lack smoothness in panning when 
using nvdec hardware decoding.  But with i5 4-core 3 GHz software 
decoding, playback is as smooth as I get from DLNA or the leanback on 
appropriate content.  I haven't seen what newer and cheaper devices can 
do, but I'm sceptical.  I think you ought to try software decoding on 
your i7.

And I recently noticed that the leanfront seems to work well with live 
DVB-T mpeg2 material, while recordings now have good audio but the video 
pauses briefly about once a second and sync is terrible...

John P

> 
> ratings:
> 
> 1.  Nvidia Shield TV Leanfront.
> 
> 2.  PC with GT1030 mythfrontend
> 
> 3. Nvidia Shield TV mythfrontend
> 
> 4. RPi3B+ Kodi 18.6
> 
> 5. RPi3B+ mythfrontend
> 
> It's good to see that mythtv frontends are good on a lot of platforms. 
> Thanks to all the developers.
> 
> Jim A
> 
> 
> 
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