[mythtv-users] frontend video smoothness

[John]

On 18/05/2020 18:24, James Abernathy wrote:
>
>
> On Mon, May 18, 2020 at 12:54 PM John Pilkington 
> <johnpilk222 at gmail.com <mailto:johnpilk222 at gmail.com>> wrote:
>
>     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
>     >
>
>
> With v31 of the Frontend playback on Intel hardware using VAAPI is 
> very good. It may be worth unplugging a cheap Nvidia card and trying 
> the onboard graphics.


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