[mythtv-users] AVSync2 with sports
Tim Draper
veehexx at zoho.com
Sun Feb 17 20:45:37 UTC 2019
---- On Sat, 16 Feb 2019 19:53:13 +0000 Peter Bennett <pb.mythtv at gmail.com> wrote ----
>
>
> On 2/16/19 2:01 PM, Tim Pletcher wrote:
> > I was watching basketball today and I noticed the on-screen motion
> > appeared to be jerky or hitching (source: LiveTV FOX 1280x720 at 59.94
> > fps). The on-screen frame rate fluctuation was particularly apparent
> > in the horizontal scrolling bar along the bottom of the screen. This
> > is on a quad core Apollo lake system using VAAPI2 decoding with
> > AVSync2 enabled with all four cores are staying below 25% utilization
> > in Playback Data. As an experiment, I disabled AVSync2 and found the
> > legacy AVSync to be much smoother.
> >
> > Has anyone else noticed similar issues with AVSync2 and high motion
> > source material like sports?
> >
> I wonder if this could have been the LiveTV problem of not catching up
> after being started. Try pressing pause for a couple of seconds and then
> unpause. There is a bug with Live TV and AVSync2 that was fixed in a
> patch yesterday - after that patch you will no longer need to pause and
> unpause to get it smooth, although it may take a minute or so to smooth
> out after starting play.
>
> Let me know if the pause and unpause fixes it.
>
> Peter
seems the AVSync2 patch has helped it smooth out after about 10 secs but not as good as AVsync(1) at the start of playback. I did noticed that patch avsync2 became jerky again after a few minutes of smooth playback however (only seen on one livetv playback - UK BBC2 HD). As you've noted Peter, a quick pause/play seems to resolve it.
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