[mythtv-users] v30 unsmooth playback

Peter Bennett pb.mythtv at gmail.com
Sat Feb 9 21:46:54 UTC 2019

On 2/9/19 3:39 PM, Tim Draper wrote:
> ---- On Sat, 09 Feb 2019 19:26:59 +0000 Peter Bennett <pb.mythtv at gmail.com> wrote ----
>   > If you run the frontend with -v playback you may see messages indicating
>   > what is happening.
>   >
>   > You can also try settings - playback, advanced and select AVSync2.
>   > AVSync2 is designed to make playback smoother. We are still working on
>   > it so there will be further improvements later
>   >
>   > You can also try VAAPI2 playback profile - it has some advanced
>   > interlacing options (marked HW-VA).
>   >
>   > Peter
>   >
> lots of "Player(0): dropping frame to catch up, lateness=37000 usec" when using the Bob deinterlacer on VAAPI v1.
> AVSync2 already ticked. not something i've done myself so i assume it's default enabled?
> Some of the vaapi2 hw-va options work but get a lot of AVSync time drift when seeking (1200ms). The AVSync process does realign over a few seconds.
> cpu/gpu isnt the gruntiest thing (https://ark.intel.com/products/81071/Intel-Celeron-Processor-N2830-1M-Cache-up-to-2-41-GHz-) so assume it's just lacking power to handle the more intensive deinterlacers.
> any ideas why i'm now having issues between 29>30 upgrade? while i don't know what i was running on v29, i'd of thought that v30 upgrade wouldn't of touched the playback config so does that point to something other than the work your doing on avsync2?
> _______________________________________________
Is that using a bob 2x deinterlacer? That doubles the frame rate and 
perhaps the screen refresh is not high enough for that. To use a 2x 
deinterlacer you need a screen refresh of 60 Hz. You could try selecting 
one of the non-2x deinterlacers. It is supposed to switch to the 
fallback deinterlacer when the screen refresh is not high enough, but 
perhaps that is not happening.

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