[mythtv-users] Live TV Playback - Is There a Fix?

[jim]

On 03/01/2015 09:47 AM, Tim Draper wrote:
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> ---- On Sun, 01 Mar 2015 01:53:29 +0000 Mark Perkins<perkins1724 at hotmail.com> wrote ----
>   >
>   >
>   > > On 1 Mar 2015, at 9:59 am, "jim" <jim_32766 at hotmail.com> wrote:
>   > >
>   > >
>   > >> On 02/28/2015 06:03 PM, jim wrote:
>   > >> Does anyone know how to have live TV always use vaapi instead of sometimes using ffmpeg? Is there a setting that needs to be set? Is this a bug in the system? Can it be fixed?
>   > >>
>   > >> The jerkiness of live TV via ffmpeg make the program unwatchable.
>   > >>
>   > >> The only work-around I've found is to exit live TV after moving to the next selected channel, and then re-select live TV. It seems the system always uses vaapi for the first channel when entering live TV. This work-around has low WAF.
>   > > I've also notice that the Frames Decoded/Free ratio increases significantly if, after entering live TV mode, I pause the the program for a couple of seconds before continuing to watch. Thoughts?
>   > > _______________________________________________
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>   > As I understand it, it is a known bug. Not sure if it is being worked on currently however. It appears to relate to a commit around PiP.
>   >
>   > https://code.mythtv.org/trac/ticket/12319
>   > _______________________________________________
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>   >
>
> This sounds like a problem i'm seeing with my VAAPI NUC FE. (that, mixed with livetv HD channel starts with to too little buffer also causing stuttering).
> I'd love to be able to fix these issues myself and help out, but i'm no dev/programmer! :(
>
>
I agree - I too would help if I could.

Have you looked at the Frames decoded/free metric to see how the ratio 
changes if you pause live TV HD for a few seconds and then continuing 
with regular viewing?