[mythtv-users] LiveTV stutter while in EPG/Guide

[Matt Piermarini]

On 10/24/2012 07:27 AM, Scott Harris wrote:
>>> I'm working on wife factor here.. Live TV does work, with a couple 
>>> sub-second pauses here and there, but wife acceptable.  The problems 
>>> I'm having is while watching liveTV, and I bring up the EPG, the 
>>> >>smaller TV picture in the corner will stutter.  A couple seconds 
>>> after bringing up the guide, it will be fine.  Then, after each 
>>> up/down arrow press to browse the guide will result in the same 
>>> stutter, level >>out, stutter, level out, stutter, level out, etc. 
>>> It works, but is very annoying.
>>>
>>> This happens on both frontends: (core2duo/NV G210 and Nvidia ION -- 
>>> both using vdpau). -- HDHR Prime directly connected to backend. 
>>> Tried both .25 and .26.  I did NOT have this problem on .24. 
>>> >>Happens on any VDPAU profile.. happens on any content (1080i, 
>>> standard-def (which actually is worse believe it or not)).
>>>
>>> Does anybody else see this, and if so, do you just deal with it?
>>>
>
>> This is not much help but I'm having the same issue too. 0.24 was 
>> fine but on 0.26 every time I press the mouse while the EPG is up the 
>> picture stutters. I kind of just deal with it but it's got to the 
>> stage >where I'm contemplating going back to 0.24 because it's so 
>> annoying.
>
>> Mark
>
> In 0.25, apparently code was changed so that every time you jump to a 
> new channel (you'll notice there is no stutter if you scroll 
> horizontally across the time), some stuff including a sql query is 
> done to determine if the channel you just navigated to would be 
> tunable (i.e. it doesn't have a scheduled recording with new free 
> tuners, etc).  The "stuff" that happens causes the stutter while it 
> processes.  I agree, it's annoying, but apparently necessary.
> _______________________________________________
>
I agree that it does more "work" when moving channel to channel in the 
guide, but I can't believe that it's so much as to cause the video to 
get starved for resources.. the CPU's are only at 5%.   The network 
might get saturated for the SQL queries, as it is streaming the video 
from the BE and the mysql engine is on that same backend. I'll check 
that.  Has anybody tried jumbo frames (MTU 9000)? Good/bad/no difference?

Matt