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

[Matt Piermarini]

On 10/24/2012 09:57 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
> All I can tell you is that was the explanation that I was given by
> those "in the know" when I raised the issue when it appeared in 0.25.
> Since I have no reason to doubt it, and it made sense (though
> admittedly my first, unspoken thought was "then there must be a better
> way to do it"), I never pursued it any further.  TBH, sadly Live TV
> issues do not get much love (other than being told you're doing it
> wrong if you're using Live TV, so avoid the issues by doing it
> "right") ...
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Funny -- Almost sounds like when I was told "I was holding it wrong" by 
Apple & the iPhone4 debacle.  It's too bad though -- there are some of 
us "old-timers" which still like to channel surf!

Thanks for the input though..

Matt