[mythtv-users] Playback lag when recordings start

jr jraymyth at gmail.com
Mon Jan 26 21:16:34 UTC 2009


On Mon, Jan 26, 2009 at 2:15 PM, Brad DerManouelian
<myth at dermanouelian.com> wrote:
> On Jan 26, 2009, at 11:05 AM, jr wrote:
>
>> I am sure that this must have been covered before, but I have done
>> searches on combinations and variations on playback, lag, pause,
>> record, start, multiple tuners etc, with no joy.  I am running an AMD
>> 4200 dual core, 1GB mem,  with two digital and two analog tuners.
>> When a recording starts, the currently playing recording lags out for
>> 30 seconds to a full minute.  Unsurprisingly, the lag is worse with
>> digital than with analog.  What I was searching for was techniques and
>> tweaks that might ameliorate the lag.  If anyone could point me at
>> such posts, I would be grateful.
>
> Sure. Check out any of the posts about LiveTV being slow. You should find a
> whole lot of information about what happens when starting to watch a
> program. Some of it has to do with changing channels and switching tuners,
> etc. but you'll also find information about the amount of time it takes to
> start watching video.
>
> Also, run mythfrontend with -v all so you can see all the things it's doing
> before watching and try to find your bottlenecks there. MySQL is typically
> one - especially if the database is on the same drive as your recordings or
> doesn't have enough memory allocated to cache queries.
>
> -Brad
>
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Thanks Brad. That did it.


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