[mythtv-users] Jerky playback with ITV HD

[Another Sillyname]

2010/1/3 T D <topper.doggle at googlemail.com>:
> I'm running 0.22-fixes.  I have two boxes, each running a frontend and
> backend.  One backend contains a DVB-S card which is pointed at 22.2E
> for Astra and Eurobird (in particular "Freesat" services here in the
> UK).  My CPU is an Athlon 64 X2  6000+, and I have an Geforce 8300
> (the onboard version of the 8200) connected via HDMI.
>
> The main reason for having the DVB-S is that DVB-T in the UK doesn't
> yet support HD, and I want to watch BBC HD and ITV HD.  Things mostly
> work well, but ITV HD is flaky.  I've finally managed to tune it in,
> but it's sometimes rather jerky.  My system is currently set to use
> VDPAU Slim.  Also, I should say that BBC HD is problem-free on this
> setup.
>
> So, with -v playback on ITV HD, I notice lots of:
> 2010-01-03 14:28:10.285 Set video sync frame interval to 40000
> 2010-01-03 14:28:10.285 Enabled deinterlacing
> 2010-01-03 14:28:10.320 Set video sync frame interval to 40000
> 2010-01-03 14:28:10.320 Enabled deinterlacing
> 2010-01-03 14:28:10.352 Set video sync frame interval to 40000
> 2010-01-03 14:28:10.385 Enabled deinterlacing
>
> I'm not sure what this means, but I don't see why it's happening 20-30
> times a second.  I am guessing that anything occuring this often could
> be enough to make the ITV HD playback jerky, but I don't know what to
> do about it.  For what it's worth, I tried changing from VDPAU Slim to
> (non-VDPAU) Normal, and the jerkiness went, but there was a blurriness
> instead, CPU utilization was up to 90%, and the "Set video sync frame
> interval to 40000" messages vanished although the "Enabled
> deinterlacing" was still present.
>
>
> Can anyone provide advice on how I should debug this further?
>
> --
> TD
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>

I realise this is counter intuitive but have you tried turning logging off?

I've seen situations in the past where the log files being created
were causing issues as they were getting written to disk (because so
much info was being written).

Also if your using a multi core system have you set playback profile
to use all the cores?