[mythtvnz] atoms and ions

[Stephen Worthington]

On Fri, 19 Jun 2009 21:44:12 -0700 (PDT), you wrote:

>Just in case I was imagining things, I rechecked and sure enough TV1 and TV2 are not good on Myth with VDPAU. A show which for me is a great example is Spooks 9:30 Mondays on One. It always has many portions where the motion breaks down or pixelates while the scene is panning.
>
>I can play the same recording using mplayer with VDPAU or XBMC with VDPAU and I do not get the same breakup and pixelation.

I get exactly the same problem with using my Myth box to play back
recordings made using MediaPortal on my laptop and my desktop box
(both Vista).  Mplayer can play the TV1 and TV2 files without video
corruption, but the audio is way out of sync (several seconds).
Mythfrontend always pixilates when there is too much movement on
screen, such as panning or close up of action.  But the audio is in
sync.

TV3 is great - Mythfrontend plays it back better than under Windows,
where I have always had a slight judder problem playing back on my TV.
I have an Asus 8400 GS Silent card in my Myth box, and due to my TV's
limitations, I am playing back at 1920x1080 interlaced, which the TV
then scales to its real screen size of 1366x768.  I am using Temporal
1x deinterlace, as anything better than that causes problems (and the
8400 GS probably can not do the Advanced modes properly anyway).

>Some things that may be different between our systems -
>reception, I only just get Freeview|HD approx 60% signal reported. Perhaps if the signal is better you get a better recording and then there is no problem with playback - just theory.

Not likely, as I have the exactly same problem with better signal
levels and three different DVB-T tuners.  It looks as though it is a
problem with Mythfrontend's handling of VDPAU, which is good as fixing
it should not need a new version of the Nvidia drivers.

>What DVB-T card are you using, I am using the NOVA-T 500.
>
>I have no problem with Live TV - well same applies to LiveTV it works fine as long as I do not use VDPAU for TV1 and TV2.
>
>I have no problems with sound, I get good sound for all the HD channels.
>
>I'll have to check what versions of Ubuntu, Myth and Nvidia I am running. But my versions are probably 1 or 2 months old. I try not to updat unless I really have to because enivitably an update causes many hours of work to get everything working again. 
>
>This weekend I am setting up XBMC (have to install from source to get LATM-AAC sound support) and Mythbox to see if that is a workaround until VDPAU is sorted out for my situation.