[mythtv-users] Is this beefy machine really not enough to drive HD at 1080p?

[Ashley Bostock]

On 09/04/2008, Ma Begaj <derliebegott at gmail.com> wrote:
> 2008/4/8, Steve Curtis <scurtis at fixation.net>:
>
> > 2008/4/8 Scott Harris <mythtv at webhounds.net>:
>  >
>  > >
>  > >
>  > >
>  > > Well, I'm not happy about it, but I can live knowing that it is
>  > > difficult for even the big dogs to decode 1080p ;)
>  > >
>  > >
>  >
>  > I've got a 6400+ in my machine and I couldn't do 1080p - it was stuttering
>  > quite badly.  Then I did some updates from mythbuntu, one of which I think
>  > was an X update and suddenly things got a lot smoother.  Its still not
>  > perfect, but totally watchable.  I tried all sorts of xorg and mplayer
>  > commands - none of which ever really helped.  CPU still spikes at 100% - but
>  > a lot of content has black bars top and bottom which I think helps a little
>  > - I only have one 1080p x264 video which is full res and like I say its
>  > watchable - but stutters on slow panning shots still.
>  >
>  > I'm now moving to a separate front/backend in the hope that this will help
>  > in the future so that its an easier job of changing things to get the
>  > performance without messing around with my backend anymore.
>  >
>
>
>
> So bad? I have no HD content at all (no HD channels in my country) but
>  I tested playing 720p/1080p mkv/wmv trailers files a few weeks ago.
>
>  I have AMD AM2 X2 3800 35W and I had no problems when playing 1080p.
>  mplayer is working fine with "-vo xv" ....  I use "-cache" to cache
>  64MB or even 132MB which can help a lot. cpu is on 50-70%.
>
>  I usually use "-vo gl" because I can position subtitles on the bottom
>  of the screen and OSD on the real top of the screen. And "gl" can
>  handle contrast, brightness etc. "xv" is not able to do that. But "gl"
>  needs more cpu, and 1080p is  stuttering with "-vo gl".
>
>  I was not able to play same files with Internal player. I don't
>  remember the error, but it just could not start the files.
>
>  I know that mplayer can use XvMC only for mpeg files.
>  Is Internal player able to play mkv or wmv files with XvMC?
>
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The resolution is only half the problem. Whether you can play a video
in 1080p largely depends on how high of a bit rate the file has been
encoded in.  A bad quality low bit rate 1080p clip will need lot less
system requirements to play than a high quality high bit rate blu-ray
rip.

Ash