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

[Ma Begaj]

2008/4/10, Steven Adeff <adeffs.mythtv at gmail.com>:
> On Wed, Apr 9, 2008 at 5:51 AM, 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?
>
>
> XvMC only works with MPEG1/2.
>  MKV and WMV are container formats, so if they contain MPEG2 then they
>  should work with XvMC. But usually they don't, MKV usually contains
>  x264 and WMV usually contains Microsofts media format (loosely based
>  on the standard that x264 is based on, but not quite).

Thanks. I read Myth's Wiki right after I sent the email and it is
mostly hardware limitation.

But there is also information about vaapi and it sound pretty good. It
will hopefully become useful pretty soon:
http://www.freedesktop.org/wiki/Software/vaapi